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Estimation of soil erosion vulnerability in Perambalur Taluk, Tamilnadu using revised universal soil loss equation model (RUSLE) and geo information technology

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Author Affiliations

  • 1Centre for Remote Sensing Bharathidasan University, Tiruchirappalli, Tamilnadu, India
  • 2Centre for Remote Sensing Bharathidasan University, Tiruchirappalli, Tamilnadu, India
  • 3Centre for Remote Sensing Bharathidasan University, Tiruchirappalli, Tamilnadu, India

Int. Res. J. Earth Sci., Volume 5, Issue (8), Pages 8-14, September,25 (2017)

Abstract

Soil loss is a universal land degradation problem arises from agricultural intensification, land degradation as its economic use, environmental impacts in addition to other anthropogenic activities. A widespread method of RUSEL and Geo information techniques used to make a decision of the soil erosion vulnerability of the study area. The spatial analysis of the annual soil erosion rate was obtained through the integrating of good environmental variables in a GIS based raster method. The present study was five major factors were used are R, K, LS, C and P factors were computed to decide their effect on average annual soil loss. The soil erosion map is reclassified according to the sing et. al. Soil erosion risk classes for Indian condition such as Low (>5), Moderate (5-10), High (10-20), Very high (20-40), Sever (40-80). The study area 68.95 % has low erosion risk and 16.80% moderate erosion risk of the total area. The other erosion risk classes such as high, very high and sever erosion range occurred in the percentage of 7.48 %, 4.52% and 2.26 % of the total area respectively. The resulting of the annual soil erosion map shows a maximum soil loss of 52.25 ton/ha/year, and the mean annual soil loss for the entire study area about 0.16 ton/ha/year. Its consequently the close relation to forests on the steep side slopes along with slope gradient and length followed by soil erodability factor were found to be the main factor of soil erosion.

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