林草措施调控坡面降雨径流输沙效应的初步研究  

The Study about Runoff and Sediment Transport Rules and Effect of Shrub and Grass Measures on Slope

作　　者：田栋[1] 高建恩[1] 吴普特[1] 舒若杰[1] 杨世伟[1] 唐小娟[1] 

机构地区：[1]西北农林科技大学中国科学院水利部水土保持研究所国家节水灌溉杨凌工程技术研究中心,陕西杨凌712100

出　　处：《灌溉排水学报》2007年第3期19-22,共4页Journal of Irrigation and Drainage

基　　金："十一五"国家支撑计划(2006BAD09B01)

摘　　要：利用人工模拟降雨小区试验,分析了林地和草地2种生物措施在不同坡度、不同雨强下的径流调控和产沙机制。结果表明,产流时间和降雨强度之间存在幂函数关系,与单宽输沙率之间存在线性关系,单宽输沙率与单宽流量之间亦存在线性关系。并对2种措施的调控效应进行比较,草地措施的产流、产沙调控效应均优于林地措施。Using simulating rainfall experiment and the present research, we deeply analyze the runoff and sediment transport rules and effect of shrub and grass measures under different slope and rainfall intensity. The results show that there is a power function relation between rainfall intensity and runoff duration and a linear relation between rainfall intensity and sediment transport rate of unit width, and we find the experienced coefficient of above relations through regression analysis. Using the concept of runoff controlling rate, we find out that the grassland flow controlling effect is better than the shrub measure under different rainfall intensity.

关 键 词：林草措施 径流调控 产流起始时间 单宽输沙率 调控效应 

分 类 号：S157[农业科学—土壤学]