Kartic Bera , Pabitra Banik, Aditi Sarkar
Water is a precious necessity for humanity. Yet due to dynamic climatic conditions, in Bengal dry land areas, water table is showing a receding trend. Keeping in view this dictum, the present study has been carried out. The study is based on data and field check, to identify the most suitable site for the planning of rainwater harvesting structures in the area and its hinterland, mainly to surface water purification and increase the groundwater resources for sustainable development. Determination of Rainwater Harvesting (RWH) potential sites’ study uses various GIS inputs which were prepared using satellite images and integrated with weighted overlay techniques in a GIS environment to derive suitable sites for soil and water conservation structures. Analytic Hierarchy Process (AHP) has been applied to normalize the different factors as per their influences. All the factor values were summed up, and the overall site suitability score was computed according to conservation RWH structure suitability. Based on site suitability results, topographic characteristics, and locations for conservation structures, 76 check dams, 12 percolation tanks, 348 ponds, 50 farm ponds, 18 stop dam and 21 reserves were selected for implementation of soil and water conservation structures. They will sustain the productivity of surface water urtication and increase the groundwater resources for future in and around Bengal’s dry-land areas. The outcome of this study June be replicated in an identical terrain condition for sustainable development planning.
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