Application of DRASTIC and Modified DRASTIC Models for Modeling Groundwater Vulnerability of Malda District in West Bengal

摘要: Groundwater is one of the most important freshwater resources in our daily life. Under background global climate change, untreated rate urbanization, human interferences and policy variations affect change local groundwater quality which very common developing countries like India. Hence, protecting from different types contamination accurate appropriate measures conservation. The main objectives this work are to assess vulnerability Malda district using DRASTIC modified methods. Seven influencing factors depth, net recharge, aquifer material, soil media, topography, impact vadose zone hydraulic conductivity were used complete method, agricultural DRASTIC, land use AHP multi-model approach has been to identify best model. For modeling Land layer was added with other layers. divided into three categories high, moderate low. High-vulnerability zones found northern southern parts, middle part district, low-vulnerability eastern district. model validated ROC curve Friedman test. shows better performance compared models.