Some Hydrometeorological Aspects of an Unprecedented Rainstorm in the Indian Desert

Abstract

Probable maximum precipitation (PMP) and rainfall return periods for different duration of spells have been analysed for five districts in western Rajasthan viz. Sirohi, Jalore, Pali, Jodhpur and Barmer using daily rainfall data from 1961 to 1990. Depth-Area-Duration (DAD) analysis of two severe rain storms that occurred during 1990 have been discussed in comparison with past events of the region. Analysis revealed that Barmer region is more prone to flood hazards in comparison to Jodhpur region. This study also brought out that each of these two storms have generated large volume of water which is sufficient to meet the drinking water demand of human and livestock population of the area over 100 years. Development of system for efficient harvesting of'such rainfall events is a need of the region.