IJFANS International Journal of Food and Nutritional Sciences

ISSN PRINT 2319 1775 Online 2320-7876

Estimation of Soil Erosion in Hiranyakeshi Basin Using RUSLE Model and Geospatial Techniques

Main Article Content

Dr. S.S.Panhalkar , Mr. Sagar P. Mali

Abstract

Fertile land is the most vulnerable resource on the earth surface and it needs to be conserved from its degradation. Detachment and transport of top soil layer from upland to lowland area causes loss of fertile soil. It is also responsible for other problems like up-gradation of river channel, reservoir sedimentation and water pollution. Main objective of present research is to locate and calculate the susceptible areas of soil erosion in the Hiranyakeshi basin of Kolhapur district, Maharashtra. Rainfall-runoff erosivity (R), soil erosivity factor (K), slope length /steepness factor (LS), cover management factor (C) and conservation practice factor (P) are the basic parameters required to generate this model. Land use/ land cover map is prepared through supervised classification techniques by using IRS P-6 LISS-III data set of year 2007. CartoDEM satellite image applied for slope length and steepness calculation. Other parameters required for Revised Universal Soil Loss Equation (RUSLE) model were assessed and generated using geospatial technology to estimate soil erosion. Raster calculator of ArcGIS 9.3 software is used for data integration and finally annual average soil loss in ton/ha/year has been calculated. As per RUSLE analysis, Soil erosion map has been classified into 7 classes to represent the intensity of soil erosion. It reveals that around 78% area in the basin is having soil erosion less than 5 ton/ha/year which is under the low risk zone. 11% area lies between 5 to 20 ton/ha/year which have moderate risk of soil erosion, 5 % basin area is in high risk zone which have 20 to 50 ton/ha/year erosion rate and only 6 % basin area is under very critical risk zone which have annual soil erosion rate is above 50 ton/ha/year. Watershed development plan should be adopted for high risk zone areas which are more vulnerable for soil erosion. Upper sub-basins of Hiranyakeshi have been more intensity for very critical soil loss due to high elevation and steepness. Hence, such sub-basins need to give higher priority for soil loss prevention practices

Article Details