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ABSTRACT:Water related activity that takes place in one part of a river basin may have consequence in the other part. Any plan related to inter basin transfer of water from a water surplus basin to a deficit basin has to take into account the water availability and demands under the present and future scenarios of water use. Watershed is a hydrologic unit where all stream exit from the common outlet. In the present study, Tapi subcatchment area (Burhanpur watershed) located in inter-state basin of Madhya Pradesh and Maharashtra, India, is selected for the estimation of surface runoff using SWAT model. The SWAT works in conjunction with Arc GIS 9.3. Various parameters Digital Elevation Model (DEM), slope derived from DEM, Landuse/Landcover (LULC) and NBSSLUP soil data and temporal data for temperature and precipitation was used as input for the model to predict runoff at the catchment outlet. The model was run from the year 1992 to 1997. The performance of the model in terms of simulated runoff was evaluated using statistical method and compared simulated monthly flow with the observed monthly flow values from 1992 to 1996 to a significant extent. The coefficient of determination (R 2 ) for the monthly runoff values for 1992 to 1996 was observed to be 0.82, 0.68, 0.92, 0.69.

The groundwater resource in the Kingdom of Saudi Arabia is a non-renewable resource. Geographical information system and remote sensing are proven to be an efficient tool for locating water harvesting and recharge structures by prioritization of sub-watersheds through morphometric analysis. In this study, the watershed prioritization in Asir Province has been assessed by linear, aerial, and relief morphometric parameters. Morphometric analysis has been attempted to prioritize a total of eleven subwatersheds, of which six sub-watersheds in Tathlith Wadi and five sub-watersheds in Bisha Wadi were delineated using digital elevation model (DEM). Advanced space-borne thermal emission and reflection radiometer of 30m resolution DEM has used to generate drainage networks and delineation of subwatersheds using ArcGIS software. The important derived morphometric parameters have computed on the base of already developed mathematical formulae and methods. A novel and quantitative approach based on the compound parameter by using linear and shape parameters of the respective sub-watershed was attempted for its prioritization. The total area of sub-watershed in Wadi Bisha, which lies under high, medium, and low priority is approximately 40%, 20% and 40% respectively. whereas in Wadi Tathlith, the area under high and medium priority is 67% and 33%. The watersheds BSW2 and BSW4 in Wadi Bisha and TSW1, TSW2, TSW3, and TSW5 in Wadi Tathlith would require immediate intervention and efficient action plan for water and soil conservation. The interrelationship between the various morphometric factors of the basin has been studied using a correlation matrix. Further, morphometric factors have been studied in relation to the sub-basins to understand the existing relation between the factors and the sub-basins. The prioritized watersheds were validated using the

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