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Preprint ARTICLE | doi:10.20944/preprints201608.0006.v1

Hydrochemical Characteristics and Water Quality Assessment of Surface Water at Xiahe County in Tibetan Plateau Pastoral of China

Qian Zhang, Shengli Wang, Muhammad Yousaf, Zhongren Nan, Shuixian Wang, Jianmin Ma, Depeng Wang, Fei Zang

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: surface water; Tibetan Plateau pastoral area; Xiahe County; hydrochemical characteristics; fuzzy comprehensive method; water quality

Online: 2 August 2016 (04:20:00 CEST)

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Preprint REVIEW | doi:10.3390/sci1010015.v1

Endocrine Disrupting Compounds Removal Methods from Wastewater in the United Kingdom: A Review

China K. Gadupudi, Louis Rice, Libin Xiao, Komali Kantamaneni

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: wastewater treatment; temperatures; systematic review; biofilms; endocrine disrupting compounds

Online: 21 March 2019 (00:00:00 CET)

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Preprint ARTICLE | doi:10.20944/preprints201801.0126.v1

Surveillance of Groundwater Quality Using Geographical Information System in Kannur District, India

Thangavelu Arumugam, Praveen Krishna, Sapna K

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: GIS, Groundwater, Physico- chemical parameters, Statistics

Online: 15 January 2018 (16:48:32 CET)

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Preprint ARTICLE | doi:10.20944/preprints201803.0086.v1

IWRM as a System Approach to Water Security: Evidence from the Awash River Basin of Ethiopia

Reta Hailu, Degefa Tolossa, Getnet Alemu

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: Integrated Water Resources Management (IWRM); system thinking; water security; Awash basin; Ethiopia

Online: 12 March 2018 (07:18:33 CET)

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Preprint ARTICLE | doi:10.20944/preprints201706.0045.v1

Paradox of Limited Water Resources in Iran and Goals of Self-Sufficiency in Agricultural Sector

Hamed Rafiee, Fereshteh Balovi

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: Virtual water; Agriculture; Staples; Water resources per capita

Online: 8 June 2017 (18:06:51 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202105.0381.v1

Building-Level Wastewater Monitoring for COVID-19 Using Tampon Swabs and RT-LAMP for Rapid SARS-Cov-2 RNA Detection

Aaron Bivins, Megan Lott, Marlee Shaffer, Zhenyu Wu, Devin North, Erin Lipp, Kyle Bibby

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: SARS-CoV-2; wastewater monitoring; environmental surveillance; RT-LAMP; building-level; near-source; passive sampling

Online: 17 May 2021 (10:07:04 CEST)

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Preprint REVIEW | doi:10.20944/preprints202106.0320.v1

Inherent Bias of SARS-CoV-2 RNA Quantification for Wastewater Surveillance Due to Variable RT-qPCR Assay Parameters

Aaron Bivins, Devrim Kaya, Kyle Bibby, Stuart Simpson, Stephen Bustin, Orin Shanks, Warish Ahmed

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: RT-qPCR; assay validity; standard curve; quality assurance; quality control; wastewater surveillance

Online: 11 June 2021 (14:10:51 CEST)

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Preprint COMMUNICATION | doi:10.20944/preprints202104.0167.v1

Sars-Cov-2 Wastewater Surveillance for Public Health Action: Connecting Perspectives From Wastewater Researchers and Public Health Officials During a Global Pandemic

Jill McClary-Gutierrez, Mia Mattioli, Perrine Marcenac, Andrea Silverman, Alexandria Boehm, Kyle Bibby, Michael Balliet, Francis de los Reyes III, Daniel Gerrity, John Griffith, Patricia Holden, Dimitrios Katehis, Greg Kester, Nathan LaCross, Erin Lipp, Jonathan Meiman, Rachel Noble, Dominique Brossard, Sandra McLellan

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: SARS-CoV-2; wastewater surveillance

Online: 6 April 2021 (10:15:25 CEST)

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Wastewater surveillance for SARS-CoV-2 has garnered extensive public attention during the COVID-19 pandemic as a proposed complement to existing disease surveillance systems. Over the past year, environmental microbiology and engineering researchers have advanced methods for detection and quantification of SARS-CoV-2 viral RNA in untreated sewage and demonstrated that the trends in wastewater are correlated with trends in cases reported days to weeks later depending on the location. At the start of the pandemic, the virus was also detected in wastewater in locations prior to known cases. Despite the promise of wastewater surveillance, for these measurements to translate into useful public health tools, it is necessary to bridge the barriers between researchers and the public health responders who will ultimately use the data. Here we describe the key uses, barriers, and applicability of SARS-CoV-2 wastewater surveillance for supporting public health decisions and actions. This perspective was formed from a multidisciplinary group of environmental microbiology, engineering, wastewater, and public health experts, as well as from opinions shared during three focus group discussions with officials from ten state and local public health agencies. The key barriers to use of wastewater surveillance data identified were: (1) As a new data source, most public health agencies are not yet comfortable interpreting wastewater data; (2) Public health agencies want to see SARS-CoV-2 wastewater data in their own communities to gain confidence in its utility; (3) New institutional knowledge and increased capacity is likely needed to sustain wastewater surveillance systems; and (4) The ethics of wastewater surveillance data collection, sharing, and use are not yet established. Overall, while wastewater surveillance to assess community infections is not a new idea, by addressing these barriers, the COVID-19 pandemic may be the initiating event that turns this emerging public health tool into a sustainable nationwide surveillance system.

Preprint ARTICLE | doi:10.3390/sci2010005

XRF Quick-Scan Mapping for Heavy Metal Pollutants in SuDS: A Methodological Approach

Guri Venvik, Floris Boogaard

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: portable X-ray fluorescence spectrometer (XRF); heavy metals; lead (Pb); zinc (Zn); copper (Cu); topsoil; sustainable urban drainage systems; SuDS; LID; BMPs; WSUD; GI; SCMs

Online: 30 January 2020 (00:00:00 CET)

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Preprint ARTICLE | doi:10.20944/preprints201909.0256.v1

Using Double-Bounded Dichotomous-Choice to Estimate Households’ Willingness to Pay for Improved Water Quality in Bac Ninh Province of Vietnam

Nguyen Van Song , Vu Ngoc Huyen, Le Thi Phuong Dung

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: double-bounded dichotomous-choice; willingness to pay; water quality improvement; handicraft households

Online: 22 September 2019 (16:06:56 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202110.0381.v1

Impacts of Human Interventions on Water Quality of Upper Ganga River Near Haridwar, Uttarakhand: A GIS-Based Analysis

Pradip Kumar Maurya, Sk Ajim Ali, Ateeque Ahmad Ahmad, Krishna Kumar Maurya

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: Physico-chemical parameters; water quality index; land use land cover; GIS integration; special correlation

Online: 26 October 2021 (12:24:29 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201811.0426.v1

Augmented Popperian Experiments: A Framework for Sustainability Knowledge Development across Contexts

Fred Phillips, Hsing-Er Lin, Trudi Schifter, Nicholas Folse

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: sustainability; governance; piecemeal engineering; collaboration; Karl Popper

Online: 19 November 2018 (07:05:11 CET)

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Preprint ARTICLE | doi:10.20944/preprints201904.0047.v1

Willingness to Pay for Improved Water Quality and Influencing factors: An Insight from Chia Lagoon, Malawi

Rodgers Makwinja, Ishmael Kosamu, Chikumbusko Kaonga

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: Chia lagoon, Water resources, willingness to pay (WTP), Malawi

Online: 4 April 2019 (11:30:21 CEST)

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Preprint REVIEW | doi:10.20944/preprints202011.0743.v1

Implications of Inadequate Water and Sanitation Infrastructure for Community Spread of COVID-19 in Remote Alaskan Communities

Laura Eichelberger, Subhabrata Dev, Tricia Howe, David Barnes, Eric Bortz, Brandon Briggs, Patricia Cochran, Aaron Dotson, Devin Drown, Micah Hahn, Kaitlin Mattos, Srijan Aggarwal

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: COVID-19; Alaska Native; water security; sanitation

Online: 30 November 2020 (16:36:11 CET)

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Preprint ARTICLE | doi:10.20944/preprints201711.0109.v1

Hexachlorocyclohexanes, Cyclodiene, Methoxychlor and Heptachlor in Sediment of the Alvarado Lagoon System in Veracruz, Mexico

María del Refugio Castañeda-Chávez, Fabiola Lango-Reynoso, Gabycarmen Navarrete-Rodríguez

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: bioavailability; toxicity; public health; pesticides; aquatic ecosystems

