Abstract
In this study, site suitability analysis for Groundwater management in river basin has been carried out by constructing runoff harvesting structures like percolation pond and check dam. The site suitability for different groundwater recharge is determined by considering spatially varying parameters like sub basin area, runoff potential, slope and fracture pattern. GIS tool used to store, analyse and integrate spatial and attribute information pertaining to drainage, runoff, slope and fracture. The SCS-CN method used to derive runoff potential in terms of runoff coefficient (ratio between the runoff and rainfall) which is classified into three classes, viz., high (>40%), moderate (20â40%) and low (<20%). IMSD specifications for water recharging /harvesting structures, parameters such as effective storage, and rock mass permeability are considered to augment effective groundwater storage. In GIS software, by using an overlay and decision tree concepts, potential water harvesting sites are identified. The derived sites are field investigated for suitability and implementation. The suitability map provides vision in selecting harvesting structures such as anicut, percolation ponds and check dams. In Luni river basin area 38 check dams and seven percolation ponds found were suitable for groundwater recharging and water harvesting.
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