摘要
为定量分析鄱阳湖水利枢纽工程的建设运行对鄱阳湖不同水域范围滞留时间的影响,基于鄱阳湖实测水文地貌基础资料,将鄱阳湖水域分为6个不同的水文地貌计算区域;在此基础上,构建鄱阳湖二维水动力数值模型,并耦合对流扩散方程开展典型水文年计算。结果表明,典型年份有无水利枢纽影响下,冬季平均流速均高于秋季平均流速,同时冬季流速变异性高于秋季流速变异性。枢纽调度下流速的空间异质性降低,流速降低。基于分区的滞留时间分析表明,鄱阳湖Ⅴ区滞留时间最短,秋季鄱阳湖Ⅲ区滞留时间最长,冬季鄱阳湖Ⅳ区滞留时间最长。在水利枢纽调度情况下,鄱阳湖Ⅰ、Ⅱ、Ⅲ、Ⅳ区滞留时间影响较大,而Ⅴ、Ⅵ区影响较小,研究成果可为湖区水体的生态环境研究与管理提供参考。
In order to quantitatively analyze the impact of the Poyang Lake Hydraulic Project on the residence time of diverse water area range,the water area was divided into six subzones based on the measured topographic data of Poyang Lake.At the same time,a 2 D hydrodynamic model was combined with advection-dispersion equation to simulate the residence time of Poyang Lake under the typical hydrological year.The results show that the average flow velocity in winter is higher than that in autumn,and the spatial heterogeneity of winter flow velocity is higher than that in autumn.The spatial heterogeneity and the flow velocity are reduced under the influence of the hub operation.The shortest residence time of zone is Ⅴ,and the longest residence time of zone is Ⅲ in autumn and Ⅳ in winter.Under the hub operation,the residence time of Poyang Lake Zone Ⅰ,Ⅱ,Ⅲ,and Ⅳ has a greater impact,while the Zone Ⅴ and Ⅵ has less impact.The research results are conductive to further research and management of the ecological environment of water in lake area.
作者
叶群
计勇
吴培军
王寅
温英英
王凯
YE Qun;JI Yong;WU Pei-jun;WANG Yin;WEN Ying-ying;WANG Kai(The School of Hydraulic and Ecological Engineering,Nanchang Institute of Technology,Nanchang 330099,China;Poyang Lake Hydro Project Construction Office of Jiangxi Province,Nanchang 330046,China)
出处
《水电能源科学》
北大核心
2021年第2期13-17,共5页
Water Resources and Power
基金
江西省水利厅科技项目(KT201638)
江西省科技厅科技项目(20142BAB213024,20171ACB21050,20182BCB22013)
国家自然科学基金项目(51579127,51769015)。
关键词
鄱阳湖
水利枢纽工程
水动力
滞留时间
分区
Poyang Lake
hydraulic project
hydrodynamic
residence time
subzone