Online: 16 November 2017 (10:59:25 CET)

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Preprint REVIEW | doi:10.20944/preprints202202.0336.v1

Review of Effects of Dam Construction on the Ecosystems of River Estuary and Nearby Marine Areas

Xuan Zhang, Changling Fang, Yuan Wang, Xiaoyi Lou, Ying Su, Dongmei Huang

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: Dam; River estuary; Ecosystem; Effect

Online: 25 February 2022 (13:16:40 CET)

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Preprint ARTICLE | doi:10.20944/preprints202106.0378.v1

Effect of COVID-19 Lockdown on Metal Concentration in the Water Column of Asia’s Largest Coastal Lagoon

Syed Hilal Farooq, Amrit Kumar Mishra, Sandip Kumar Muhakud, Prasannajit Acharya, Pradipta Ranjan Muduli, Debadutta Swain

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: Trace metals; COVID-19; Lagoon ecosystem; Anthropogenic pollution; Water quality; India

Online: 14 June 2021 (15:56:06 CEST)

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A complete halt on all anthropogenic activities and human movement due to COVID-19 lockdown has provided a great opportunity to assess the impact of human activities on coastal marine ecosystems. The current study assessed the concentration of the metals in water samples of the largest brackish water lagoon of Asia; the Chilika lagoon in the state of Odisha, India between pre-COVID-19 and post-COVID-19 lockdown scenarios. Monthly water samples (n=30 stations) from 0.3 m depth were collected from three sectors of the lagoon seasonally; pre-monsoon, monsoon, and post-monsoon. In addition to various physical parameters [pH, salinity, alkalinity, (DO) dissolved oxygen, (TDS) total dissolved solids, and (EC) electrical conductivity] the collected water samples were analysed for 18 trace metals (Al, As, Ba, Be, Cd, Co, Cr, Cu, Fe, Mn, Mo, Ni, Pb, Sr, Th, Tl, U, V). Most of the physical parameters showed a significant variation between pre-and post-COVID-19 scenarios, except for pH and DO. The concentration of five metals (Be, Cd, Co, Ni, and Pb) remained below detection limits in all water samples. The impact of COVID-19 lockdown on the concentration of the metal in the water samples was noticed along with the three sectors of the lagoon. However, eight metals (Al, As, Cr, Fe, Mn, Th, U, and V) were significantly different between the COVID-19 scenarios and the remaining five metals were not statistically significant. The mean concentration of Al, As, Fe, Th, and V were higher in the pre-COVID-19 scenarios, whereas only Cr and Mn were higher in the post-COVID-19 scenarios. The mean concentration of U was similar among both COVID-19 scenarios, even though there were seasonal and sectoral differences. The seasonal influence of riverine influx was more evident on metal concentration during the monsoon season, whereas the difference between sectors was more prominent during the post-monsoon season. An increased number of correlations between physical parameters and metal concentration were observed in the post-monsoon season and post-COVID-19 scenario. This study provides evidence that the imposition of COVID-19 lockdown reduced metal influx in the water column and improved the water quality of the Chilika lagoon. Our results can be used as baseline for metal concentration in surface waters of the lagoon.

Preprint REVIEW | doi:10.20944/preprints202309.0192.v1

Metal Organic Framework (MOF): Synthesis and Fabrication for the Application of Electrochemical Sensing

Ricky Lalawmpuia, Melody Lalhruaitluangi, Lalhmunsiama Lalhmunsiama, Diwakar Tiwari, Jae-Kyu Yang

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: advanced materials; metal organic framework; electrochemical sensor; trace detection; emerging pollutants

Online: 4 September 2023 (11:48:55 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202012.0163.v1

Assessment of Streamflow Simulation for a Tropical Forested Catchment using Dynamic TOPMODEL – Dynamic fluxEs and ConnectIvity for Predictions of HydRology (DECIPHeR) Framework and Generalized Likelihood Uncertainty Estimation (GLUE)

Fadhliani Umar, Zed Diyana, Badronnisa Yusuf, Siti Nurhidayu

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: streamflow; dynamic TOPMODEL; DECIPHeR; GLUE analysis

Online: 7 December 2020 (14:36:02 CET)

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Preprint ARTICLE | doi:10.20944/preprints202101.0557.v1

Stakeholder Networking Analysis on Umbulan Water Supply Project: An Exploratory Study Combined With Meta-Analysis Identification Design

Dimas Trisliatanto, Mohammad Adib, Rustinsyah Rustinsyah, Dewi Kurniasih, Suparto Wijoyo, Moses Glorino Rumambo Pandin

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: Stakeholder; Networking; Stakeholder Networking; Umbulan Water Supply Project

Online: 27 January 2021 (12:28:53 CET)

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Working Paper COMMUNICATION

Sars-Cov-2 Wastewater Surveillance for Public Health Action: Connecting Perspectives From Wastewater Researchers and Public Health Officials During a Global Pandemic

Jill McClary-Gutierrez, Mia Mattioli, Perrine Marcenac, Andrea Silverman, Alexandria Boehm, Kyle Bibby, Michael Balliet, Francis de los Reyes III, Daniel Gerrity, John Griffith, Patricia Holden, Dimitrios Katehis, Greg Kester, Nathan LaCross, Erin Lipp, Jonathan Meiman, Rachel Noble, Dominique Brossard, Sandra McLellan

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: SARS-CoV-2; wastewater surveillance

Online: 7 June 2021 (13:01:18 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202008.0721.v2

Is Rainwater Harvesting Sufficient to Satisfy The Emergency Water Demand for The Prevention of COVID-19? The Case of Dilla town, Southern, Ethiopia

Girum Gebremeskel Kanno, Zemachu Ashuro Lagiso, Zeleke Girma Abate, Abereham Shiferaw Areba, Renay Van Wyk, Mekonnen Birhanie Aregu

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: COVID-19; Dilla; Emergency water demand; Ethiopia; Rain Water Harvesting

Online: 12 October 2020 (10:15:32 CEST)

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Preprint REVIEW | doi:10.20944/preprints202306.1160.v1

Drinking Water Systems as a Cocktail of Emerging Organic Contaminants: Occurrence, Public Health Risks, and Research Needs

Jerikias Marumure, Tinoziva T Simbanegavi, Zakio Makuvara, Rangarirayi Karidzagundi, Richwell Alufasi, Marvelous Goredema, Claudious Gufe, Nhamo Chaukura, Willis Gwenzi

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: Human exposure; high-risk environments; human health hazards; personal care products; pharmaceuticals; per- and polyfluoroalkyl substances; risk factors

Online: 16 June 2023 (03:16:14 CEST)

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Emerging organic contaminants (EOCs) of anthropogenic origins are ubiquitous in environmental compartments, including aquatic systems. Thus, EOCs have attracted considerable research and public attention due to their potential human and ecological health risks. However, compared to other aquatic environments such as wastewater systems, comprehensive reviews focussing on the occurrence and human health risks of EOCs in drinking water systems are still lacking. Therefore, to address this knowledge gap, the current review posits that drinking water systems harbour a cocktail of toxic EOCs, which pose public health risks via multiple exposure routes. In the present review, global evidence is examined to track EOCs along the source-pathway-receptor-impact-mitigation (SPRIM) continuum. Evidence shows that, various groups of EOCs, including pharmaceuticals and personal care products, solvents, plasticizers, endocrine disrupting compounds, gasoline additives, per- and polyfluoroalkyl substances (PFAS), food colourants, artificial sweeteners, and musks and fragrances, have been detected in drinking water systems. The anthropogenic sources of EOCs detected in drinking water systems, including wastewater systems and industrial emissions, are summarized. Further, the behaviour and fate of EOCs in the drinking water systems, including removal processes are discussed. Once in drinking water systems, human exposure to EOCs may occur via ingestion of contaminated drinking water and cooked foods, and possibly dermal contact and inhalation. The high-risk environments, and risk factors and behaviours predisposing humans to EOC exposure are discussed. Evidence on the human health risks of the various EOCs and a critique of the data are presented. Notably, besides inferential data, quantitative epidemiological evidence directly relating the occurrence of EOCs in drinking water systems to specific adverse human health outcomes is still scarce. Lastly, future research directions, including the need for quantitative public health risk assessment, and the application of emerging detection tools are discussed.

