水土保持研究2012，Vol.19Issue(5)：65-69,5.
嘉陵江流域输沙量演变规律分析
Variation of Sediment Discharge in the Jialingjiang River Basin
摘要
Abstract
Severe soil erosion in the Jialing River Basin contributes to large amount of sediment yields in the upper reaches of the Yangtze River. Analysis on variation of sediment discharge is helpful to understand the mechanism of soil erosion and impacts of human activities. This paper applied the Mann--Kendall test and double mass curve methods to detect the variation of annual and monthly sediment flux at Beibei station in the Jialing River. The results indicated that a general decline in sediment discharge was detected, and the changing point at 1992 was found. Furthermore, the streamflow showed slight increasing trend, while the sediment flux reduced significantly at 95% confidence level. Sediment yield mainly occurred during the flood season from July to September, accounting for more than 72% of the annual amount. Double curve analysis between sediment flux and precipitation showed two stages for the whole study period Ⅰ （1956--1984） and Ⅱ （1985--2008）. Soil and water conservation is responsible for the notable reduction in sediment flux, accounting for about 75%.关键词
嘉陵江/输沙量/水土保持/泥沙变化Key words
Jialing River/sediment discharge/soil and water conservation/variation of sediment分类
天文与地球科学引用本文复制引用
宋凤军,穆兴民,白桦..嘉陵江流域输沙量演变规律分析[J].水土保持研究,2012,19(5):65-69,5.基金项目
资助项目作者简介通信作者巾荷联合主题研究项目[（中国科学院对外合作重点项目计划,GJHZ1018）和（NetherlandsOrganizationforScientificResearch,NWO,OND1339291）] （）
国家科技支撑计划项目 （）
欧盟第六框架计划项目 （）
