长江上游川中紫色土丘陵区小流域泥沙输移比空间尺度效应研究  

Sediment Delivery Ratio and Spatial Scale Effect of Small Watershed in the Hilly Area of Central Sichuan Province

作　　者：高旭彪[1] 孙厚才[2] 赵永军[1] 高照良[3] 

机构地区：[1]水利部 水土保持监测中心,北京100053 [2]长江科学院 水土保持研究所,湖北武汉430010 [3]西北农林科技大学 中国科学院 水利部 水土保持研究所,陕西杨凌712100

出　　处：《水土保持通报》2007年第6期130-133,151,共5页Bulletin of Soil and Water Conservation

基　　金：中国科学院知识创新工程重要方向项目(KZCX3-SW-444);西北农林科技大学拔尖人才支持计划项目;自然科学基金项目(50779063)资助

摘　　要：应用分形理论空间尺度效应原理,采用^(137)Cs同位素示踪法测定小流域多年平均侵蚀模数和调查紫色土丘陵区不同小流域多年平均淤积模数的方法,探讨了泥沙输移比与小流域集雨面积的关系,得出了长江上游川中紫色土丘陵区小流域泥沙输移比空间尺度效应泥沙输移比(SDR)统计模型。经验证,该模型可用于估算紫色土丘陵区资料短缺小流域的输移比和产沙量。According to the basic principles of fractal theory and spatial scale effect, Cesium-137 isotope tracer technique was used to measure annually averaged soil erosion modulus of small watershed in the hilly area with purple soil in Central Sichuan Province. Moreover, annually averaged deposition modulus of different small watersheds was investigated： The relation of sediment delivery ratio to rainwater collection area of small watershed was discussed. The statistical model of the relation between sediment delivery ratio and spatial scale effect of small watershed was constructed. The model can be used to estimate sediment delivery ratio and sediment yield of small data-lacked watershed in the hilly area with purple soil.

关 键 词：分形理论 紫色土 自相似原理 输移比 

分 类 号：S157[农业科学—土壤学]