生态学报2024，Vol.44Issue(15)：6487-6498,12.DOI:10.20103/j.stxb.202401020014
基于水文水力学水生态结合法的大渡河生态流量研究
Study on Ecological flow of Dadu River Based on combined hydrology-hydraulics-water ecology method
摘要
Abstract
The Dadu River is an important tributary of the upper reaches of the Yangtze River,rich in hydropower resources,with a large number of endemic and rare species in the basin,and has high ecological and economic values.Ecological flow is an important indicator to ensure the ecological environment of river and maintain the health of river,and it is of great significance to study the calculation method of the ecological flow for the ecological environmental protection and rational utilization of water resources in the Dadu River Basin.Currently,there are many studies on ecological flow.Based on the natural flow discharge in the middle and lower reaches of the Dadu River from 2008 to 2017,this paper selected the Tennant method and the improved Tennant method in the hydrological method,the wet cycle method in the hydraulics method,and habitat suitability method,and proposed a combination method of hydrology,hydraulics,and aquatic ecology(hereinafter referred to as the combined method).The ecological flow calculated by the combined method was compared with the multi-year measured flow.Then the months that needed to be replenished were determined.The ecological flow of the Dadu River was compared with the fourth batch of ecological flow guarantee targets of key rivers and lakes issued by the Ministry of Water Resources.The results showed that the combined method took into account the needs of hydrological,hydraulic and fish breeding in different months to meet the ecological needs of the rivers.The flow discharge of Luding Station in the middle and lower reaches of the Dadu River in February-April and Shawan Station in February could not meet the ecological water demand,so ecological water replenishment should be carried out to make the river flow meet the requirements of fish reproduction.Compared with the ecological flow target of the Dadu River set by the Ministry of Water Resources,the ecological flow calculated in this article is higher than the target during the fish breeding period and lower than the guarantee target during the non-fish breeding season.The combined method proposed in this paper considers the annual difference of river ecological water demand,and the calculation method is simple and practical,and the calculation of the ecological flow of the Dadu River can provide a scientific basis for ecological water replenishment within the year.关键词
生态流量/大渡河/水文学法/水力学法/结合法Key words
ecological flow/the Dadu River/hydrological method/hydraulics method/combined method引用本文复制引用
薛笑薇,苗蔚,欧延静,张尚弘,尹世洋,林小楠..基于水文水力学水生态结合法的大渡河生态流量研究[J].生态学报,2024,44(15):6487-6498,12.基金项目
国家重点研发计划项目(2022YFC3202003) （2022YFC3202003）
国家自然科学基金青年项目(52109084) （52109084）
中央高校基本科研业务费专项资金(2023MS066) （2023MS066）
