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Research Paper | January 1, 2022

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Geospatial analysis of soil erosion rates using RUSLE and GIS model in Bong-bong Subwatershed Pangantucan Bukidnon

Dr. Ricardo G. Villar, Neli Jean L. Remotigue

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J. Bio. Env. Sci.20(1), 93-104, January 2022

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Abstract

The Accelerated rate of soil erosion is a severe and continuous endemic environmental problem of the farmers in Barangay Adtuyon. The present study of soil erosion is carried out in the upper stream of Muleta watershed of Pangantucan, Bukidnon locally called Bong-bong sub-watershed. It is fact that the surface runoff of seasonal rainfall is intense in this area due to its sloping terrain characteristics. Average annual soil erosion has been estimated based on the five parameters defined in the Revised Universal Soil Loss Equation (RUSLE) and with the help of Geographical Information Technology. Overlay of five parameters, rainfall erosivity factor (R), soil erodibility factor (K), slope length and steepness factor (LS), cover and management factor (C) and support and conservation’s practices factor (P) has been done in GIS platform. Predicted average annual soil erosion of the sub-watershed has been classified using three land uses of the of the study site. The resulting simulated maps by RUSLE was derived indicating spatial variability of soil erosion within the perimeter of each study site. The soil erosion in Bong-bong sub-watershed based on simulated findings of the RUSLE model ranges from 0-400 ton/year. This indicates that the area is prone to soil erosion as contributed by the five erosion factors identified by RUSLE model. A spatial map was generated presenting the erosion in the whole sub-watershed. Statistical analysis showed very good model results acquiring <.50 RSR value comparing the field erosion measurements to the RUSLE-GIS simulated results.

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Geospatial analysis of soil erosion rates using RUSLE and GIS model in Bong-bong Subwatershed Pangantucan Bukidnon

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