Spatial distribution of severe rainstorms over India and their associated areal raindepthsSpatial distribution of severe rainstorms over India and their associated areal raindepths

Abstract

Spatial distribution of 97 severe rainstorms of India which occurred during the period 1880 to 1990 was examined, by plotting this data over large-scale base maps of the country , It was found that excepting a few rainstorms, most of these rainstorms, have preferred zones of occurrence. These zones have been demarcated and their boundaries are found to correspond with the orographic boundaries of the region where these zones occur. Also, the isohyetal patterns drawn on the basis of DAD data of these rainstorms for different size areas and durations have shown that within each of the rainstorm zones, there are areas or cells of heavy rainfall which need to be taken care of while transposing rainstorms from one area to another for obtaining design storm estimates.