期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2020
卷号：446
期号：3
DOI：10.1088/1755-1315/446/3/032105
语种：English
出版社：IOP Publishing
摘要：This paper is aimed at evaluating the ecological water demand of Dongting Lake in the middle reach of Yangtze River. Since Dongting Lake has evolved into a lake area connected by three waterways: Eastern Dongting Lake, Southern Dongting Lake and Western Dongting Lake, the ecological water level and ecological water demand of different lake areas must be obtained separately. In the Eastern Dongting Lake, we choose Lujiao station as the water level representative station, and choose Yingtian and Yangliutan station as the water level representative station in Southern Dongting Lake, and choose Nanzui and Xiaohezui station as the water level representative station in Western Dongting Lake. The natural water level data is used to obtain the ecological water level in different lake areas of Dongting Lake based on the ecological hydrology method, and then the ecological water demand is obtained through the lake water level-volume relationship curve. The ten-day average minimum ecological water demand of Dongting Lake from September to October is 6.042, 5.294, 4.095, 3.548, 3.139, 2.864 billion m3. The determination of the minimum ecological water demand of Dongting Lake provides a scientific basis for defining the safety status of the lake ecosystem.
