Large and episodic decrease of water discharge from the Yangtze River to the sea during the dry season

被引：4

作者：

Xiqing, Chen ^{[1
]}

Erfeng, Zhang ^{[1
]}

Jiangang, Xu ^{[1
]}

机构：

[1] St. Key Lab. Estuarine/Coastal Res., East China Normal University, Shanghai 200062, China

来源：

Hydrological Sciences Journal | 2002年 / 47卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Drought - Environmental impact - Rivers - Time series analysis;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

A diagnostic study on the large and episodic decrease of discharge from the Yangtze River to the sea is presented. No trend has been detected so far in the time series of river flow recorded at Datong, but a large and short-term drop is evident through analysing the yearly minimum discharges. Water abstractions in the middle reach are evidently responsible for the large and episodic drop recorded at Datong. Downstream of Datong the discharge further decreases due to water abstraction by sluices and pumping stations, with a capacity comparable to the average discharge from Datong in dry months. Such large-scale water diversions may greatly reduce the water discharge into the sea during droughts, if countermeasures are not prepared. An increasing seasonal variability will exacerbate the existing water and environmental problems in the Yangtze Delta and estuary. An integrated management system is necessary for sustaining sufficient freshwater discharge into the sea.

引用

页码：41 / 48