Preprint REVIEW | doi:10.20944/preprints202401.1557.v1

Recent Advancements in Per- and Polyfluoroalkyl Substances (PFAS) Detection by Sensors and Surface-Enhanced Raman Scattering (SERS) Method: A Review

Sumaya Tabassum, Asif Ahmed, Shoeb Rahman, Mayida Rubya Tithi, Maliha Mehjabin, Jinat Tasnim Dristy

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: Per- and polyfluoroalkyl substances; PFAS detection sensors; Surface-enhanced Raman Scattering; emerging contaminants ; ;

Online: 22 January 2024 (05:54:27 CET)

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Preprint ARTICLE | doi:10.20944/preprints202003.0147.v1

Optimal Water Allocation in Golden Triangle Energy Region-A case study of Ningxia District.

Yiqing Zhang, Xiaoyan Liu

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: Golden Triangle Energy Region; water resources; optical allocation

Online: 9 March 2020 (02:34:59 CET)

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Preprint ARTICLE | doi:10.20944/preprints201911.0058.v1

Towards a Set of Guidelines for the Development of Robust Water-sharing Systems

Michael Young

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: water rights; robustness; water governance; water scarcity; water allocation; water accounting; water trading; water sharing

Online: 6 November 2019 (10:43:15 CET)

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Preprint REVIEW | doi:10.20944/preprints202304.0964.v1

Review of Slow Sand Filtration for Raw Water Treatment with Potential Application in Less-Developed Countries

Kaldibek Abdiyev, Seitkhan Azat, Erzhan Kuldeyev, Sana Kabdrakhmanova, Ronny Berndtsson, Bostandyk Khalkhabai, Ainur Kabdrakhmanova, Shynggyskhan Sultakhan

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: slow sand filtration; developing countries: microbes; parasites; turbidity; safe drinking water; water treatment

Online: 26 April 2023 (07:25:16 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202304.1152.v1

Assessment of Spatiotemporal Groundwater Recharge Distri-bution Using SWAT-MODFLOW Model and Transient Water Fluctuation Method

Hiyaw Hatiya Ware, Tarekegn Dejen Mengistu, Bisrat Ayalew Yifru, Sun Woo Chang, Il-Moon Chung

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: SWAT-MODFLOW; groundwater recharge; PEST; Water table fluctuation

Online: 28 April 2023 (08:53:09 CEST)

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Preprint CASE REPORT | doi:10.20944/preprints202008.0049.v1

Drinking Water and Diarrheal Characteristic Cases in Darbendikhan City

Sabah Shareef Mohammed, Yadgar Hussien Hama-karim, Mohammed Ibrahim Mohialdeen Gubari

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: diarrhoeal cases; drinking water; water sources; water pollution; Darbandikhan Lake

Online: 2 August 2020 (17:41:51 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201810.0643.v1

Assimilation of Synthetic SWOT River Depths in a Regional Hydrometeorological Model

Vincent Häfliger, Eric Martin, Aaron Boone, Sophie Ricci, Sylvain Biancamaria

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: overland flow, satellite altimetry, hydrological modelling, data assimilation

Online: 27 October 2018 (21:08:48 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202008.0721.v1

Is Rainwater Harvesting Sufficient to Satisfy The Emergency Water Demand for The Prevention of COVID-19? The Case of Dilla town, Southern, Ethiopia

Girum Gebremeskel Kanno, Zemachu Ashuro Lagiso, Zeleke Girma Abate, Abereham Shiferaw Areba, Renay Van Wyk, Mekonnen Birhanie Aregu

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: COVID-19; Dilla; Emergency water demand; Ethiopia; Rain Water Harvesting

Online: 31 August 2020 (10:29:20 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202010.0187.v1

The Impact of Water Loss by Evaporation and Calcite Precipitation on the Sodium Adsorption Ratio (SAR) and an Alternative Method of Estimating the SAR of Irrigation Drainage Water

Qiyu Zhou, William Bleam, Douglas Soldat

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: sodium adsorption ratio; SAR; CROSS, electrical conductivity; specific conductivity; salinity; irrigation; groundwater; water quality

Online: 9 October 2020 (08:45:56 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201910.0096.v1

Test of a Modified Rainfall-runoff Model in Large-scale River Basins

Spyros Giakoumakis, Dimitris Tigkas

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: Rainfall-runoff model; large-scale river basins; calibration; validation

Online: 9 October 2019 (10:16:32 CEST)

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Working Paper ARTICLE

ARIMA-M: A New Model for Daily Water Consumption Prediction, Based on the Autoregressive Integrated Moving Average Model and the Markov Chain Error Correction

Hongyan Du, Zhihua Zhao, Huifeng Xue

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: water resource management; water consumption prediction; Markov chain; autoregressive moving average model; error correction

Online: 10 January 2020 (07:09:20 CET)

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Preprint ARTICLE | doi:10.20944/preprints202208.0318.v1

Monitoring Quality and Pollution Assessment of Groundwater for Drinking Purposes to Assure Sustainability

Saad Alramthi, Gamila Ali, Ahmed Shaban, Tarek Abdou, Atiah Elthagafi, Saad Eldosari, Bao-Ku Zhu, Hosam Safaa

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: Drinking water management; drinking water criteria; groundwater; reverse osmosis; sustainable development; water aesthetics

Online: 17 August 2022 (10:08:44 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202307.1669.v1

A Mathematical Population Growth Model for Urban Water Security Management and Sustainability in Cities (Case Study: Tabriz City)

Saeed Imani, Yagob Dinpashoh, Esmail Asadi, Ahmad Fakheri

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: Population growth; Water demand management; Tabriz

Online: 25 July 2023 (09:17:07 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202007.0695.v1

Performance Study of Integrated Solar-Water Supply System for Isolated Agricultural Areas in Thailand: Two Case-Study Villages of The Royal Initiative Project

Thanongsak Imjai, Kamon Thinsurat, Pakorn Ditthakit, Warit Wipulanusat, Monthian Setkit, Reyes Garcia

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: water resource management; solar-water; solar-water supply system; SWSS; decision support; solar pumping; climate change; royal initiative project

Online: 29 July 2020 (11:40:50 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202303.0369.v1

Bacterial Contamination Levels and Brand Perception of Sachet Water: A Case Study in Nigerian Urban Neighborhoods

I. T. Tenebe, E. O. Babatunde, C. C. Eddy-Ugorji, N. B. Ogarekpe, C. V. Ekeanyanwu, O. S. Oladele, O. B. Ezendu

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: Sachet water; water quality; bacteriological quality; public health; drinking water

Online: 21 March 2023 (06:14:26 CET)

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Preprint REVIEW | doi:10.20944/preprints202212.0043.v1

Heavy Metals Removals from Wastewater and Reuse of the Metal Loaded Adsorbents in Various Applications: A Review

Bienvenu Gael Fouda Mbanga, Tarisa Velempini, Kriveshini Pillay, Zikhona Ngeva-Tywabi

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: adsorption; GBV; heavy metals; secondary pollution; spent adsorbent reuse

Online: 2 December 2022 (08:43:18 CET)

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Preprint ARTICLE | doi:10.20944/preprints202305.1051.v1

Phytoremediation Capacity of Water Hyacinth (Eichhornia crassipes) as Nature-based Solution for Contaminants and Physicochemical Characterization of Lake Water

Esayas Elias Churko, Munyaradzi Chitakira, Luxon Nhamo

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: Heavy metals; water quality; remediation; water security; ecosystem services; spatio-temporal variation; nature-based solution

Online: 15 May 2023 (14:14:33 CEST)

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Working Paper ARTICLE

Design and Fabrication of Strong Parts from Biodegradable Polymer with a Desktop 3D Printer

Vladimir Kuznetsov, Azamat Tavitov, Oleg Urzhumtcev, Mikhail Mikhailin, Alexey Solonin

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: Design for additive manufacturing; desktop 3D printing; fused filament fabrication; polylactic acid; mechanical strength

Online: 20 March 2019 (14:52:37 CET)

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Preprint ARTICLE | doi:10.20944/preprints202308.0896.v1

Towards Open Access and Open Source Software for Image-Based Velocimetry Techniques

Hessel Winsemius, Frank Ohene Annor, Rick Hagenaars, Nick Van de Giesen, Willem Luxemburg, Olivier Hoes

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: river monitoring; image-based; discharge estimation; open-source software

Online: 11 August 2023 (07:54:42 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202304.0112.v1

Flood Mapping and Scour Potential Prediction Using Hydraulic Model Based on Advanced ASV-Measured Extreme Flood Events Triggered by Snowmelt

Vida Atashi, Yeo Howe Lim

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: HEC-RAS model; Red River; LiDAR data; Flood mapping; Manning’s n-coefficient; Contraction Scour Depth

Online: 7 April 2023 (04:54:08 CEST)

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Working Paper ARTICLE

Public attitudes towards Digital Water Meters for households

Steven Hendrik Koop, Sharon Helena Clevers, Elisabeth Johanna Blokker, Stijn Brouwer

