晋西黄土区不同土地利用类型小流域径流产沙研究  

Runoff and sediment processes of the small watersheds under different land use in the Loess Region of Western Shanxi Province

作　　者：纳磊[1] 张建军[1] 朱金兆[1] 贺维[1] 董煌标[1] 杨国英 

机构地区：[1]北京林业大学水土保持学院,北京100083 [2]山西省吉县林业局,山西吉县042000

出　　处：《中国水土保持科学》2008年第2期49-54,共6页Science of Soil and Water Conservation

基　　金：“973”国家重大基础研究课题“森林植被调控区域农业水土资源与环境的尺度辨析与转换”(2002CB111503);“十一五”科技支撑计划“黄土高原半湿润区水土保持植被恢复技术试验示范”(2006BAD03A1204);国家自然科学基金“黄土坡面地表径流挟沙能力的研究”(30571530);日本丰田基金(The Toyota Foundation)“Study on erosion control by vegeta-tion on Loess Plateau of China”(D-05-R-003)

摘　　要：通过山西省吉县森林生态系统国家野外科学观测研究站蔡家川流域的实验观测,采取对比分析的方法,对不同土地利用类型小流域场降雨径流产沙过程进行研究。结果表明:在降雨量分别为8.6和13.6 mm的场降雨过程中,半农半牧小流域洪峰与沙峰基本同步,次生林小流域沙峰明显滞后于洪峰;农地小流域场降雨地表径流系数、产沙模数最高,分别为2.40%、6.40%和6.71 t/km2、73.69 t/km2;次生林小流域场降雨地表径流系数、产沙模数最低,分别为0.13%、0.75%和0.02 t/km26、.95 t/km2。As an important parts of watershed hydrology research, study on runoff and sediment process is the fundamental content of watershed hydrology modeling. The watershed in West of Shanxi Province which is a national forestry ecology research station was analyzed by experiments, runoff and sediment process from different types of land use was researched by contrastive analyzing. The results show that during the representative rainfall events （rainfall amounts： 8.6 mm and 13.6 mm）, suspended sediment concentration varies synchronizing with flow discharge in agricultural and stock breeding watershed. And it is obviously that peak of suspended sediment concentration lags behind flood peak in natural forested watershed. Modules of surface flow and sediment yield were highest as 2.40% ,6.40% and 6.71 t/km^2,73.69 t/km^2 in agricultural watershed, and lowest as 0.13% ,0.75% and 0.02 t/km^2 ,6.95 t/km^2 in natural forested watershed.

关 键 词：降雨 径流 泥沙 黄土区 

分 类 号：S715.1[农业科学—林学] S157.1