Analysis of the impact of dam operations on the river water ecological environment

被引：0
|
作者：
Zuo Q. [1 ,2 ]
Liu J. [1 ]
Dou M. [2 ]
机构：
[1] College of Water Conservancy & Environment, Zhengzhou University, Zhengzhou
[2] Center for Water Science Research, Zhengzhou University, Zhengzhou
来源：
| 1600年 / International Research and Training Center on Erosion and Sedimentation and China Water and Power Press卷 / 27期
基金：
中国国家自然科学基金;
关键词：
Dam; Dam operation; Influence characteristic; Water ecosystem; Water pollution; Water quality;
D O I：
10.14042/j.cnki.32.1309.2016.03.012
中图分类号：
学科分类号：
摘要：
Our field experiment made a thorough investigation of the influences of dam operations on the characteristics of the river water eco-environment, and studied the spatial variation of water quality at different control modes (0 m3/s, 20 m3/s, 40 m3/s and 60 m3/s). We also monitored ecological indicators to allow us to analyze the long-and short-term effects of the dam on the river water eco-environment. The results showed that a flow of 60 m3/s benefitted oxidation and decomposition of water pollutants downstream of the dam, and improved river water self-purification. An increase in disturbance of water flow promoted pollutant transfer from the sediment into the water so that a sudden pollution accident resulting from sediment disturbance downstream of the dam could easily take place. Frequent operations occurring in a relatively short period of time significantly affected the density distribution of plankton. What's more, the long-term effects of dam operations led to the development of a very simple biological community and structure, the water eco-environment deteriorated markedly, and the negative effects on the river upstream of the dam were more serious than downstream. The results of this study are useful in providing reliable information for ecological river restoration and sustainable river basin management. © 2016, Editorial Board of Advances in Water Science. All right reserved.
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页码：439 / 447
页数：8
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