Analysis of Instantaneous Unit Hydrograph Parameters

Abstract

The runoff measured at the basin outlet, when plotted against time gives the hydrograph. If the duration of effective rainfall approaches
zero, the hydrograph may be called as an instantaneous unit hydrograph. It is generally abbreviated as IUH. The IUH has been studied in
details to find out the sensitivity of scalar and shape parameters. Method of momentum is used to derive scalar and shape parameters. The
scalar parameter has effect for peak discharge and shape parameter is sensitive for flow duration.