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Helen Baron
UK Centre for Ecology & Hydrology, Wallingford, Oxfordshire OX10 8BB, UK

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Journal article
Published: 29 May 2021 in Sustainability
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There has been renewed interest in the performance, functionality, and sustainability of traditional small-scale storage interventions (check dams, farm bunds and tanks) used within semi-arid regions for the improvement of local water security and landscape preservation. The Central Groundwater Board of India is encouraging the construction of such interventions for the alleviation of water scarcity and to improve groundwater recharge. It is important for water resource management to understand the hydrological effect of these interventions at the basin scale. The quantification of small-scale interventions in hydrological modelling is often neglected, especially in large-scale modelling activities, as data availability is low and their hydrological functioning is uncertain. A version of the Global Water Availability Assessment (GWAVA) water resources 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 average annual simulated streamflow at the outlets of the two sub-catchments and the basin, whereas tanks and check dams have a more significant and time varying effect. The open water surface of the interventions contributed to an increase in evaporation losses across the catchment. The change in simulated groundwater storage with the inclusion of interventions was not as significant as catchment-scale literature and field studies suggest. 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.

ACS Style

Robyn Horan; Pawan Wable; Veena Srinivasan; Helen Baron; Virginie Keller; Kaushal Garg; Nathan Rickards; Mike Simpson; Helen Houghton-Carr; H. Rees. Modelling Small-Scale Storage Interventions in Semi-Arid India at the Basin Scale. Sustainability 2021, 13, 6129 .

AMA Style

Robyn Horan, Pawan Wable, Veena Srinivasan, Helen Baron, Virginie Keller, Kaushal Garg, Nathan Rickards, Mike Simpson, Helen Houghton-Carr, H. Rees. Modelling Small-Scale Storage Interventions in Semi-Arid India at the Basin Scale. Sustainability. 2021; 13 (11):6129.

Chicago/Turabian Style

Robyn Horan; Pawan Wable; Veena Srinivasan; Helen Baron; Virginie Keller; Kaushal Garg; Nathan Rickards; Mike Simpson; Helen Houghton-Carr; H. Rees. 2021. "Modelling Small-Scale Storage Interventions in Semi-Arid India at the Basin Scale." Sustainability 13, no. 11: 6129.

Journal article
Published: 11 January 2021 in Water
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This paper presents a comparison of the predictive capability of three hydrological models, and a mean ensemble of these models, in a heavily influenced catchment in Peninsular India: GWAVA (Global Water AVailability Assessment) model, SWAT (Soil Water Assessment Tool) and VIC (Variable Infiltration Capacity) model. The performance of the three models and their ensemble were investigated in five sub-catchments in the upstream reaches of the Cauvery river catchment. Model performances for monthly streamflow simulations from 1983–2005 were analysed using Nash-Sutcliffe efficiency, Kling-Gupta efficiency and percent bias. The predictive capability for each model was compared, and the ability to accurately represent key catchment hydrological processes is discussed. This highlighted the importance of an accurate spatial representation of precipitation for input into hydrological models, and that comprehensive reservoir functionality is paramount to obtaining good results in this region. The performance of the mean ensemble was analysed to determine whether the application of a multi-model ensemble approach can be useful in overcoming the uncertainties associated with individual models. It was demonstrated that the ensemble mean has a better predictive ability in catchments with reservoirs than the individual models, with Nash-Sutcliffe values between 0.49 and 0.92. Therefore, utilising multiple models could be a suitable methodology to offset uncertainty in input data and poor reservoir operation functionality within individual models.

ACS Style

Robyn Horan; R Gowri; Pawan Wable; Helen Baron; Virginie Keller; Kaushal Garg; Pradeep Mujumdar; Helen Houghton-Carr; Gwyn Rees. A Comparative Assessment of Hydrological Models in the Upper Cauvery Catchment. Water 2021, 13, 151 .

AMA Style

Robyn Horan, R Gowri, Pawan Wable, Helen Baron, Virginie Keller, Kaushal Garg, Pradeep Mujumdar, Helen Houghton-Carr, Gwyn Rees. A Comparative Assessment of Hydrological Models in the Upper Cauvery Catchment. Water. 2021; 13 (2):151.

Chicago/Turabian Style

Robyn Horan; R Gowri; Pawan Wable; Helen Baron; Virginie Keller; Kaushal Garg; Pradeep Mujumdar; Helen Houghton-Carr; Gwyn Rees. 2021. "A Comparative Assessment of Hydrological Models in the Upper Cauvery Catchment." Water 13, no. 2: 151.