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Effect of Rainfall Intensity on Sediment Yield and Infiltration on Stony Soils
Authors
吴冰
朱元骏
邵明安
Publication date
1 January 2011
Publisher
Abstract
通过室内模拟降雨研究降雨强度对含砾石土壤产沙及入渗的影响。结果表明:整个降雨过程中,60mm/h的降雨强度下,产沙率变化相对平稳,90mm/h和120mm/h的降雨强度下,土壤产沙率的变化均因为有细沟而产生波动,120mm/h的降雨强度下,细沟出现的时间较90mm/h的降雨强度提前了5~20min;降雨强度的增加导致土壤总产沙量也显著增加,当降雨强度从90mm/h增加到120mm/h时,总产沙量的增加量是降雨强度从60mm/h增加到90mm/h时总产沙量增加量的0.83~2.82倍;随着降雨强度的增加,土壤的入渗率有减小的趋势。Kostiakov模型和Horton模型均可以很好模拟3种降雨强度下含砾石土壤的入渗过程,而在60mm/h的降雨强度下,Horton模型优于Kostiakov模型,在90mm/h和120mm/h的降雨强度下,Kostiakov模型优于Horton模型
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Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources
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Last time updated on 21/09/2018