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Hydrology and Earth System Sciences An interactive open-access journal of the European Geosciences Union
https://doi.org/10.5194/hess-2016-649
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research article
10 Jan 2017
Review status
This discussion paper has been under review for the journal Hydrology and Earth System Sciences (HESS). The manuscript was not accepted for further review after discussion.
Estimation of 1 km Grid-based WATEM/SEDEM Sediment Transport Capacity Using 1 Minute Rainfall Data and SWAT Semi-distributed Sediment Transport Capacity Results for Han River Basin of South Korea
Chung-Gil Jung1, Won-Jin Jang2, and Seongjoon Kim2 1Dept. of Civil, Environmental System Eng., Konkuk University, Seoul, 143‐701, South Korea
2Dept. of Civil, Environmental and Plant Eng., Konkuk University, Seoul, 143‐701, South Korea
Abstract. When assessing the total sediment yield of a watershed through sediment transport from soil erosion process, the ratio of sediment delivery is a critical and uncertain factor during modelling. This study is to estimate watershed scale sediment yield distribution of 1 km by 1 km spatial resolution with the evaluation of RUSLE (Revised Universal Soil Loss Equation) rain erosivity (R factor) for 14 years (2000–2013) using 1 minute data from 16 rainfall gauging stations in Han River basin (34,148 km2) of South Korea. The WATEM/SEDEM sediment delivery algorithm based on RUSLE R, soil erodibility K, length-slope LS factors was adopted. The average R factor values of 1 minute for the basin were evaluated as 3,812 MJ/ha mm/year. To determine the 1 km grid-based KTC (transport capacity coefficient generally given as 100) for the WATEM/SEDEM sediment transport estimation, the SWAT (Soil Water Assessment Tool) MUSLE (Modified USLE) results from 181 sub-watersheds (from 50 km2 to 300 km2) were used. The SWAT simulated suspended solids versus observed ones at 7 locations showed average R2 (determination of coefficient) of 0.72. Using the SWAT sediment yields, the spatial KTC based on 60 minutes R factor was determined at each sub-watershed from 0.16 to 142.6 with average value of 12.7 for the whole basin.

Citation: Jung, C.-G., Jang, W.-J., and Kim, S.: Estimation of 1 km Grid-based WATEM/SEDEM Sediment Transport Capacity Using 1 Minute Rainfall Data and SWAT Semi-distributed Sediment Transport Capacity Results for Han River Basin of South Korea, Hydrol. Earth Syst. Sci. Discuss., https://doi.org/10.5194/hess-2016-649, 2017.
Chung-Gil Jung et al.
Chung-Gil Jung et al.

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This paper is to estimate KTC (Transport Capacity Coefficient) of TC equation in WATEM/SEDEM algorithm with the evaluation of RUSLE (Revised Universal Soil Loss Equation) rain erosivity (R factor) for 15 years (2000–2013) using 1 minute data from 16 rainfall gauging stations in Han River basin (34,148 km2). Especially, this paper firstly try to link three models (RUSLE, SWAT and TC modelig) and develop TC equation mideling in South Korea. Also, this study used various methods and models.
This paper is to estimate KTC (Transport Capacity Coefficient) of TC equation in WATEM/SEDEM...
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