水利水电科技进展2013，Vol.33Issue(1)：7-12,6.DOI:10.3880/j.issn.1006-7647.2013.01.002
澜沧江-湄公河输沙量变化及其影响因素
Change in sediment loads in the Lancang-Mekong River and its influencing factors
摘要
Abstract
To accurately evaluate variations of sediment loads in the Lancang-Mekong River and influences of its upstream hydropower development on sediment loads in its downstream reaches, the credible data of annual sediment loads at various monitoring stations along the Lower Mekong River are chosen from the existing literatures, and the annual runoffs and sediment loads at Gajiu hydrological station (the first station downstream Manwan Hydropower Station dam on Lancang River) from 1965 to 2003 are yielded. The change trend of annual sediment loads of the Lancang-Mekong River at various stations is analyzed and compared. The results show that the annual sediment loads at Gajiu hydrological station has a dramatical decrease of over 60% after the operation of Manwan Hydropower Project However, the sediment loads at Chiang Saen hydrological station and its downstream stations do not have the consistent change trend. The main causes for the less decrease of sediment loads at Chiang Saen hydrological station than that at Gajiu hydrological station are as follows: confluence of tributaries with high sediment concentration, soil and water losses caused by replacement of natural forest by artificial economic forest, and recovery of sediment content in the rivers. The amount of sediment loads of the Mekong River entering the sea is about 145 million t/a, and it is predicted to be reduced in the future.关键词
澜沧江/湄公河/输沙量/径流量Key words
Lancang River/ Mekong River/ sediment load/ runoff分类
天文与地球科学引用本文复制引用
刘成,王建军,何耘..澜沧江-湄公河输沙量变化及其影响因素[J].水利水电科技进展,2013,33(1):7-12,6.基金项目
中国水利水电科学研究院专项(沙集-1230) （沙集-1230）
"十二五"国家科技支撑计划(2012BAB02B01) （2012BAB02B01）
