水土保持学报2018，Vol.32Issue(2)：34-39,6.DOI:10.13870/j.cnki.stbcxb.2018.02.005
不同母质红壤坡面产流产沙特征比较
The Characteristics of Runoff and Sediment Yield of Red Soil Slope with Different Parent Materials
摘要
Abstract
In this paper,the artificial simulated rainfall combined with the indoor backfill soil trough was used to study the difference among the characteristics of the runoff and sediment yield in the red soil slopes with different parent meterials:granite,quaternary and red sandstone.Results showed that the order of surface runoff time of the three parent materials was granite＜red sandstone＜quaternary,averaging runoff rates and the total amount of runoff were granite＞red sandstone＞quaternary,where the runoff amount of granite red soil under 45 mm/h rainfall was 1.79～2.47 times of those of red sandstone and quaternary,and the averaging runoff rate was 1.58～2.32 times of those of the latter two.Under the rainfall conditions of 45 mm/h,the sediment concentration of the field was the quaternary＞granite＞red sandstone,while,it was granite＞red sandstone＞quaternar under 135 mm/h.The rain intensity had a greater influence on the sediment yield of red soil slope,and the sediment concentration under 135 mm/h was 8.31～11.32 times of 45 mm/h.As for the runoff composition,the proportion of interflow in runoff was highest in quaternary red soil among the materials,which was about 8％ ～ 44％ in the two rain intensities.The larger rain intensity,the more obvious effect of the surface confluence,which could reach up to 79％～90％ of the total runoff under 135 mm/h.The runoff time of interflow was same as that of the surface runoff:granite＜red sandstone＜quaternary,the interflow of granite red soil was smallest,accounting for only 53％～67％ of the quaternary,and even 42％ ～52％ at the peak runoff.After the rainfall,the regression of interflow could be predicted by an exponential function,all the decision coefficients were above 0.82 for all conditions,showing a good predictability.关键词
成土母质/红壤/壤中流/产流特征Key words
parent material/red soil/interflow/runoff characteristics分类
农业科技引用本文复制引用
徐铭泽,杨洁,刘窑军,杨广勇..不同母质红壤坡面产流产沙特征比较[J].水土保持学报,2018,32(2):34-39,6.基金项目
国家自然科学基金项目(41361060,41501287) （41361060,41501287）
