http://www.sciencedirect.com/science/article/pii/S1674987111001034 |
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| Authors: | V Prasannakumar H Vijith S Abinod N Geetha |
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| Institution: | Centre for Geoinformation Science and Technology, University of Kerala, Kariavattom, Thiruvananthapuram 695 581, Kerala, India |
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| Abstract: | A comprehensive methodology that integrates Revised Universal Soil Loss Equation (RUSLE)
model and Geographic Information System(GIS) techniqueswas adopted to determine the soil erosionvulnerability
of a forestedmountainous sub-watershed inKerala, India. The spatial pattern of annual soil erosion rate
was obtained by integrating geo-environmental variables in a raster based GIS method. GIS data layers
including, rainfall erosivity (R), soil erodability (K), slope length and steepness (LS), cover management
(C) and conservation practice (P) factors were computed to determine their effects on average annual soil loss
in the area. The resultant map of annual soil erosion shows a maximum soil loss of 17.73 t h-1 y-1 with a close
relation to grass land areas, degraded forests and deciduous forests on the steep side-slopes (with high LS ). The
spatial erosionmaps generatedwithRUSLEmethod andGIS can serve as effective inputs in deriving strategies
for land planning and management in the environmentally sensitive mountainous areas. |
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| Keywords: | Soil erosion Revised Universal SoilLoss Equation (RUSLE) GIS Pamba Western Ghats Kerala |
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