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2006•Unpublished venueRequires access

Experimental Study on Runoff Characteristics of Slope Land in Sichuan Basin

Wang Xiantuo, Wang Yukuan, Yongqiang Wang, Daojie Wang

Open publisher page 4 citations

Abstract

It studied runoff characteristics on purple soil slope land in Sichuan basin by using simulated rainfall method.The results showed that under high rainfall intensity,the influence of slope gradient on rainfall runoff duration was not apparent.Rainfall runoff duration would increase obviously if the slope gradient reduced when the rainfall intensity was low,and their relationship might be described by a power function.The runoff intensity of bare land was stronger than that of farmland,and the runoff change rate of bare land varied acutely along with the process of rainfall.Slope showed much more influence on coefficient of runoff under high rainfall intensity.It was concluded that the critical slope gradient of bare land runoff was between 10°~15°,and that of farmland was about 20°.

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What this paper is about

It studied runoff characteristics on purple soil slope land in Sichuan basin by using simulated rainfall method.The results showed that under high rainfall intensity,the influence of slope gradient on rainfall runoff duration was not apparent.Rainfall runoff duration would increase obviously if the slope gradient reduced when the rainfall intensity was low,and their relationship might be described by a power function.The runoff intensity of bare land was stronger than that of farmland,and the runoff change rate of bare land varied acutely along with the process of rainfall.Slope showed much more influence on coefficient of runoff under high rainfall intensity.It was concluded that the critical slope gradient of bare land runoff was between 10°~15°,and that of farmland was about 20°.

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Available abstract

It studied runoff characteristics on purple soil slope land in Sichuan basin by using simulated rainfall method.The results showed that under high rainfall intensity,the influence of slope gradient on rainfall runoff duration was not apparent.Rainfall runoff duration would increase obviously if the slope gradient reduced when the rainfall intensity was low,and their relationship might be described by a power function.The runoff intensity of bare land was stronger than that of farmland,and the runoff change rate of bare land varied acutely along with the process of rainfall.Slope showed much more influence on coefficient of runoff under high rainfall intensity.It was concluded that the critical slope gradient of bare land runoff was between 10°~15°,and that of farmland was about 20°.

Key concepts: Surface runoff, Environmental science, Hydrology (agriculture), Intensity (physics), Structural basin, Runoff curve number, Drainage basin, Runoff model

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