STUDY ON ESTIMATION OF SOIL LOSS OF URMODI RIVER BASIN IN MAHARASHTRA USING GEOGRAPHICAL INFORMATION SYSTEMSachin Nandgude, Sangita Shinde and Dilip Mahale
The most common pollutants carried in runoff are sediment and nutrients. Sediment is soil that is carried in water. The soil can come from farm fields, construction sites, logging sites or any bare land. As the water moves across the land, it picks up part of the soil. This soil travels with the water until it reaches a stream, lake or river. Geographical Information System (GIS) was applied to prepare various layers of USLE parameters which interactively estimate soil erosion of Krishna River basin. Average annual soil loss from the KU watershed of Krishna River basin was 27.02t/ha/yr. According to soil erosion classification one micro watershed was classified under slight erosion class, 30 micro watersheds were under moderate erosion class, 29 micro watersheds were high erosion class, 11 micro watersheds were under very high erosion class and one micro watershed falls in severe erosion class. Non-point source pollution, contributing to part of the downstream water quality deterioration of the Krishna River basin in the last decade, has resulted in an irreversible impact on land integrity from a long-term perspective. Estimation of annual soil loss is necessary to identify potential erosion areas and to carry out the conservation measures.
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