【摘要】 河流生态流量是维持河流生态系统健康的重要的条件。选取长江荆江三口(虎渡口、藕池口、松滋口)作为控制性断面,采用年内展布法和IHA-RVA法计算分析了河道最小和适宜生态流量,并利用Tennant法进行了合理性验证。其中,最小生态流量分别为264.3、241.3、680 m~3/s,分别占多年平均天然流量的44.4%、16.4%、46.9%;虎渡口、藕池口、松滋口三个断面的适宜生态流量分别为409.5、613.2、1 017.2 m~3/s,分别占多年平均天然流量的68.8%、41.7%、70.1%。本研究所采用计算方法计算的生态流量结果能够满足河流生态目标的需求,与天然河流年内丰枯变化状态相吻合,计算结果较为合理。该研究可为荆江三口的水资源管理以及生态系统的保护和恢复提供科学依据。更多还原

【Abstract】 River flow is the most important condition of the benign cycle of the ecological environment. This paper selects three outlets(Hudukou, Ouchikou, Songzikou) as the control sections, the minimal ecological flow by year distribution calculation method, IHA-RVA method is used to calculate the river optimal ecological flow, and prove the rationality of using the Tennant Method, according to the three outlets status and history of hydrology analysis of ecological water level of protection. The calculation results show that the hudukou, Ouchikou and Songzikou outlets of the minimal ecological flow is 264.3, 241.3, 680 m~3/s, respectively, the average natural flow 44.4%, 16.4%, 46.9%. Hudukou, Ouchi and Songzi outlet of optimal ecological flow is 409.5, 613.2, 1 017.2 m~3/s, respectively, the average natural flow 68.8%, 41.7%, 70.1%. The results will provide a scientific basis for the rational management and management of water resources and the protection and restoration of the ecosystem.更多还原