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Mathematical Description of Soil Loss by Runoff at Inclined Upland of Maize Cultivation  

Hur, Seung-Oh (Soil Management Division, National Institute of Agricultural Science and Technology, RDA)
Jung, Kang-Ho (Soil Management Division, National Institute of Agricultural Science and Technology, RDA)
Ha, Sang-Keon (Soil Management Division, National Institute of Agricultural Science and Technology, RDA)
Kwak, Han-Kang (Soil Management Division, National Institute of Agricultural Science and Technology, RDA)
Kim, Jeong-Gyu (Division of Environmental Science and Ecological Engineering, Korea University)
Publication Information
Korean Journal of Soil Science and Fertilizer / v.38, no.2, 2005 , pp. 66-71 More about this Journal
Abstract
Soil loss into stream and river by runoff shall be considered for non-point source pollution management as national land conservation. The purpose of this study was to develop the mathematical equation to predict soil loss from inclined uplands of maize cultivation due to the runoff by rainfall which mainly converges on July and August. Soil loss was concentrated on May because of low canopy over an entire field in 2002 and on June and July because of heavy rainfall in 2003. By regression analysis the relation between runoff and soil loss can be represented by a linear equation of y =1.5291x - 3.4933, where y is runoff ($Mg\;ha^{-1}$) and x is soil loss ($kg\;ha^{-1}$). The determination coefficient of this equation was 0.839 (P<0.001). Therefore, the mathematical equation derived from the practical experiment at the inclined upland can be applicable to predict soil loss accompanied by runoff due to periodic rainfall converging on short periods within a couple of months.
Keywords
Soil loss; Soil erosion; Runoff; Model;
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