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: Water Conservation; Customer Segmentation; Pro-Environmental Behaviour; Smart Water Meters; Water-use Feedback

Online: 7 May 2021 (09:41:56 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202304.0198.v3

Elementary Steps in Steady State Kinetic Model Approximation for the Homo-Heterogeneous Photocatalysis of Carbamazepine

Yuval Shahar, Giora Rytwo

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: carbamazepine; advanced oxidation process; pseudo-order; rate law; half life time; elementary steps; steady-state approximation

Online: 13 April 2023 (03:08:08 CEST)

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Preprint REVIEW | doi:10.20944/preprints202311.1677.v1

Water Management and Hydrological Characteristics of Rice-Paddy Catchments Under AWD Irrigation Practice: Asia and Sub-Saharan Africa

Denis Bwire, Hirotaka Saito, Roy C Sidle, Junko Nishiwaki

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: Water Management; Paddy Soils; Puddling; Ecohydrological Processes; Climate Change; Preferential Flow

Online: 27 November 2023 (11:29:26 CET)

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Global concerns of decreasing water availability and food security are being exacerbated by the increasing demand for food, water quality degradation, and climate change impacts. Rice is an essential crop for food security with paddy rice cultivation largely practiced using traditional flooding conditions. Water regimes and components of the soil water balance in paddy rice catchments affect uptake of water by rice roots. Paddy management, especially puddling, significantly affects soil hydrological properties, such as hydraulic conductivity, percolation, and seepage in the paddy rhizosphere. Improved knowledge of these interactions is vital for developing sustainable water management strategies in paddy fields. Alternate Wetting and Drying (AWD) practice contributes to sustainable water management, but little is known about effects of soil wetting and drying duration on gravitational soil water flow, moisture dynamics, and hydraulic conductivity in the rice paddy rhizosphere. These factors depend on soil type, rice variety, rooting conditions, and environmental factors, such as solar radiation and temperature. Here we examine the paddy cultivation environment and soil properties under traditional continuous flooding and AWD practice. Some studies indicate that the duration and frequency of wetting and soil drying under AWD practice in paddy fields affects soil hydraulic conductivity that alters the next cycle of water application. During droughts and short rainy seasons, rainfall, soil properties, and atmospheric conditions control soil moisture dynamics in paddy fields. Limitations and challenges of applying AWD in paddy soils, including the variation of hydrological properties and the need for frequent field manual monitoring of water level (WL) head, are discussed. Implications of AWD practice on yield, water use efficiency, soil hydrology, and reduction of methane emissions, are outlined along with opportunities to improve AWD integration within government policies, irrigation schemes, and adoption by farmers. Coupled crop models can provide important insights for sustainable agricultural water management.

Preprint REVIEW | doi:10.20944/preprints202209.0214.v1

Worldwide Surveillance Actions and Initiatives of Drinking Water Quality: A Scoping Review

Rayssa Horacio Lopes, Cícera Renata Diniz Vieira Silva, Ísis de Siqueira Silva, Pétala Tuani Cândido de Oliveira Salvador, Léo Heller, Severina Alice da Costa Uchôa

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: Drinking water; potable water; public health surveillance; quality control; government.

Online: 15 September 2022 (02:17:24 CEST)

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Preprint REVIEW | doi:10.20944/preprints202301.0070.v1

Circulatory Pathways in the Water and Wastewater sector in the Latin-American Region (LAR)

Paula C. Soto-Rios, Nidhi Nagabhatla, Brenda Acevedo-Juárez

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: Circular Economy; Water; Wastewater; Resource Use; Latin America

Online: 4 January 2023 (06:39:53 CET)

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Preprint ARTICLE | doi:10.20944/preprints202108.0217.v1

Legionella spp. Colonization in Water Systems of Hotels Linked with Travel-Associated Legionnaires’ Disease

Antonios Papadakis, Maria Keramarou, Dimosthenis Chochlakis, Vassilios Sandalakis, Varvara Mouchtouri, Anna Psaroulaki

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: Legionella; water systems; risk; water safety plan; hotel

Online: 10 August 2021 (09:11:15 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202309.1165.v1

Groundwater Level Prediction with Machine Learning to Support Sustainable Irrigation in Water Scarcity Regions

Wanru Li, Mekuanent Muluneh Finsa, Kathryn Blackmond Laskey, Paul Houser, Rupert Douglas-Bate

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: machine learning; groundwater table; ground water level; sustainable irrigation; drinking water; water-scarcity regions; AI; gradient boosting regression

Online: 18 September 2023 (14:50:59 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202305.0534.v1

Driving Factors of the Hydrological Response of a Tropical Watershed: the Ankavia River Basin in Madagascar

Zonirina Ramahaimandimby, Alain Randriamaherisoa, Marnik Vanclooster, Charles L. Bielders

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: Madagascar; Ankavia catchment; hydrological signatures; catchment descriptors; driving factors

Online: 8 May 2023 (11:55:37 CEST)

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Understanding the hydrological behavior of watersheds and their driving factors is crucial for sustainable water resources management. However, at large scales, this task remains challenging due to the spatial heterogeneity in landscapes, topography, land use, geology, and soil properties. In this context, the aim of this study was to identify the key factors that influence the hydrological system of four watersheds: Ankavia (WS1: 55% forest cover), Ankaviabe (WS2: 77% forest cover), Sahafihitry (WS3: 41% forest cover), and Antsahovy (WS4: 48% forest cover), over a 10-month study period. These catchments are located within the SAVA region of northeastern Madagascar and have a humid-tropical climate. We investigated the relationship between selected catchment descriptors (CD) and hydrological signatures (HS) by using a Pearson coefficient-based correlation matrix. More specifically, CD extracted from topography/morphology (T), land use (LU), soil (S), and geological characteristics (G) were correlated with HS, including base flow index (BFI), runoff coefficient (rc), peak flow (Qp), runoff event time scales (ts), high flows (Q5), low flows (Q95), and mean discharge (q_mean). The analysis revealed that land use, soil properties, and geology seem to be the best predictors for BFI and Q95, while soil properties mainly govern rc, Qp, Q5, ts, and q_mean. These findings provide valuable insights into the key drivers of hydrologic behavior that can inform water resource management strategies. In particular, WS2 has better flood buffering capacity but suffers from lower base flows in the dry season potentially due to higher evapotranspiration. Conversely, WS3 and WS4 (and to a lesser extent WS1) have lower flood buffering capacity, but these watersheds experience less pronounced low flows in the dry season due to higher base flow index resulting from lower evapotranspiration. The results emphasize the importance of sustainable land use practices and conservation efforts, which are essential for the sustainable development of the region. By incorporating these practices into water management strategies, we can help ensure a more stable and reliable water supply for communities and ecosystems within the region.

Preprint ARTICLE | doi:10.20944/preprints202307.1486.v1

Estimation of nutrient loads in an agricultural area: Case study of the Lobo Basin in Côte d'Ivoire (West Africa)

Tanoh Jean-Jacques Koua, Jaehak Jeong, Tadesse Abitew Alemayehu, Yeganantham Dhanesh, Srinivasan Raghavan

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: Modelling; Nutrients; Lobo; Eutrophication; Côte d'Ivoire

Online: 21 July 2023 (08:47:29 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202309.0841.v1

Hydrological Response Assessment of Land Cover Change in a Peruvian Amazonian Basin Impacted by Deforestation Using the SWAT Model

Karla Paiva, Pedro Rau, Cristian Montesinos, Waldo Lavado-Casimiro, Luc Bourrel, Frederic Frappart

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: SWAT model; surface runoff; deforestation; land use change; Amazonia; Peru

Online: 13 September 2023 (07:29:17 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202303.0405.v1

Rainwater and Wastewater Management: A Case Study of Dakar’s Built-up area, Senegal

Abdoulaye FATY, Cheikh DIOP, Waly FAYE

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: Management; rainwater; wastewater; rainfall; urban areas; Dakar

Online: 23 March 2023 (02:08:41 CET)

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Preprint REVIEW | doi:10.20944/preprints202404.0278.v1

Opportunistic Pathogens in Drinking Water Distribution Systems—A Review

Mark LeChevallier, Toby Prosser, Melita Stevens

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: opportunitic pathgoens; drinking water; Legionella; Mycobacterium; Pseudomonas; disinfection

Online: 3 April 2024 (10:32:28 CEST)

