%0 Journal Article
%A WANG Ai-juan
%A DING Wen-feng
%A WANG Wan-jun
%T Characteristics of Runoff and Sediment Yield of Purple Soil Slope Surface in the Presence of Artificial Rainfall and Scouring
%D 2015
%R 10.3969/j.issn.1001-5485.2015.03.007
%J Journal of Yangtze River Scientific Research Institute
%P 31-34
%V 32
%N 3
%X <p>Soil tank (3 m&times;1 m) of variable slope was taken for artificial rainfall and runoff scouring test. The features of runoff and sediment yield on purple soil slope in the presence of different slope gradients (5&deg;~20&deg;), rainfall intensities(0.6~2.5 mm/min), and scouring flow rates(1.6~7 m<sup>3</sup>/s) were researched. Results indicate that in scouring test, the runoff flow velocity from slope top to slope toe changes in three tendencies: first increases and then reduces, progressively increases, and progressively reduces; whereas for artificial rainfall test, the runoff flow velocity gradually increases from slope top to slope toe. The critical time of runoff getting stable in both tests is 15min; whereas for sediment concentration, the time of getting stable is between 5~50min in artificial rainfall test and 20min in scouring test.</p>
%U http://ckyyb.crsri.cn/EN/10.3969/j.issn.1001-5485.2015.03.007