Version 1
: Received: 7 August 2019 / Approved: 8 August 2019 / Online: 8 August 2019 (11:51:36 CEST)
How to cite:
Dumitriu, D. Relationships between Sediment Transport and Various Hydrological and Hydraulic Characteristics of Flood Events on Trotuș River (Romania). Preprints2019, 2019080103. https://doi.org/10.20944/preprints201908.0103.v1
Dumitriu, D. Relationships between Sediment Transport and Various Hydrological and Hydraulic Characteristics of Flood Events on Trotuș River (Romania). Preprints 2019, 2019080103. https://doi.org/10.20944/preprints201908.0103.v1
Dumitriu, D. Relationships between Sediment Transport and Various Hydrological and Hydraulic Characteristics of Flood Events on Trotuș River (Romania). Preprints2019, 2019080103. https://doi.org/10.20944/preprints201908.0103.v1
APA Style
Dumitriu, D. (2019). Relationships between Sediment Transport and Various Hydrological and Hydraulic Characteristics of Flood Events on Trotuș River (Romania). Preprints. https://doi.org/10.20944/preprints201908.0103.v1
Chicago/Turabian Style
Dumitriu, D. 2019 "Relationships between Sediment Transport and Various Hydrological and Hydraulic Characteristics of Flood Events on Trotuș River (Romania)" Preprints. https://doi.org/10.20944/preprints201908.0103.v1
Abstract
Sediment transport is highly sensitive to flow conditions, showing significant increase during flood events. Based on this principle, this study set out to rank flood events occurring along river Trotuș (Romania) based on the amount of transported sediment and event duration. The 77 flood events recorded from 2000 to 2017 were ranked into 4 classes: type A (4%); type B (16%), type C (14%) and type D (66%). The sediment transport specific for the 4 types of flood events was related to the flow discharge (sediment rating curve and hysteresis effect), the specific stream power and the energy expenditure of these events. More than 60% of the hysteresis loops typical for flood events were clockwise, thus singling out the channel as the main sediment source. Ca. 74% of the total sediment yield was transported at stream power values higher than the 300 Wm-2 threshold, which was exceeded in less than 1% of the investigated timeframe. The changes occurring in the sediment transport rates after major floods show that these events are significant thresholds in the hydrogeomorphic evolution of river channels.
Keywords
flood; sediment transport; sediment rating curve; hysteresis loop; stream power; maximum flow efficiency; energy generated by the flood.
Subject
Environmental and Earth Sciences, Environmental Science
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.