The Central Water Commission (CWC) has referred to extreme rainfall that occurred over two intense spells last month in Kerala as a “Standard Project Storm (SPS)”.
About:
Standard Project Storm (SPS) means the heaviest rainstorm that has occurred in a region as per rainfall records analysed through a hydro-meteorological approach.
Technically, it is a storm which has occurred over an area, with the maximum depth in that area. For determining it, experts look at historical rainfall records, for all storms in the region and determine the depth and maximum area that it affected in that period.
The ‘Probable Maximum Precipitation’ for different basins provides the historical rainfall records.
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