摘要
探讨了河道生态流量基本理论方法,针对长江中下游河道实际情况,选取宜昌站和汉口站作为控制性断面,采用改进河道湿周法计算长江中下游各河段最小生态流量,进一步根据鱼类产卵繁殖所需流速,估算了长江中下游各河段的适宜生态流量,并利用Tennant法对计算结果进行了分析评价。计算结果为,宜昌、汉口站断面的最小生态流量为2315m3/s3、124m3/s,分别占多年平均天然流量的16.7%、13.8%;宜昌、汉口站断面的适宜生态流量为8154.7m3/s1、6663m3/s,分别占多年平均天然流量的65.7%、73.6%。该研究结果为长江中下游的河流生态环境保护及水资源科学配置提供了参考。
The basic theory and methods of ecological flow in river channels are discussed.Based on the factual condition of the middle and lower reaches of the Yangtze River,Yichang and Hankou Hydrological Station as the control transects are choused.The improved wetted perimeter method is applied to determine minimum ecological flow of the middle and lower reaches of the Yangtze River and optimal ecological flows of the reaches are also calculated by applying the required velocity of fish spawning.The calculating re...
出处
《水利学报》
EI
CSCD
北大核心
2007年第S1期619-623,共5页
Journal of Hydraulic Engineering
基金
国家自然科学基金重大项目资助课题(30490235)
关键词
长江中下游
最小生态流量
适宜生态流量
湿周法
the middle and lower reaches of the Yangtze River
minimum ecological flow
optimal ecological flow
improved wetted perimeter method
