论文摘要
The Jinsha River Basin is an important basin for hydropower in China and it is also the main runoff and sediment source area for the Yangtze River,which greatly influence the runoff and sediment in the Three Gorges Reservoir.This study aims to characterize the spatial distribution,inter-annual variation of runoff and sediment load in the Jinsha River Basin,and to analyze the contribution of rainfall and human activities to the runoff and sediment load changes.The monitoring data on runoff,sediment load and precipitation were collected from 11hydrological stations in the Jinsha River Basin from1966 to 2016.The data observed at the outlet of the basin showed that 71.4%of the runoff is from the upper reaches of the Jinsha River Basin and the Yalong River,while 63.3%of the sediment is from the lower reaches（excluding the Yalong River）.There is no significant increase in runoff on temporal scale in the Jinsha River Basin,while it has an abrupt change in runoff in both upstream and midstream in 1985,and an abrupt change in downstream in 1980 and2013.The sediment load demonstrated a significantincreasing trend in the upstream,no significant reducing trend in the midstream,but significant reducing trend in the downstream.The sediment load in upstream showed abrupt change in 1987,in midstream in 1978 and 2014,in downstream in 2012.Rainfall dominated runoff variation,contributing more than 59.0%of the total variation,while human activity,including reservoirs construction,the implementation of soil and water conservation projects,is the major factor to sediment load variation,contributing more than 87.0%of the total variation.
论文目录
文章来源
类型: 期刊论文
作者: LU Chuan-hao,DONG Xian-yong,TANG Jia-liang,LIU Gang-cai
来源: Journal of Mountain Science 2019年10期
年度: 2019
分类: 基础科学,工程科技Ⅱ辑
专业: 地球物理学,水利水电工程
单位: Institute of Mountain Hazards and Environment, Chinese Academy of Sciences and Ministry of Water Conservancy, Key Laboratory of Mountain Surface Processes and Ecological Regulation, Chinese Academy of Sciences,University of Chinese Academy of Sciences,China Three Gorges Corporation
基金: supported by the “National Key R & D Plan Project of China (2018YFD0200502),the 135 Strategic Program of the Institute of Mountain Hazards and Environment,CAS (SDS135-1702)
分类号: P333
页码: 2361-2378
总页数: 18
文件大小: 535K
下载量: 24
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