It is envisaged to develop capacity in concerned state and other departments/agencies to process the hydrological data and maintain the database in HIS. The project intends sharing of knowledge (derived hydrological information and related data) among the Institutions in Himalayan eco-system through an interactive website for the study area. Using the processed data and projected future climate scenarios, it is planned to calibrate and validate few hydrological models (SWAT, VIC, SNOWMOD, SPHY, WinSRM etc.) for the selected basin for determining various hydrological components, spatial and temporal water availability at different locations, and relative contributions of snow, glaciers, and rainfall in flow characteristics in present and changed climate conditions.
The project intends to study sediment yield from selected Himalayan catchment under different climate scenarios and its impact on the life of a large reservoir (Tehri) would be assessed. It is planned to assess potentially dangerous glacial lakes for glacial lake outburst flood (GLOF) studies. Isotope techniques are planned to be used for understanding the hydrological processes, to identify the origin and recharge areas of Himalayan spring, and to partition different components of stream runoff at different spatial and temporal scales. Snow cover maps would be generated in the study area for forecasting likely flows in river systems and planning adaptive strategies for scarcity periods. Use of Normalized Difference Snow Index (NDSI) for snow cover delineation is being explored for different sensors, say MODIS, Landsat etc. Web application is being developed using open layers for display of real-time snow cover information in the study area.
A small watershed at the foothill of Himalayas has been heavily instrumented for detailed understanding of hydrological processes (including water balance components, groundwater dynamics, erosion processes, soil moisture variation etc.) in Himalayan environment. In addition, it is planned to assess the impact of snow and glacier-melt on the groundwater dynamics through groundwater observations and sampling. Water quality assessment, monitoring of point and non-point source pollution, adsorption characteristics of sediments, and monitoring of temporal abundance of different aquatic species at selected locations is being done through comprehensive field and laboratory investigations. In addition, it is planned to estimate environmental flows in critical reaches of the study area. Finally, water census and hotspot analysis is being carried out in 100 selected villages to capture various water resources management components.
All the sub-projects are concentrated in the Upper Ganga basin up to Rishikesh except for the glacial lake and GLOF studies which will be carried out in parts of western Himalayas region.More... »