紫色土坡面产流产沙模拟试验研究  

Experimental Research on Runoff and Sediment Yield Characteristics on Purple Soil Slope

作　　者：钟壬琳[1,2] 张平仓[2] 

机构地区：[1]浙江省水土保持监测中心,浙江杭州310009 [2]长江科学院水土保持研究所,湖北武汉430010

出　　处：《浙江水利科技》2011年第2期6-9,15,共5页Zhejiang Hydrotechnics

基　　金：国家重点基础研究发展计划资助项目(2007CB407203)

摘　　要：应用人工模拟降雨试验，对紫色土坡面产流产沙特征进行了模拟试验研究。结果表明，紫色土坡面初始产流时间随着雨强的增大而减少，且在小雨强下坡度对初始产流时间的影响显著；紫色土坡面径流总量有随坡度和雨强的增加而增大的趋势，坡度较大时，雨强对径流总量的影响不明显；紫色土坡面产沙总量随着坡度和雨强的增大而增大，10，15，20°坡的产沙量较大，为3106．03～8117．09g，故应在坡度≥10°的坡地上实施有效的水土保持措施。In this paper, we study the runoff and sediment yield characteristics of purple soil slopes by artificial rainfall simulation experiments. The results show as follows： Initial runoff duration of purple soil slope decrease with rainfall intensifies, slope gradients have a major impact on the initial runoff duration in the small rainfall intensities. The runoff volume of purple soil slope increase with the slope gradients and rainfall intensities, rainfall intensifies have a impact on the runoff volume in the small slope gradients. The sediment yield of purple soil slope increase with the slope gradients and rainfall intensities. The sediment yield of different soil dopes （10, 15, 20°） are in large quantities with the range from 3106.03 to 8117.09g. Therefore, we should implement effective water and soil conservation measures on the soil slopes which are greater than or equal to 10 degrees.

关 键 词：紫色土 人工模拟 降雨试验 径流量 产沙量 

分 类 号：S157[农业科学—土壤学]