water on the Earth is sea water, the remaining 2.5% is fresh water of which slightly over two
thirds is frozen in glaciers and polar ice caps. The unfrozen fresh water is mainly found as
groundwater, with only a small fraction present above ground or in the air. Since one of the
main source of water is rainfall. Therefore, proper information on rainfall and its variability in
space and time is required for better watershed planning and management and other …