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논문 기본 정보

자료유형
학술저널
저자정보
저널정보
한국농공학회 한국농공학회논문집 한국농공학회논문집 제61권 제6호
발행연도
2019.1
수록면
55 - 65 (11page)

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Universal Soil Loss Equation (USLE) is to estimate potential soil loss and has benefit in use with its simplicity. The equation is composed of fivefactors, one of the factors is the slope length and steepness factor (LS factor) that is for topographic property of fields to estimate potential soil loss. Since the USLE was developed, many equations to compute LS was suggested with field measurement. Nowadays the factor is often computed in GISsoftware with digital elevation model, however it was reported that the factor is very sensitive to the resolution of digital elevation model. In addition,the digital elevation model of high resolution less than 3 meter is required in small field application, however these inputs are not associate with theempirical models’ backgrounds since the empirical models were derived in 22.1 meter field measurements. In the study, four equation to compute LSfactor and two approaches to determine slope length and steepness were examined, and correction factor was suggested to provide reasonable precisionin LS estimations. The correction factor is computed with field area and cell size of digital elevation model, thus the correction factor can be adaptedin any USLE-based models using LS factor at field level.

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