摘要
河湖生态基流目前还没有统一的定义,估算方法众多;应根据流域实际情况选用合适的计算方法。水利部珠江水利委员会在《东江生态流量实施方案》中推荐了8种用于生态基流计算的水文学方法,但计算结果存在很大差异;以东江上游2个小流域为研究对象,从中寻找一个最适合东江小流域的生态基流计算方法。首先,基于监测断面的历史流量数据,分别采用8种方法计算相应的生态基流。继而,通过主、客观赋权方法的比选,赋予8种方法合适的权重;从而综合利用它们的计算成果得到生态基流的理想方案。最后,通过分析8种方法的结果与理想方案的贴近度,优选出1种最佳方法。结果表明,月流量变动法适合东江小流域的生态基流计算;南方丰水型小流域的生态基流计算,可以优先考虑月流量变动法。
Nowadays,there is no clear and unified definition of ecological base flow of rivers,and there are many estimation methods.The appropriate calculation method should be selected according to the actual situation of the basin.In the implementation plan for ecological flow of Dongjiang River prepared by the Pearl River Water Resources Commission of the Ministry of Water Resources,eight hydrological methods for calculating ecological base flow are recommended,but their calculation results are very different.In this paper,two small basins in the upper reaches of the Dongjiang River is taken as the research object to find an ecological base flow calculation method which is most suitable for small basin of Dongjiang River.First,eight methods are used to calculate the corresponding ecological base flow based on the historical flow data of the monitored sections.Second,eight methods are given appropriate weights based on the comparation between subjective and objective weighting methods.Thus,the ideal scheme of ecological base flow can be obtained by comprehensively utilizing their calculation re⁃sults.Finally,an optimal method is selected by analyzing the closeness between the results of eight methods and the ideal scheme respective⁃ly.The results indicate that:①The monthly flow variation method is suitable for the calculation of ecological base flow in the small basin of Dongjiang River.②The monthly flow variation method can give priority to the calculation of ecological base flow in small basin with abundant water in South China.
作者
曹涛涛
李燕磊
余菁
王文鹏
邹鉒
涂龙杰
唐明
CAO Tao-tao;LI Yan-lie;YU Jing;WANG Wen-peng;ZOU Zhu;TU Long-jie;TANG Ming(Jiangxi Provincial Hydrology Monitoring Center,Nanchang 330038,Jiangxi Province,China;School of Hydraulic and Ecological Engineering,Nanchang Institute of Technology,Nanchang 330099,Jiangxi Province,China;Jiangxi Key Laboratory of Hydrology-water Resources and Water Environment,Nanchang 330099,Jiangxi Province,China)
出处
《中国农村水利水电》
北大核心
2023年第5期34-40,共7页
China Rural Water and Hydropower
基金
江西省水利厅科技项目(202123YBKT20)。
关键词
生态基流
贴近度
月流量变动法
东江
小流域
ecological base flow
closeness degree
monthly flow variation method
Dongjiang River
small basin
