보정계수 적용을 통한 유역에 대한 ArcSATEEC의 월별 토양유실량 추정 방안 연구

초록

The universal soil loss equation (USLE), a model for estimating the potential soil loss, has been used not only in researchareas but also in establishing national policies in South Korea. Despite its wide applicability, USLE cannot adequatelyaddress the effect of seasonal variances. To overcome this limit, the ArcGIS-based Sediment Assessment Tool forEffective Erosion (ArcSATEEC) has been developed as an alternative model. Although the field-scale (< 100 m2)application of this model produced reliable estimation results, it is still challenging to validate accuracy of the modelestimation because it only estimates potential soil losses, not the actual sediment yield. Therefore, in this study, a methodfor estimating actual soil loss based on the ArcSATEEC model was suggested. The model was applied to eight watershedsin South Korea to estimate sediment yields. Correction factor was introduced for each watershed, and the estimatedsediment yield was compared with that of the estimated yield by LOAD ESTimator (LOADEST). Sediment yieldestimation for all watersheds exhibited reliable results, and the validity of the proposed correction factor was confirmed,suggesting the correction factor needs to be considered in estimating actual soil loss.

키워드