Water Resource Analysis and Potential Evaluation of Bhima Basin in Maharashtra (GIS Approach)

Abstract

Potential of surface water and ground water resource evaluated and demand on resource figured out at sub catchment level. HEC-HMS software was used for hydrologic modeling taking dynamic canopy for evapotranspiration, SCS curve number for surface loss, constant monthly for base flow and storage-discharge for reservoir consideration. Basin model and curve numbers were generated using ArcGIS (GeoHMS tools). Ground water fluctuation study on 10 years water level data carried out.  Remote sensing imagery was used to ground water prospect zones delineation. Resource potential maps were generated using ArcGIS. Nonagricultural water demand was figured out using projected population of 2030 to generate nonagricultural demand. For finding agricultural demand three zones identified considering area equipped for irrigation for no/one/two times a year. Annual demand using standard delta for those zones considering different cropping pattern was figured out. Demand maps generated for agricultural and nonagricultural demands. Integrated demand-potential analysis was carried out to figure out deficit at sub catchment level and deficit maps were generated. Scenario analysis by upgrading or down grading cropping pattern (i.e. changing current cropping pattern) was also carried out to analyze deficit/surplus of sub catchments and consequently basins. Deficit maps for all case scenarios were generated.