Development of Depth Area Curve for 2019 Storm in the Gandhi Sagar Reservoir

Abstract

Extreme precipitation occurs frequently in some parts or the other in India. This is crucial in the context of the safety of the dam because such storms cause extreme floods. There is a variation of rainfall depths over the area as well as over time. The depth of precipitation decreases from the point of maximum precipitation termed the storm center. From 13th to 16th September 2019 heavy storm occurred in the catchment area of Gandhi Sagar Dam. The center of the storm was different on each day. It caused a threat to the dam because the flood exceeded the capacities of spillways and outlets. Rainfall data were collected covering the whole catchment area of the Chambal River for the period. The isohyets maps were drawn for different durations for the event using the GIS platform. A depth area curve for Chambal River catchment is created for each day as well as the depth area duration curves were drawn for each day.