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http://dx.doi.org/10.15681/KSWE.2016.32.1.89

Effect of DEM Resolution in USLE LS Factor  

Koo, Ja-Young (Department of Regional Infrastructures Engineering, Kangwon National University)
Yoon, Dae-Soon (Department of Regional Infrastructures Engineering, Kangwon National University)
Lee, Dong Jun (Department of Regional Infrastructures Engineering, Kangwon National University)
Han, Jeong Ho (Department of Regional Infrastructures Engineering, Kangwon National University)
Jung, Younghun (Korea Water Resources Corporation)
Yang, Jae E (Department of Biological Environment, Kangwon National University)
Lim, Kyoung Jae (Department of Regional Infrastructures Engineering, Kangwon National University)
Publication Information
Journal of Korean Society on Water Environment / v.32, no.1, 2016 , pp. 89-97 More about this Journal
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.
Keywords
DEM; LS factor; Resolution; Topographic factor; Universal Soil Loss Equation (USLE);
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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