基于水力水文学法的大渡河上游生态流量确定

利用湿周法、Tennant法、Tessman法、逐月最小径流法分别计算大渡河上游的最小生态流量,并通过鱼类繁殖产卵所需的流量验证4种方法的合理性.结果表明,Tennant法、Tessman法、逐月最小径流法能保证足木足断面鱼类繁殖产卵所需的最低流量,大金断面4种方法均能满足.推荐3-8月采用Tennant法,9月至次年...

Determination of ecological flow in upstream of Daduhe River based on hydraulic and hydrological methods

The wetted perimeter method, Tennant method, Tessman method and month-by-month minimum ecological runoff calculation method were used to calculate the ecological flow respectively. The flow required for fish breeding and spawning was applied to verify the rationality of the four methods. The results show that the Tennant method, Tessman method, and month-by-month minimum ecological runoff calculation method can ensure the minimum flow required for the fish breeding and spawning at the Zumuzu cross section and all the four methods can ensure the minimum flow required at the Dajin section. Tennant method is recommended from March to August and the wetted perimeter method is suggested to use from September to February. The minimum ecological flow process can meet the requirements of fish and habitat protection, and has the smallest impact on human water intake, which can provide reference for the determination of ecological flow.