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In contrast to “frank” pathogens, like Salmonella entrocolitica, Shigella dysenteriae, and Vibrio cholerae, that always have a probability of disease, “opportunistic” pathogens are organisms that cause an infectious disease in a host with a weakened immune system and rarely in a healthy host. Historically, drinking water treatment has focused on control of frank pathogens, particularly those from human or animal sources (like Giardia lamblia, Cryptosporidium parvum, or Hepatitis A virus), but in recent years outbreaks from drinking water have increasingly been due to opportunistic pathogens. Characteristics of opportunistic pathogens that make them problematic for water treatment include: 1) they are normally present in aquatic environments, 2) they grow in biofilms that protect the bacteria from disinfectants, and 3) under appropriate conditions in drinking water systems (e.g., warm water, stagnation, low disinfectant levels, etc.) these bacteria can amplify to levels that can pose a public health risk. The three most common opportunistic pathogens in drinking water systems include Legionella pneumophila, Mycobacterium avium, and Pseudomonas aeruginosa. This report focuses on these organisms to provide information on their public health risk, occurrence in drinking water systems, susceptibility to various disinfectants and other operational practices (like flushing and cleaning of pipes and storage tanks). In addition, information is provided on a group of nine other opportunistic pathogens that are less commonly found in drinking water systems, including Aeromonas hydrophila, Klebsiella pneumoniae, Serratia marcescens, Burkholderia pseudomallei, Acinetobacter baumannii, Stenotrophomonas maltophilia, Arcobacter butzleri, and several free-living amoebae including Naegleria fowleri and species of Acanthamoeba. The public health risk for these microbes in drinking water is still unclear, but in most cases, efforts to manage Legionella, mycobacteria, and Pseudomonas risks will also be effective for these other opportunistic pathogens. The approach to managing opportunistic pathogens in drinking water supplies focuses on controlling the growth of these organisms. Many of these microbes are normal inhabitants in biofilms in water, so the attention is less on eliminating these organisms from entering the system and more on managing their occurrence and concentrations in the pipe network. With anticipated warming trends associated with climate change, the factors that drive the growth of opportunistic pathogens in drinking water systems will likely increase. It is important, therefore, to evaluate treatment barriers and management activities for control of opportunistic pathogen risks. Controls for primary treatment, particularly for turbidity management and disinfection, should be reviewed to ensure adequacy for opportunistic pathogen control. However, the major focus for the utility’s opportunistic pathogen risk reduction plan is the management of biological activity and biofilms in the distribution system. Factors that influence the growth of microbes (primarily in biofilms) in the distribution system include, temperature, disinfectant type and concentration, nutrient levels (measured as AOC or BDOC), stagnation, flushing of pipes and cleaning of storage tank sediments, and corrosion control. Pressure management and distribution system integrity are also important to the microbial quality of water but are related more to the intrusion of contaminants into the distribution system – rather than directly related to microbial growth. Summarizing the identified risk from drinking water, the availability and quality of disinfection data for treatment, and guidelines or standards for control showed that adequate information is best available for management of L. pneumophila. For L. pneumophila the risk for this organism has been clearly established from drinking water, cases have increased worldwide, and it is one of the most identified causes of drinking water outbreaks. Water management best practices (e.g., maintenance of a disinfectant residual throughout the distribution system, flushing and cleaning of sediments in pipelines and storage tanks, among others) that have been shown to be effective for control of L. pneumophila in water supplies. In addition, there are well documented management guidelines available for the control of the organism in drinking water distribution systems. By comparison, management of risks for Mycobacteria from water are less clear than for L. pneumophila. Treatment of M. avium is difficult due to its resistance to disinfection, the tendency to form clumps and attachment to surfaces in biofilms. Additionally, there are no guidelines for management of M. avium in drinking water and one risk assessment study suggested a low risk of infection. The role of tap water in the transmission of the other opportunistic pathogens is less clear and in many cases actions to manage L. pneumophila (e.g., maintenance of a disinfectant residual, flushing, cleaning of storage tanks, etc.) will also be beneficial in helping to manage these organisms as well.

Preprint ARTICLE | doi:10.20944/preprints202306.1979.v1

Analysis of glacier hydrological model components with applications to Chile's Maipo Basin

Mumtaz Ahmad, Mushfiqur Rahman

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: glacier hydrological modeling; mHM (Mesoscale Hydrological Model); degree day model

Online: 28 June 2023 (09:39:34 CEST)

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During the dry season, glaciers contribute significantly to the water supply downstream, especially in areas with seasonal rainfall. It is important to have physical-based glacier models, which are more advanced in quantifying the future dynamics of glaciers and melt distribution. Toward this purpose, an investigation of different numerical modeling tools and their approach is conducted and planned further to incorporate a glacier module into a spatially distributed model called mHM (Mesoscale Hydrological Model, mhm-ufz.org). An open-source tool called MATILDA (Modeling Water Resources in Glacierized Catchments) is used beforehand to implement the glacier entities to the application catchment Maipo Basin in Chile. Due to limited time availability and source of data, the glacier melt of the MATILDA model is integrated into the mHM model to see what the implications would be if the glacier module was implemented from scratch in mHM. The analysis of the glacier hydrology resulting from the Maipo-Glacier model was carried out by comparing the modeled glacier flows with the total observed flows. To assess the credibility of the models, the results are compared based on three goodness-fit measures, specifically r^2Coefficient of Determination), NSE (Nash-Sutcliffe Efficiency), and KGE (Kling-Gupta Efficiency). Application of the mHM model in the Maipo basin in Central Chile is performed by using prepared input datasets, showing that the approach is viable as evidenced by a Kling-Gupta Efficiency of 0.80 and Nash-Sutcliffe Efficiency of 0.70 from the starting periods of 1950 to 2020. Overestimation by the mHM model occurs during the late summer season, particularly when temperature decreases. The MATILDA model is used on glacier melt distribution, forcing data is prepared from regional datasets, and a glacier profile is constructed from ice thickness datasets. According to the model, the average KGE result for the years 2012–14 and 2015–18 was respectively 0.44 and 0.41. Glacier melt produced by Matilda is in the range of 58-68 % of the total runoff and the glacier area decreased by 22-23% during the simulation period from 2012-14 and 2016-2018. A pilot sub-basin Olivares is used in the coupling mHM model with initializing MATILDA glacier melt. The new model is underestimated during the seasonal transition in the initial days of the simulation. A considerable portion of the ablation period might be missed as a result of the initial storage quality, true glacier extent, and height distribution being understated. As a conclusion, the mHM Model was capable of predicting runoff well in a mountainous region and could also serve as a monitoring tool for watershed management. There are differences in results between the two models because of the different spatial resolutions and methodologies. MATILDA have a glacier retreat routine that gives better result for the glacier characteristics such as. A new glacier dynamics model needs to be implemented in the future to develop intermediate complexity, bridge catchment, and glacier scales after using the mHM, MATILDA, and mHM with MATIDLA model for analysis of glacier and highlighting the model's deficiencies in the initial period of simulative assessments.

Preprint ARTICLE | doi:10.20944/preprints202303.0519.v1

Spatial-Temporal Distribution Characteristics and Interrelationship of Sulfur and Iron Compounds in Sediments: A Model Study in the Closed-Section of Mikawa Bay, Japan

Mitsuyasu Waku, Ryota Sone, Tetsunori Inoue, Toshiro Ishida, Teruaki Suzuki

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: dissolved sulfide; iron; hypoxia; buffering capacity; environmental restoration; coastal waters; Mikawa Bay; dead zone

Online: 30 March 2023 (02:58:33 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202305.0762.v1

Scale Dependence of Errors in Snow Water Equivalent Simulations using ERA5 Reanalysis over Alpine Basins

Susen Shrestha, Mattia Zaramella, Mattia Callegari, Felix Greifeneder, Marco Borga

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: TOPMELT; ERA5; SWE; Drizzle; Bias Adjustment

Online: 10 May 2023 (14:31:50 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202306.0768.v1

UAV-based Optical Methods to Estimate the Flow of Temporary Streams and Evaluate their Environmental Status

Paschalis Koutalakis, Mairi Danai Stamataki, Ourania Tzoraki

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: environmental flow; intermittent flow; Mediterranean conditions; optical protocol; surface velocity; temporary streams; unmanned aerial vehicles

Online: 12 June 2023 (05:12:27 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202305.1502.v1

Hydrothermally Synthesized ZnMgAl-Layered Double Hydroxide and Rice Husk Biochar Composites for Cu(II) and Pb(II) Ions Removal From Synthetic Wastewater

Muhammad Shafiq, Abdulrahman Ali Alazba, Muhammad Tahir Amin

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: Batch adsorption; Langmuir isotherm; LDH/RHB; pseudo second-order

Online: 22 May 2023 (10:35:44 CEST)

