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

There has been renewed interest in the performance, functionality, and sustainability of traditional small-scale storage interventions (check dams, farm bunds tanks) used within semi-arid regions for improvement local water security landscape preservation. The Central Groundwater Board India is encouraging construction such alleviation scarcity to improve groundwater recharge. It important resource management understand hydrological effect these at basin scale. quantification modelling often neglected, especially large-scale activities, as data availability low their functioning uncertain. A version Global Water Availability Assessment (GWAVA) resources model was developed assess impact on balance Cauvery Basin two smaller sub-catchments. Model results demonstrate that appear have a negligible average annual simulated streamflow outlets sub-catchments basin, whereas tanks check dams more significant time varying effect. open surface contributed an increase evaporation losses across catchment. change with inclusion not catchment-scale literature field studies suggest. adaption this study provides step-change conceptualisation consequences large- or basin-scale models.