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http://dx.doi.org/10.12652/Ksce.2015.35.1.0111

Influence of Spatial Rainfall Distribution on Sediment Yield: An Experimental Study  

Shin, Sanghoon (Korea University)
Kim, Won (Korea University)
Lee, Seungyub (Korea University)
Paik, Kyungrock (Korea University)
Publication Information
KSCE Journal of Civil and Environmental Engineering Research / v.35, no.1, 2015 , pp. 111-117 More about this Journal
Abstract
We investigate the influence of spatial rainfall distribution on hillslope soil erosion through laboratory experiments. Two distinct spatial distributions are examined in this study, i.e., rainfall concentrated on central area versus upper area of hillslope. During the entire period of 8 hours for each experiment, direct runoff, subsurface flow, and sediment yield are measured at high temporal resolution (10 minutes). Compared to the case that rainfalll concentrated on central area, upstream concentrated rainfall results in lower peak of the sediment yield curve while greater cumulative sediment yield. Cumulative sediment yield increases over time linearly but its growth rate shows a sudden decrease at around 2 hours. This should be taken into consideration when temporal variability of sediment yield is estimated from observed total amount, and demonstrates the necessity of measuring sediment yield at high temporal resolution.
Keywords
Soil erosion experiment; Rainfall generator; Soil loss; USLE;
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Times Cited By KSCI : 2  (Citation Analysis)
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