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The efficiency of a new composite material of the layered double hydroxide (LDH) of ZnMgAl and rice husk biochar (RHB) for the removal of Cu(II) and Pb(II) ions from synthetic wastewater was investigated in this study. The images of scanning electron microscope showed extremely fine crystalline LDH particles decorated on the rough surface of the RHB while the succesful formation of the composite adsorbent (LDH/RHB) was confirmed by the corresponding energy dispersive X-ray and the Fourier-transform infrared spectroscopy. An equilibrium contact time of 30 and 15 min for Cu2+ and Pb2+, respectively, was proposed for the optimum performance of the batch adsorption process. The dose of the LDH/RHB adsorbent was optimized at 0.4 g yielding maximum adsorption capacities of 117 and 124 mg g-1 for Cu2+ and Pb2+, respectively, with corresponding maximum removal efficiencies of nearly 94% and 99%. The initial meta concentrations was optimized at 50 or 60 mg L-1 corresponding to maximum removal efficiencies or adsorption capacities. For the changing initial metal’s concentration, the removal efficiencies remained unchanged for up to 50 mg L-1 and decreased by about 50% by increasing the initial concentrations from 50 to 100 mg L-1. The adsorption capacities observed a linear increasing trend by increasing the initial concentrations from 5 to 60 mg L-1 and remained unchanged afterward up to 100 mg L-1. A solution pH of 6.0 yielded optimum results with an increasing trend in adsorption capacities and percentage removal by changing the solution pH from 2.0 to 7.0. Based on the best-fit of the pseudo second-order kinetic model to the experimental data, the chemisorption was suggested to be the controlling mechanism of adsorption. The fitting of the Langmuir model suggested a monolayer sorption of Cu2+ and Pb2+ in addition to a heterogeneous adsorption as supported by the fitting of the Temkin isotherm. The application of the Dubinin–Radushkevich isotherm proposed a physical adsorption (mean free energy of adsorption less than 8 kJ mol−1) of both heavy metal ions on the surface of the LDH/RHB adsorbent.

Preprint ARTICLE | doi:10.20944/preprints202307.1549.v1

CLIMATE CHANGE IMPACT ON THE WATER RESOURCE OF ARBA RIVER CATCHMENT, AWASH RIVER BASIN, ETHIOPIA

Hailu Mosisa Chala, Wegayehu Demise Tegene, Abera Girma Niguse

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: climate change; water potential; RCM; Arba River; Ethiopia

Online: 24 July 2023 (10:57:56 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202207.0076.v1

Water Consumption Habits of a North-Western Turkish Community: A Cross-Sectional Study

Ünal Ayranci, Merve sezer Yildiz, Ahmet Demirci

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: water consumption; drinking water; consumer preference; water usage purposes

Online: 5 July 2022 (13:45:20 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202307.0244.v1

Estimation of Reference Evapotranspiration in a Semi-Arid Region of Mexico

Gerardo Delgado-Ramírez, Martín Alejandro Bolaños-González, Abel Quevedo-Nolasco, Adolfo López-Pérez, Juan Estrada-Ávalos

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: NASA-POWER platform; empirical equations; reanalysis data; meteorological data

Online: 4 July 2023 (13:59:00 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202306.1016.v1

Water Quality Class Modeling Using Machine Learning Algorithms at Roodeplaat Dam, South Africa

Kassahun Birhanu Tadesse, Megersa Olumana Dinka

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: Decision Tree; linear regression; Naïve Bayes; Python; Support Vector Machine

Online: 14 June 2023 (08:40:50 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202303.0495.v1

Evaluation of Various Generalized Pareto Probability Distributions for Flood Frequency Analysis

Cristian Gabriel Anghel, Cornel Ilinca

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: floods; frequency analysis; extreme value statistics; Pareto; Wakeby; estimation parameters; approximate form; method of ordinary moments; method of linear moments

Online: 29 March 2023 (02:29:25 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202306.1272.v1

Visible-Light-Induced Photocatalytic Degradation of Rhodamine B Dye Using CuS/ZnS P-N Heterojunction Nanocomposite under Visible Light Irradiation

Rachel Mugumo, Emmanuel Ichipi, Shepherd M. Tichapondwa, Evans M. Nkhalambayausi Chirwa

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: CuS/ZnS; photocatalytic degradation; p-n heterojunction; thermal decomposition; one-pot combustion; rhodamine B dye; visible light irradiation

Online: 19 June 2023 (03:31:46 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202304.1039.v1

Circular Economy Model Through Phosphorus Recovery to Obtain Struvite from Sewage Sludge

Javier Cañas, Silvia Álvarez-Torrellas, Blanca Hermana, Juan García

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: Circular economy; phosphorus; struvite; valorization; wet oxidation.

Online: 27 April 2023 (04:40:57 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202304.0198.v4

Elementary Steps in Steady State Kinetic Model Approximation for the Homo-Heterogeneous Photocatalysis of Carbamazepine

Giora Rytwo, Yuval Shahar

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: carbamazepine; advanced oxidation process; pseudo-order; rate law; half life time; elementary steps; steady-state approximation

Online: 15 May 2023 (03:36:34 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202305.0490.v1

Ant Colony Based Artificial Neural Network to Predict Spatial and Temporal Variation in Multiple Groundwater Quality Parameters

Bhavya Ravinder, Lakshmanan Elango

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: Artificial neural network; Ant colony optimization; Groundwater quality; Prediction

Online: 8 May 2023 (09:18:47 CEST)

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Preprint BRIEF REPORT | doi:10.20944/preprints202401.0012.v1

A Comparative Evaluation of eDNA Metabarcoding Primers in Fish Community Monitoring in the East Lake

Yiwen Li, Minzhe Tang, Suxiang Lu, Chengchi Fang, Fan Xiong, Honghui Zeng, Shunping He

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: Environmental DNA; Metabarcoding; Fish Biodiversity; East Lake

Online: 3 January 2024 (02:12:50 CET)

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Preprint REVIEW | doi:10.20944/preprints202309.0447.v1

Municipal Solid Waste Fly Ash-Derived Zeolites as Adsorbents for the Recovery of Nutrients and Heavy Metals – a Review

Christian Vogelsang, Muhammad Umar

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: waste-as-resource; zeolite-precursor; sorption; surface-modified zeolites; ammonium; phosphate; reuse; regeneration

Online: 7 September 2023 (05:03:31 CEST)

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Preprint REVIEW | doi:10.20944/preprints202309.0283.v1

The Behaviour of Polymeric Pipes in Drinking Water Distribution System. Comparison with Other Pipe Materials

Daniela Simina Stefan, Magdalena Bosomoiu, Georgeta Teodorescu

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: tap water; polymeric pipe; concrete pipe; iron pipe; lead pipe; leaching; corrosion.

Online: 5 September 2023 (11:53:49 CEST)

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Preprint BRIEF REPORT | doi:10.20944/preprints202303.0427.v1

Characterization and Assessment of Water Quality using Statistical Analysis for Tiruchirappalli City, Tamil Nadu, India

Swagata Chakraborty, J. Fowmitha Banu, K. Sridhar, P. Vignesh, P. Kalaipriya, M. Govindaraju

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: Correlation study; Regression analysis; Physicochemical parameters; quality of water; Electrical conductivity

Online: 24 March 2023 (07:50:50 CET)

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Preprint ARTICLE | doi:10.20944/preprints202304.0983.v1

Hydrological Modeling in the Upper Lancang-Mekong River Basin Using Global and Regional Gridded Meteorological Reanalyses

Shixiao Zhang, Yang Lang, Furong Yang, Xinran Qiao, Xiuni Li, Yuefei Gu, Qi Yi, Lifeng Luo, Qingyun Duan

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: CMADS; CFSR; meteorological variables; hydrological simulations; SWAT+; upper Lancang-Mekong River Basin

Online: 26 April 2023 (11:29:40 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202309.1660.v1

Decreasing access to water and coping strategies to shortage in informal settlements of Calabar, Nigeria.

Julius Uti Nchor, Leonard Edadi Ukam

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: water; water accessibility; water system; resilient; coping strategies; households.

Online: 25 September 2023 (08:15:25 CEST)

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Working Paper ARTICLE

Resistance to Change and Perceived Risk as Determinants of Water-Saving Intention

Francisco J. Sarabia-Sánchez, Isabel P. Riquelme, Juan Manuel Bruno

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: water saving; resistance to change; perceived risk; intentions; Sustainable Development Goal 12

Online: 19 April 2021 (14:25:22 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202310.0862.v1

A Comparative Analysis of Machine Learning Techniques for National Glacier Mapping: Evaluating Performance Through Spatial Cross-Validation in Perú.

