水土保持对小流域地表径流时间特征变化的影响  

the Effects of Soil and Water Conservation on Temporal Change of the Surface Runoff in Watersheds

作　　者：丁琳霞[1] 穆兴民[2] 

机构地区：[1]福建泉州师范学院地理系,福建省362000 [2]中国科学院水土保持研究所

出　　处：《干旱区资源与环境》2004年第3期103-106,共4页Journal of Arid Land Resources and Environment

基　　金：水利部重点攻关课题 (SZ983 2 );泉州师范学院专项资助项目 (2 0 0 2 L 12 )

摘　　要：本文用小流域平行对比观测法 ,分析了水土保持对小流域地表径流时间变化的影响 ,结果表明 :水土保持能减少年径流量 ,减少洪水次数 ,降低地表径流模数 ,增加流域蓄水量40 %～ 60 %。治理小流域能有效拦蓄汛期降水 ,增加非汛期常水流量 2 0 %以上 ;在拦蓄暴雨径流中能发挥较大的作用 ,蓄暴效益平均可达 60 %～ 70 %。In this paper the effects of the soil and water conservation on temporal change of surface runoff in typical small watersheds were analyzed by the parallel observation in two comparable watersheds in Loess Plateau. The integral control of soil and water loss in the region can result in the decreases of flooding time and runoff modulus, increase retaining of rain in the watershed by 40%~60%. It can effectively retain precipitation in rainy season, increase runoff in dry season more than 20%. Its benefit of retaining rainstorm is between 60% and 70%.

关 键 词：水土保持 地表径流时间 径流量 径流模数 蓄水量 

分 类 号：S157[农业科学—土壤学] P332.4[农业科学—农业基础科学]