川中丘陵区小流域产沙的塘库沉积研究——以南充流溪河为例  

Sediment Yields of Small Catchments in Hilly Sichuan Basin Calculated by Pond and Reservoir Deposits ——A Case Study in the Liuxi River Basin of Nanchong City

作　　者：伏介雄[1] 贺秀斌[1] 文安邦[1] 齐永青[1] 张信宝[1] 

机构地区：[1]中国科学院水利部成都山地灾害与环境研究所

出　　处：《水土保持通报》2005年第4期50-52,102,共4页Bulletin of Soil and Water Conservation

基　　金：国家自然科学基金项目(40271015);中科院知识创新项目(KZCX3-SW-422;KZCX3-SW-300);973项目(2003CB415802)

摘　　要：报道了川中丘陵区小流域产沙塘库沉积研究的初步结果.研究表明,南充流溪河流域内平均小流域淤沙模数762 t/(km2·a),淤沙模数随流域面积增大而减少的趋势不明显,小流域泥沙输移比显然远高于前人报道的0.10～0.27,土壤侵蚀速率远低于全国第2次遥感普查值3 000～5 000 t/(km2·a).A preliminary study on sediment yields of small catchments is conducted by using pond and reservoir deposits in the Liuxi river basin of Nanchong City, in the Hilly Sichuan Basin. The average specific sediment yield of small catchments over the basin is 762 t/（km^2· a）, and the tendency of .sediment yield increase with the catchment area increase is not apparent. However, the sediment delivery ratio in the basin should be much higher than the previously reported values of 0.10-0. 27, and the soil erosion rate should be much less than the values of 3 000- 5 000 t/（km^2 ·a） reported by the second state survey using the remote sensing method.

关 键 词：川中丘陵区 小流域 塘库沉积 侵蚀产沙 

分 类 号：S157.1[农业科学—土壤学] P333.4[农业科学—农业基础科学]