ESTIMATION OF SEDIMENT YIELD OF A CATCHMENT USING USLE WITH ARCGIS MAPPING

Abstract

One of the most serious issues in India is soil erosion. For a specific duration, it is extremely hard to measure exact soil erosion. On the basis of watershed, numerous tests and hypothetical strategies have been inferred for erosion estimation. For my very river channel of Orissa, India, the strategies include GIS which is utilized for the calculation of residue yield. In this technique, spatial information of Ong catchment is segregated in individual characterized units/cells to analyze features of the catchment. In every unit, net erosion is determined utilizing the Universal Soil Loss Equation (USLE) by deciding different boundaries of unit. The Ong catchment at lower Mahanadi locale is chosen here for the study as the ease of accessibility of desired information at different areas inside watershed zone. Ong catchment has a zone of 5128 km2 of the lower Mahanadi district. By utilizing the factors of USLE, net soil erosion is steered for inference of transport limit residue by the help of different maps obtained through arcGIS. The maps portray the measure of silt through a specific lattice in spatial space, the pixel estimation demonstrates the residue yield at the watershed outlet. By investigation of information of Ong catchment with the technique of Universal Soil Loss Equation, the yearly residue yield of Ong catchment gives great concurrence, being not exactly ± 32% error. Largest sediment yield acquired at Salebhata (Gauging station), which is equivalent to 24.3 ton/hectare/yr.