Soil Erosion Analysis in Reclamation and Land Clearing Areas Using the USLE and RUSLE Approaches
DOI:
https://doi.org/10.20527/bpi.v8i1.287Keywords:
soil erosion, USLE, RUSLE, soil conservationAbstract
Soil erosion is one of the major environmental problems that leads to land degradation and sedimentation in water bodies. The Universal Soil Loss Equation (USLE) and the Revised Universal Soil Loss Equation (RUSLE) are models commonly used to estimate soil erosion rates in a given area. This study aims to analyze the erosion rate in the study site using the USLE and RUSLE approaches and to evaluate the contributing factors that influence the observed erosion levels. The results indicate that the estimated erosion rates in various land areas are as follows: stockpile area at 122.42 tons/ha/year (USLE) and 206.15 tons/ha/year (RUSLE), with a difference of 83.73 tons/ha/year; topsoil stock area at 40.88 tons/ha/year (USLE) and 68.83 tons/ha/year (RUSLE), with a difference of 27.95 tons/ha/year; land clearing area at 33.08 tons/ha/year (USLE) and 55.71 tons/ha/year (RUSLE), with a difference of 22.63 tons/ha/year; and revegetation area at 29.62 tons/ha/year (USLE) and 49.87 tons/ha/year (RUSLE), with a difference of 20.25 tons/ha/year. Based on field data verification, the erosion estimates generated using the USLE method (Utomo equation) were found to be more accurate. The main factors influencing erosion rates are slope gradient, soil type, land use, and rainfall intensity. The difference in results between USLE and RUSLE is attributed to modifications in the rainfall erosivity factor and the soil conservation factor in the RUSLE model. This study provides recommendations for conservation strategies that can be applied to reduce erosion risks in the study area. Keywords: soil erosion, USLE, RUSLE, soil conservation.References
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