| Title |
Effect of DEM Resolution in USLE LS Factor |
| Authors |
구자영 ( Ja Young Koo ) ; 윤대순 ( Dae Soon Yoon ) ; 이동준 ( Dong Jun Lee ) ; 한정호 ( Jeong Ho Han ) ; 정영훈 ( Younghun Jung ) ; 양재의 ( Jae E Yang ) ; 임경재 ( Kyoung Jae Lim ) |
| DOI |
https://doi.org/10.15681/KSWE.2016.32.1.89 |
| Keywords |
DEM; LS factor; Resolution; Topographic factor; Universal Soil Loss Equation; USLE |
| Abstract |
Digital Elevation Models (DEMs) have been used to represent the effects of topography on soil erosion. A DEM of 30 m resolution is frequently used in hydrology and soil erosion studies because the National Water Management Information System (WAMIS) provides a 30 m resolution DEM at national scale on its web site. However, the Ministry of Environment recommends the use of a DEM with 10 m resolution for evaluation of soil erosion due to the fact that soil erosion estimation is to some degree affected by the spatial resolution of DEM. In this regard, a DEM with 5 m resolution was resampled for 10 × 10 m, 20 × 20 m, 30 × 30 m, 50 × 50 m, 70 × 70 m, and 100 × 100 m resolutions, respectively. USLE LS factors and soil erosion values were evaluated using these datasets. Use of a DEM with at least 30 m resolution provided reasonable LS factors and soil erosion values at a watershed. |