AGGLOMERATION OF ARSENIC LINK TO RAIN WATER HARVESTING IN WEST BENGAL CONSIDERING POPULATION AS FUNCTION

As many districts in West Bengal face the problem with arsenic in drinking water, so alternative arrangement for drinking water is necessary for those specific districts. For potable water, people mostly depend on the groundwater reserve. However, with the increasing population, groundwater level and its quality are reducing rapidly. Moreover, there is a vulnerability of arsenic content. Some regions are rich in groundwater but its high arsenic concentration makes it non-potable whereas other regions which are free of arsenic, lack sufficient groundwater. Hence, this paper focuses on the study of mass rainwater harvesting in-depth to eke out all these problems and find an effective solution. Here we have described the actual rainfall scenario in the Monsoon season (including pre-monsoon and post-monsoon) of West Bengal in comparison to population and arsenic vulnerability. We have analyzed district-wise rainfall data of West Bengal for a particular period using remote sensing and GIS technique. From that, we make some thematic maps for the individual parameters. We have used QGIS software for preparing and a better understanding of the matter. Efforts are given to observe the thematic maps to decide how much this process is beneficial for society.