Marcelo Bueno, Brigitte Macera, Nilton Montoya

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: spatial modeling; machine learning; glacier mapping; glacier retreat; climate change; spatial autocorrelation; spatial cross-validation

Online: 13 October 2023 (09:45:37 CEST)

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Preprint REVIEW | doi:10.20944/preprints202402.0970.v1

Generation Mechanism of Hydroxyl Radical in Micro Nano Bubbles Water and Its Prospect in Drinking Water

Tianzhi Wang, Ci Yang, Peizhe Sun, Mingna Wang, Fawei Lin, Manuel Fiallos, Khu Soon-Thiam

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: micro nano bubbles; hydroxyl radical; drinking water security; pollutants; biofilm; engineering application

Online: 19 February 2024 (14:51:04 CET)

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Micro nano bubbles (MNBs) can generate ·OH in situ, which provides a new idea for the safe and efficient removal of pollutants in water supply systems. However, the difficulty in obtaining stable MNBs causes the low efficiency of ·OH generation, which makes the inability to guarantee the removal efficiency of pollutants. This paper reviews the application research of MNBs technology in water security from three aspects: the generation process of MNBs in water, the generation rule of ·OH during MNBs collapse, and the control mechanism of MNBs on pollutants and biofilms. We found that MNBs generation methods are divided into chemical and mechanical (about 10 kinds) categories, and the instability of bubble size restricts the application of MNBs technology. The generation of ·OH by MNBs is affected by pH, gas source, bubble size, temperature, external stimulation. And pH and external stimulus have more influence on ·OH generation in situ than other factors. Adjusting pH to alkaline or acidic conditions and selecting ozone or oxygen as the gas source can promote the ·OH generation. MNBs’ collapse also releases a large amount of energy, which the temperature and pressure can reach 3000K and 5Gpa respectively, making it efficient to remove ≈90 % of pollutants (i.e., trichloroethylene, benzene, and chlorobenzene). The biofilm can also be removed by physical, chemical, and thermal effect. MNBs technology also has great application potential in drinking water, which can be applied to improve water quality, optimize household water purifiers, and enhance the taste of bottled water. Under the premise of safety, let people of different ages taste, finding that compared with ordinary drinking water, 85.7 % of people think MNBs water is softer, 73.3 % of people think MNBs water is sweeter. This further proves that MNBs water has a great prospect in the drinking water application. This review provides innovative theoretical support for solving the problem of drinking water safety.

Preprint REVIEW | doi:10.20944/preprints202310.0689.v1

Recent Advance on the Effects of Biochar on Constructed Wetlands: Treatment Performance and Microorganisms

Guanlong Yu, Jiajun Huang, Huifang Chen, Jundan Chen, Shiyong Ge, Jiaxin Liu, Dian Zhen

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: constructed wetlands; biochar; enzyme activities; microbial communities

Online: 11 October 2023 (07:32:26 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202305.0802.v1

Turbulence Kinetic Energy and High-order Moments of Veloc-ity Fluctuations of Flows in the Presence of Submerged Vegetation in Pools

Mohammad Reza Tabesh, Parsa Parvizi, Hossein Afzalimehr, Jueyi Sui

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: Vegetation canopy; Pool; Reynolds shear stresses; Skewness coeficients.; Turbulent kinetic energy

Online: 11 May 2023 (05:36:01 CEST)

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In the presence of aquatic plants in streams, a variety of flow structures have been reported. Re-sults of earlier investigations indicated that the hydrodynamic features of flows in rivers, and streams are influenced by a wide range of submerged and non-submerged vegetation. In the pre-sent study, eight experiment runs were conducted in two artificial pools built in a laboratory flume to assess the flow structures across vegetation cover. The slopes for entrance and exit sec-tions of these two pools are of 5 and 10 degrees, respectively. A patch of artificial grass covered the entire pool area over the gravel bed. The effect of stream flow velocity was investigated by considering two aspect ratios of 2 and 2.7. Also, distributions of flow velocity, Reynolds normal and shear stresses, turbulence intensities, turbulent kinetic energy (TKE), and higher-order mo-ments of velocity fluctuations have been investigated. By means of quadrant analysis, it is found that the skewness coefficients of velocity profiles are significant parameters to evaluate. Based on skewness values for the bursting processes, along the pool entrance section with a smaller slope, the contribution of sweep motion occurs in a more restricted zone above the canopy, and this im-plies that the ejection motion occurs in a pool entrance section with a higher slope. Immediately above the vegetation canopy, the dominant process is the sweep motion of bursting events. Whereas, at the upstream boundary of the vegetation patch, an outward motion with slightly pos-itive value occurs; and around the downstream boundary of the vegetation patch, the isotropic turbulence appears at the boundary of the vegetation and gravel bed. Over the vegetation canopy in the pool, less mixing eddies result in lower Reynolds shear stress values, and thus the turbulent flow becomes weak with lower turbulent kinetic energy (TKE). Because of the shallow flow in an artificial channel with an aspect ratio less than five and the availability of vertical non-zero ve-locity components, secondary currents become stronger in the channel. Consequently, there is a divergence from a linear dispersion of Reynolds shear stress.

Preprint ARTICLE | doi:10.20944/preprints202306.1919.v2

Unintentional Recharge of Aquifers from Dams and Dykes in Spain. A GIS-Based Approach to Determine a Fractional Volume

Enrique Fernández Escalante, José David Henao Casas, Carlos Moreno de Guerra Per, María Dolores Maza Vera, Carles Moreno Valverde

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: Managed Aquifer Recharge; artificial recharge; unintentional recharge; transverse dams; dykes; infiltration; Spain

Online: 28 June 2023 (16:14:36 CEST)

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Conducting an accurate hydrological water balance at the regional and country-wide scales is paramount to assessing available water resources and adequately allocating them. One of the main components of these balances is the anthropogenic recharge of groundwater either intentionally, through managed aquifer recharge (MAR), or unintentionally, where infiltration from dams and dykes can play a significant role. In Spain, proper management of water resources is critical due to the arid to semiarid conditions prevalent in most of the territory and the relevance of water resources for maintaining a robust agricultural sector. Spanish Previous work has estimated country-wide recharge from MAR at 150-280 Mm3/year. Recently, water authorities have pointed out that, according to hydrological water balances, the total volume from "unintentional recharge" from water courses may exceed 500 Mm3/year. The present research aims to present a new inventory of transverse structures in Spain and use it to estimate country-wide unintentional recharge. The inventory, compiled by the Spanish Ministry for the Ecological Transition and the Demographic Challenge, has more than 26,000 structures and includes construction characteristics, which allow for estimating the wet perimeter and the infiltration area. Structural data from the inventory was crossed through map algebra with thematic layers, such as lithology, permeability, the digital elevation model, the average groundwater levels, etc., in a GIS environment to arrive at the objective. Different analytical formulas to compute infiltration from small dams and dykes were also employed. The resulting volume of unintentional recharge from transverse structures in Spain is about 800 Mm3/year. This quantity can help close the hydrological balance at the national and river basin levels. Furthermore, this figure provides an order of magnitude for anthropogenic recharge at a national scale, which is difficult to obtain.

Preprint ARTICLE | doi:10.20944/preprints202305.0148.v1

Understanding Saltwater Origins and Mechanisms in the Coastal Aquifers of Da Nang Area (Central Vietnam)

Thao Bach Nguyen, Nhan Duc Dang, Bang Duc Dao

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: saltwater intrusion; groundwater modeling; sustainable groundwater development; Coastal aquifers; Surface water interaction; Water resource management

Online: 3 May 2023 (12:39:01 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202305.1945.v1

Groundwater Level Trend Analysis and Prediction in the Upper Crocodile (West) Basin, South Africa

Tsholofelo Mmankwane Tladi, Julius Musyoka Ndambuki, Thomas Otieno Olwal, Sophia Sudi Rwanga

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: Rainfall; Groundwater; Mann-Kendall; Upper Crocodile; Characterisation; Cross-correlation; Autocorrelation; lag time; Gradient Boosting; Machine Learning

Online: 29 May 2023 (02:19:56 CEST)

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Preprint REVIEW | doi:10.20944/preprints202402.1302.v1

Nutrient Removal and Recovery from Municipal Wastewater

Jan Derco, Andreja Žgajnar Gotvajn, Patrícia Guľašová, Angelika Kassai, Nikola Šoltýsová

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: municipal wastewater; nutrients; removal; secondary; tertiary; treatment

Online: 23 February 2024 (08:33:12 CET)

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Preprint ARTICLE | doi:10.20944/preprints202305.0811.v1

