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http://dx.doi.org/10.15681/KSWE.2016.32.1.108

Evaluation of Modeling Approach for Suspended Sediment Yield Reduction by Surface Cover Material using Rice Straw at Upland Field  

Park, Youn Shik (Department of Regional Construction Engineering, Kongju National University)
Kum, Donghyuk (Department of Regional Infrastructures Engineering, Kangwon National University)
Lee, Dong Jun (Department of Regional Infrastructures Engineering, Kangwon National University)
Choi, Joongdae (Department of Regional Infrastructures Engineering, Kangwon National University)
Lim, Kyoung Jae (Department of Regional Infrastructures Engineering, Kangwon National University)
Kim, Ki-sung (Department of Regional Infrastructures Engineering, Kangwon National University)
Publication Information
Journal of Korean Society on Water Environment / v.32, no.1, 2016 , pp. 108-114 More about this Journal
Abstract
Sediment-laden water leads to water quality degradation in streams; therefore, best management practices must be implemented in the source area to control nonpoint source pollution. Field monitoring was implemented to measure precipitation, direct runoff, and sediment concentrations at a control plot and straw-applied plot to examine the effect on sediment reduction in this study. A hydrology model, which employs Curve Number (CN) to estimate direct runoff and the Universal Soil Loss Equation to estimate soil loss, was selected. Twenty-five storm events from October 2010 to July 2012 were observed at the control plot, and 14 storm events from April 2011 to July 2011 at the straw-applied plot. CN was calibrated for direct runoff, and the Nash-Sutcliffe efficiency and coefficient of determination were 0.66 and 0.68 at the control plot. Direct runoff at the straw-applied plot was calibrated using the percentage direct runoff reduction. The estimated reduction in sediment load by direct runoff reduction calibration alone was acceptable. Therefore, direct runoff-sediment load behaviors in a hydrology model should be considered to estimate sediment load and the reduction thereof.
Keywords
Best management practice; Curve number; Nonpoint source pollution; Surface cover;
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Times Cited By KSCI : 5  (Citation Analysis)
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