三峡水库初期蓄水对长江口淡水资源的影响  

Influence of Three Gorge reservoir filled with water on freshwater resource in the Yangtze River estuary

作　　者：曹勇[1] 陈吉余[2] 张二凤[2] 陈沈良[2] 曹卫承[1] 

机构地区：[1]上海市环境科学研究院,上海200233 [2]华东师范大学河口海岸国家重点实验室,上海200062

出　　处：《水科学进展》2006年第4期554-558,共5页Advances in Water Science

基　　金：国家自然科学基金资助项目(40276027)~~

摘　　要：2003年6月1—15日和同年10月20—31日三峡水库进行了初期蓄水。6月份水库蓄水后使下游大通流量减少了37％，长江口的淡水资源的持续时数降低了40％，最大盐度增加了3倍，平均盐度增加了6倍；10月份水库蓄水使大通流量减少了1／2，淡水资源的持续时间呈现下降趋势，最大盐度增加了3倍左右，平均盐度也有类似的表现。再从流量的沿程变化、流量的变化程度、影响河口淡水的持续时间、河口淡水资源影响因子方面进行了讨论，认为三峡蓄水是这两次河口淡水资源减少的主要原因。On June 1-15 and October 20-21, 2003, the Three Gorge reservoir was filled with water. In June, the discharge at Datong hydrological station reduced by 37 percent, and the lasting time of freshwater at the observation station decreased by 40 percent. The maximum salinity and average salinity increased 3 times and 6 times, respectively. In October, the discharge at Datong station decreased by half, and the freshwater resource reduced, too. The maximum salinity increased 3 times compared with the averaged one. This paper discusses the aspects of the discharges along the Yangtze River, the acute change of the discharge, the time affecting the estuary and the affection factors. At last, the conclusion is drawn that the Three Gorge reservoir filled with water reduces the fresh water resource in the Yangtae River estuary.

关 键 词：三峡水库 蓄水 长江口 淡水资源 盐度 

分 类 号：P343.5[天文地球—水文科学] TV211.1[天文地球—地球物理学]