基于水动力水质耦合模型的城市河湖生态补水方案——以武汉市东沙湖水系为例  

Ecological Water Replenishment Scheme for Urban River and Lake Based on Hydrodynamic and Water Quality Coupling Model:A Case Study of Donghu-Shahu Lake Water System in Wuhan City

作　　者：谢珊 钱晓燕 向碧为 杨森 李二明 XIE Shan;QIAN Xiaoyan;XIANG Biwei;YANG Sen;LI Erming(Wuhan Institute of Water Affairs Science Research(Wuhan Water and Soil Conservation Monitoring Station),Wuhan 430010,China;Ewaters Environmental Science and Technology(Shanghai)Co.,Ltd.,Shanghai 200030,China)

机构地区：[1]武汉市水务科学研究院(武汉市水土保持监测站),湖北武汉430010 [2]宜水环境科技(上海)有限公司,上海200030

出　　处：《长江技术经济》2024年第5期38-44,共7页Technology and Economy of Changjiang

摘　　要：研究城市河湖生态补水对于城市的可持续发展以及满足人们的生活需求具有重要意义。沙湖港、罗家港位于武汉中心城区,是东沙湖水系引江济湖的引水通道。结合东沙湖水系整体布局和水系连通的情况,研究探讨了从长江引水补充沙湖港、罗家港的生态补水方案,通过建立二维水动力水质耦合数值模型,模拟沙湖港、罗家港生态补水方案的运行效果。结果表明,从武钢泵站引长江水,罗家港、沙湖港(青山港—罗家港段)TP和NH3-N浓度显著降低,沙湖港(徐东大街—罗家港段)虽然得到了一定程度的换水,但该段水质改善效果极其微弱。由于长江水质的TN、TP含量较高,生态补水对于降低TN浓度的效果非常有限,在利用长江补水进港渠时,还需要防止长江水带来富营养化风险。相关研究成果可为定量评估城市河湖生态补水效果提供借鉴。Ecological water replenishment of urban rivers and lakes is of significant importance for the sustainable development of cities and meeting people's living needs.Shahu Port and Luojia Port are located in central urban area of Wuhan and serve as water diversion channels for Donghu-Shahu Lake water system in river diversion project from the Yangtze River to the Lakes.This paper explores the ecological water replenishment scheme for diverting water from the Yangtze River to the Shahu Port and Luojia Port,taking into account the overall layout of Donghu-Shahu Lake water system and its connection.A two-dimensional hydrodynamic and water quality coupling numerical model is established to simulate the operation effects of ecological water replenishment scheme.Results indicate that concentration of total phosphorus and NH3-N decrease significantly in Luojia Port and Shahu Port(from Qingshan Port to Luojia Port section)when diverting water from Wuhan Iron and Steel Pump Station.Although there is a certain degree of water exchange in Shahu Port(from Xudong Street to Luojia Port section),the improvement of water quality in this section is extremely limited.Due to the high concentration of total nitrogen and total phosphorus in the Yangtze River,effect of ecological water replenishment on reducing total nitrogen concentration is very limited.Therefore,it is necessary to prevent the risk of water eutrophication when diverting water from the Yangtze River to port channels.The research findings can provide a reference for the quantitatively assessment of ecological water replenishment of urban rivers and lakes.

关 键 词：生态补水方案 水动力水质耦合模型 武汉市 

分 类 号：TV211[水利工程—水文学及水资源]