Development of Simplified Relationship between Rainfall Erosion Indices and Precipitation Indices for Soil Conservation in Hisar, Haryana, India

Abstract

Soil erosion is the functional ability of rainfall to detach the soil particles and simultaneously the susceptibility of soil to resist against raindrop. In this study, an effort was made to develop a relationship between erosion indices and precipitation indices for the study area. The rainfall data of 16 years for the selected durations of 15-60 minute storms was analyzed to evaluate the erosion potential. A highly significant linear correlation was observed between erosion index (EI) and precipitation index (PI) values computed for the durations of 15, 30, 45 and 60 minutes. The obtained correlation coefficient (r) was varied from 0.97 to 0.99. The precipitation index (PI30) for 30 minutes duration also showed significant linear correlation with precipitation index PI15, PI45 and PI60 minutes duration. The equations so developed could be used for the computation of erosion index (EI) values for Hisar region by substituting the corresponding values of precipitation index (PI) as independent variable and without going through the tedious process of computation of kinetic energy. The results could provide a quick idea on erosion potential for planning the general purpose soil and water conservation measures in the study area.