Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Modelling Small-scale Storage Interventions in Semi-Arid India at the Basin Scale

Version 1 : Received: 26 March 2021 / Approved: 29 March 2021 / Online: 29 March 2021 (11:22:07 CEST)

A peer-reviewed article of this Preprint also exists.

Horan, R.; Wable, P.S.; Srinivasan, V.; Baron, H.E.; Keller, V.J.D.; Garg, K.K.; Rickards, N.; Simpson, M.; Houghton-Carr, H.A.; Rees, H.G. Modelling Small-Scale Storage Interventions in Semi-Arid India at the Basin Scale. Sustainability 2021, 13, 6129. Horan, R.; Wable, P.S.; Srinivasan, V.; Baron, H.E.; Keller, V.J.D.; Garg, K.K.; Rickards, N.; Simpson, M.; Houghton-Carr, H.A.; Rees, H.G. Modelling Small-Scale Storage Interventions in Semi-Arid India at the Basin Scale. Sustainability 2021, 13, 6129.

Journal reference: Sustainability 2021, 13, 6129
DOI: 10.3390/su13116129

Abstract

Recently, there has been renewed interest in the performance, functionality, and sustainability of traditional small-scale storage interventions (check dams, farm bunds and tanks) used across India for the improvement of local water security. The Central Groundwater Board of India is en-couraging the construction of such interventions for the alleviation of water scarcity. It is of critical importance to understand the hydrological effect of these interventions at basin scales to maximise their effectiveness. The quantification of small-scale interventions in hydrological modelling is often neglected, especially in large-scale modelling exercises. A bespoke version of the GWAVA model was developed to assess the impact of interventions on the water balance of the Cauvery Basin and two smaller sub-catchments. Model results demonstrate that farm bunds appear to have a negligible effect on the estimated average annual simulated streamflow at the outlets of the two sub-catchments and the basin whereas tanks and check dams have a more significant effect. In-terventions generally were found to increase evaporation losses across the catchment. The model adaption used in this study provides a step-change in the conceptualisation and quantification of the consequences of small-scale storage interventions in large- or basin-scale hydrological models.

Keywords

semi-arid hydrology, small-scale storage, checkdams, tanks, farm bunds, Cauvery, GWAVA

Subject

EARTH SCIENCES, Environmental Sciences

Comments (0)

We encourage comments and feedback from a broad range of readers. See criteria for comments and our diversity statement.

Leave a public comment
Send a private comment to the author(s)
Views 0
Downloads 0
Comments 0
Metrics 0


×
Alerts
Notify me about updates to this article or when a peer-reviewed version is published.
We use cookies on our website to ensure you get the best experience.
Read more about our cookies here.