Evaluation of Rainfall Products in Semi-arid Areas: Application to the Southeast of the Republic of Djibouti and a Focus on the Ambouli Catchment

Golab Moussa Omar, Jean-Emmanuel PATUREL, Christian Salles, Gil Mahé, Mohamed Jalludin, Frederic Satgé, Mohamed Ismail Nour

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: Djibouti; rainfall; precipitation datasets; categorical metrics,; quantitative metrics; reliability; rain gauges

Online: 11 May 2023 (07:18:45 CEST)

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The Republic of Djibouti is a small country in the Horn of Africa and, as in most developing countries, rain gauges are sparse and data are scarce. This study aims to report on the reliability of gridded precipitation datasets (P datasets) across the Republic of Djibouti through direct comparisons with rain gauge measurements from the annual to the daily time scales. Our specific objective is to be able to use such products in the context of hydrological modeling at a daily time step. Given the scarcity of available data in the Republic of Djibouti, our study was carried out on two time windows (1980-1990 and 2008-2013) and two gauge networks with different spatial resolutions: the southeast of the Republic of Djibouti (5000 km2) and the Ambouli catchment (794 km2), which drains the city of Djibouti. The reliability of these products is analyzed with quantitative metrics and categorical metrics, exclusively at a daily time step for the latter. The performance of the P datasets degrades from the annual time scale to the daily time scale. Even though the same products exhibit the best performance at the various time scales, the performance of most of the products differs from one spatial scale to another. Our results demonstrate the importance of the temporal and spatial windows, as the same products can perform differently according to the scale. For all the spatiotemporal scales, the most reliable product is MSWEP v.2.2. This P dataset is derived from a combination of satellite products (multiple sensors such as infrared and passive microwave), reanalysis products, and rain gauge observations. A strong discrepancy between rain gauge observations and P datasets is revealed according to the categorical metric at a daily time step. The analysis of rainfall events triggering runoff, using a 10 mm rainfall threshold showed that the most efficient products were unable to accurately detect such events at a daily time step, with a significant underestimation of rainfall events higher than 10 mm. None of these products, even the most reliable, can be used for a calibration/validation of a hydrological model at a daily time step.

Preprint COMMUNICATION | doi:10.20944/preprints202307.0598.v1

A Glass-Fiber Optic Turbidity Sensor for Real-Time In-Situ Water Quality Monitoring

Chi-Thanh Vu, Amir Ahmadi Zahrani, Lingze Duan, Tingting Wu

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: optical sensors; fiber optics; turbidity measurement; drinking water; real-time detection

Online: 10 July 2023 (10:12:03 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202310.0272.v1

Biopolymer Chitosan-Activated Charcoal Adsorptive Composite Material: A Feasible Approach to Methylene Blue Dye Removal from Water

Arun Kumar Shukla, Javed Alam, Janne Ruokolainen, Kavindra Kumar Kesari

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: activated charcoal; chitosan; biopolymer; methylene blue; dye removal

Online: 5 October 2023 (10:15:03 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202305.1158.v1

Optimal Pressure Sensor Deployment for Leak Identification in Water Distribution Networks

Guang Yang, Hai Wang

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: leak identification; pressure sensor deployment; water distribution networks

Online: 16 May 2023 (10:53:02 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202305.2203.v1

Disinfection of Digestate Effluents Using Photocatalytic Nano-Filtration

Afroditi G. Chioti, Georgia Sarikaki, Vasiliki Tsioni, Eleni Kostopoulou, George Em. Romanos, Polycarpos Falaras, Themistoklis Sfetsas

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: disinfection; indicator pathogens; TiO2 photocatalysis; photocatalytic nanofiltration reactor; membrane filtration; anaerobic digestion; liquid digestate

Online: 31 May 2023 (08:36:30 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202306.0207.v1

Improvement of MBBR Performance by the Addition of 3D-Printed Biocarriers Fabricated with 13X and Bentonite

Dimitra C. Banti, Petros Samaras, Afroditi G. Chioti, Anastasios Mitsopoulos, Michail Tsangas, Antonis Zorpas, Themistoklis Sfetsas

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: moving bed biofilm reactor; K1 biocarriers; 3D-printed biocarriers; biofilm; SMP; EPS; activated sludge; wastewater treatment

Online: 2 June 2023 (13:44:32 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202311.0586.v1

Exploration of Microalgae-Activated Sludge (Mas) Growth Performance in Lab-Scale Photobioreactor at Outdoor Environmental Condition for Wastewater Biotreatment

Abraham Olamilekan James, Abayomi Oluwatobiloba Bankole, Caroline Moço Erba Pompei, Gustavo Alencar Silva Almeida Dantas, Graziele Ruas, Gustavo Henrique Ribeiro Da Silva

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: Microalgae-Activated Sludge; Nutrients recovery; Pollutant removal; Total Coliform and Escherichia coli removal

Online: 9 November 2023 (07:45:01 CET)

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Preprint ARTICLE | doi:10.20944/preprints202307.1713.v1

Experimental Study on Hydrodynamics of Open Channel with Algae Attached to the Side Wall

Li Pan, Lianjun Zhao, Mingwu Zhang, Zhiqiang Lai

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: oblique side wall of open channel; epipelic algae; flume experiment; prototype observation

Online: 25 July 2023 (11:54:18 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202308.1039.v1

Suitability of Coastal Reservoirs for Stormwater Harvesting in South Africa

Reitumetse Mokgele, And John Okedi

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: Coastal reservoirs; Stormwater harvesting; South Africa.

Online: 14 August 2023 (11:14:03 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202307.0653.v1

Exploring Cobalt Doping Methods for Enhancing Blue-TiO2 Catalyst Efficiency

Roberta Irodia, Camelia Ungureanu, Veronica Sătulu, Vasilica Mihaela Mîndroiu

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: Nanostructures; Blue-TiO2 nanotubes; Antimicrobial; Antibiotics; Photocatalytic

Online: 11 July 2023 (09:25:55 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202305.2190.v1

Advanced Electrochemical Degradation of Organic Pollutants From Water Using Sb-Doped SnO2/Ti Anode and Assisted by Granular Activated Carbon

Anamaria Baciu, Corina Orha, Radu Nicolae, Mircea Nicolaescu, Sorina Ilies, Florica Manea

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: advanced water treatment; electrochemical filtering; doxorubicin; mesoporous Sb-doped SnO2 electrode; activated carbon; particulate electrode

Online: 31 May 2023 (07:52:28 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202401.1995.v1

Spectrophotometry in PFOA Research: Preliminary Results for Fate Analysis Studies in a Small Research Laboratory

David Nadler

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: spectrophotometry; PFOA; UV; oxidation

Online: 29 January 2024 (06:44:57 CET)

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Preprint ARTICLE | doi:10.20944/preprints202309.0123.v1

Discovery of Environmental Nanoparticles in a Mineral Water Spring: A New Form of Elements in Mineral Water

Rui Liu, Zhiqiang Zhao, Minghui Lv, Hongwei Wang, Lixia Li, Shenting Gang, Lei Zuo, Peng Zhang, Yaqin Wang, Changsuo Li, Qianqian Lu

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: water quality; nanoparticle tracking analysis; high-resolution transmission electron microscopy; weathering byproducts; water safety

Online: 4 September 2023 (15:24:27 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202306.0284.v1

Automatic River Planform Recognition Tested on Chilean Rivers

Andrea Gianni Cristoforo Nardini, Francisca Salas, Zoila Carrasco, Noelia Valenzuela, Renzo Rojas, José Vargas-Baecheler, Santiago Paul Yepez

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: River Planform; River Reaches; Automatic Identification; Geomorphics Elements and Units; Biobío Basin

Online: 5 June 2023 (09:02:24 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202311.1703.v1

Digitalization in Small-Scale Urban Recirculation Aquaculture: Data Analytics in Sub-Saharan Africa

Ujunwa Victoria Aghaji, Emmanuel Olatunbosun Benjamin, Gertrud Buchenrieder

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: Recirculating aquaculture system; water quality; (peri-)urban farming; Nigeria; sub-Sahara Africa

Online: 27 November 2023 (12:10:41 CET)

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Preprint ARTICLE | doi:10.20944/preprints202308.1663.v1

Colorimetric Quantification for Residual Poly- DADMAC in Water Treatment

Ilil Levakov, Ido Maor, Chen Barak, Yael Kirshenbaum, Giora Rytwo

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: poly-DADMAC; fast green; colorimetric quantification; polyelectrolyte; water treatment

Online: 24 August 2023 (03:38:22 CEST)

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Environmental and Earth Sciences