宁南山区不同降雨强度下坡地的产流产沙特征分析  

Sediment and Runoff Yield Characteristics of Slope Lands under Different Intensity of Rainfall in South-ern Region of Ningxia

作　　者：王月玲[1] 王思成 马璠[1] 蔡进军[1] 潘占兵[1] 

机构地区：[1]宁夏农林科学院荒漠化治理研究所,宁夏银川750002 [2]宁夏农垦局农业综合开发办,宁夏银川750001

出　　处：《宁夏农林科技》2011年第8期64-67,共4页Journal of Ningxia Agriculture and Forestry Science and Technology

基　　金："十一五"国家科技支撑计划课题(2006BAC01A07);国家自然科学基金课题(40861028)资助

摘　　要：采用人工模拟降雨方法,分设3种不同的降雨强度,研究了宁南山区人工草地和坡耕地的产流产沙特征。结果表明:人工草地与坡耕地的径流量最高分别为14.55、14.21 mm;侵蚀模数坡耕地最高为15.5 t/km2,人工草地最高为10 t/km2。人工草地和坡耕地的径流量、侵蚀模数均随降雨强度的增加而增加,并与降雨强度呈指数函数或幂函数。The characteristics of sediment and runoff yield on grassland and plowland were studied by adopting artifi-cial rainfall simulation With 3 different rainfall intensity in the Southern Ningxia region.The results showed that in the three artificial simulation of rainfall,the maximum runoffs of grassland and plowland were 15.55mm and 14.21mm re-spectively,and the maximum soil erosion of grassland and plowland were 15.5t/km^2 and 10 t/km^2.The grassland and plow-land runoff and soil erosion were increased with the exponential or the power function of the rainfall intensity.

关 键 词：人工模拟降雨 降雨强度 坡地 产流产沙特征 

分 类 号：S157[农业科学—土壤学]