전국토를 대상으로 하는 토양유실 예측에서의 토양침식성인자 정의에 관한 연구

Abstract

Soil erosion is a phenomenon that causes the loss of fertile soil in agricultural land and the decrease in the stability of social infrastructures, threatening the sustainability of land and ecosystems. Thus, there is a need to prevent soil erosion, Universal Soil Loss Equation (USLE) is often used to estimate soil erosion as a fundamental process in soil erosion management. USLE has five factors, the soil erodibility factor (USLE K) is to represent soil property against rainfall condition causing soil erosion. In South Korea, the Ministry of Environment regulates soil erosion with the Public Notice on the Current Topsoil Erosion that is based on USLE, however the USLE K provided in the public notice needs to be updated since the soil category doesn’t correspond to the current soil map. Therefore, several USLE K equations were investigated, and USLE K values were evaluated and compared to define acceptable approachfor USLE K updates in the public notice. A specific method was suggested to update the USLE K, and it is expected that USLE K can be employed for the public notice in current status. Moreover, USLE K values can be updated with soil property updates in the future if the equation and approach are applied.