Abstracts
Groundwater is one of the important sources of drinking water in Delhi, and is identified as one of the threatened water resources due to degrading quality and quantity. Spatial variation in groundwater quality and depth with respect to different land covers is considered for the present study during pre and post monsoons to study the effects of land covers on groundwater quality and depth. Groundwater quality under three different land covers and settlement area was studied. Based on physico-chemical analysis, protected forest area is found to have most suitable groundwater for drinking purpose, with water available at maximum depth of more than 40 mbgl. Trees outside forest have minimum groundwater depth but maximum values for EC, TDS, hardness, calcium, magnesium and chloride, making it unsuitable for drinking. Groundwater quality and depth vary significantly with different land covers but seasonal variation is not found significant by ANOVA. Piper diagram suggests that Delhi’s groundwater is dominated by calcium, magnesium and chloride.
Keywords :Groundwater, Delhi, land use/cover, monsoon.
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