Performance Curves for Slightly Sloping Basins

Abstract

The comprehensive, mathematical model SRFR in its zero-inertia form, is utilized here for simulation of flow in slightly-sloping basins using various flow and basin parameters. These parameters are combined in dimensionless form for plotting performance curves pertaining to field slopes ranging from 0 to 0.02%. These show the distribution uniformity (DU) resulting from a particular set of input variables. DU is an important and useful tool for describing the performance of slightly-sloping basins. The DU was found to increase with flow rate and application time but decrease with the increase in infiltration rate, length of run and roughness coefficient. Increase in slope does not affect DU for the highK*, but for low K* can yield DU either increasing or decreasing, based on the downstream conditions of the basin. For medium K* and where a downstream stagnant pool of water is absent, increase in slope increases DU.