RUIS - A WEB BASED GEOGRAPHICAL INFORMATION SYSTEM FOR RISHIKESH AREA, INDIA

In this study, we carried out a comparative evaluation of water yield using two approaches, the Lumped Zhang model and the pixel-based approach. Even in pixel-level computations, experiments are made with existing models of some of the involved parameters. The study indicates not only the suitability of pixel-based computations but also clarifies the suitable model of some of the parameters to be used with pixel-based computations to obtain better results.

Geospatial technologies and OIP are promising tools to study the effect of demographic changes and LULC transformations on the spatiotemporal variations in the water quality (WQ) across a large river basin. Therefore, this study could help to assess and solve local and regional WQ-related problems over a river basin. It may help the policy makers and planners to understand the status of water pollution so that suitable strategies could be planned for sustainable development in a river basin.

The SWAT model was used to simulate the water cycle in the ungauged basin of Aluoi, Vietnam. The model was calibrated based on daily river discharge (predicted by regionalization), monthly actual evapotranspiration and yearly crop yield.The results showed that the surface runoff is highest between September and November which resulted in extreme soil erosion and sedimentation. Best Management Practice (BMPs) reduced surface runoff and soil erosion in agricultural lands.