Rainfall Run-off Estimation Using Geomatics and Nrcs Techniques in the Vegavathi Watershed of Palar Basin, South India

Abstract

Water is vital for human life. The sustainable management of this scarce resource has become a challenge today due to the increasing demands on the growing population, increasing urbanization and rapid industrialization combined with increasing agricultural production. The assessment of surface water resources is essential at regular intervals. The main aim of the paper is, to estimate and evaluate the surface runoff in the Vegavathi catchment area in the Palar Basin. The Natural Resource Conservation Service (NRCS) method is useful for calculating the flow volume from the land surface meets in the river or streams. The estimation of direct precipitation is always efficient, but not possible for most of the situation in the desired time. The use of geomatics, i.e., remote sensing and GIS technology, can be useful in overcoming the problem in traditional estimation methods. Attention was given to derive land use classes from satellite data of 2017 and hydrological soil group. The NRCS method is used for the flow estimation, the parameters such as slope, land use, etc.