Accordingly to the classification of deserts by U.S Geological Survey (U.S.G.S), Thar is a monsoon desert region. As monsoons cross India in late June/July, it loses moisture on the eastern slopes of the Aravali range. Hence the rains are scanty, though there are bouts of heavy rains, but the rainy days are few. Average rainfall within study area varies from 127.93 mm (approx.) per year, to 280.14 mm (approx.) per year. Further, analysis of rainfall **data** from in past century indicates a drought once in every 2-3 years along with flood situation in monsoon due to heavy rainfall in short spells. (Refer fig. 3)