한국형 토양유실공식에 의한 토양유실량 현장예측

초록

In 2013, the Ministry of Environment in South Korea promulgated a new regulatory bulletin that contained revisedenforcement ordinance on soil management protocols. The bulletin recommends the use of Universal Soil Loss Equation(USLE) for the soil erosion estimation, but USLE has limited applicability in prediction of soil erosion because it does notallow direct estimation of actual mass of soil erosion. Therefore, there is a great need of revising the protocol to allowdirect comparison between the measured and estimated values of soil erosion. The Korean Soil Loss Equation (KORSLE)was developed recently and used to estimate soil loss in two fields as an alternative to existing USLE model. KORSLEwas applied to estimate monthly rainfall erosivity indices as well as temporal variation in potential soil loss. The estimatedpotential soil loss by KORSLE was adjusted with correction factor for direct comparison with measured soil erosion. Theresult was reasonable since Nash-Stucliff efficiency were 0.8020 in calibration and 0.5089 in validation. The resultssuggest that KORSLE is an appropriate model as an alternative to USLE to predict soil erosion at field scale.

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