张祖鹏,张泽贤,刘思远,桑静,董鑫晟

• 1:浙江省长兴县水利局
• 2:华北电力大学环境科学与工程学院

摘要(Abstract)：

【目的】长兴港是太湖流域重要的城市河流，对其开展生态流量研究并确定合理的生态流量管控值，对保障长兴港水生态环境健康、提高当地人民群众幸福指数具有重要意义。【方法】以长兴港新塘断面2016—2020年的逐月水生态监测数据为对象，明确了长兴港非汛期、汛期的水环境约束指标；并基于MIKE 11软件，构建了一维水动力-水环境耦合模型；从保障水生态环境质量、缓解水华爆发的营养条件的角度出发进行了生态流量研究。【结果】结果显示：长兴港非汛期约束指标为NH_3-N、COD_(Mn)和BOD,汛期约束指标为NH_3-N、TP和COD_(Mn);通过对比实测数据与模拟数据可知，水位、流量的模拟值与实测值间的■均小于10%,R~2和Nash-Suttcliffe系数分别大于0.6和0.9,各时期的水环境主要管控指标的模拟值与实测值间的■均小于17%;最终计算得到长兴港非汛期和汛期合理的生态流量管控值分别为2.59 m~3/s和2.63 m~3/s。【结论】结果表明：研究构建的一维水动力-水环境耦合模型符合长兴港的实际情况，能够应用于长兴港生态流量研究，可以解决水动力和水环境模块单独使用不能表征河流特点的问题，为河流生态流量的研究和管控提供了更为科学、高效的工具；研究提出的生态流量管控值具有可达性，可切实有效地改善长兴港水生态环境、抑制水华爆发并为长兴港的生态流量管控和“幸福河”构建等工作提供理论与技术支撑。

关键词(KeyWords)： 环境科学;生态流量管控;水动力-水环境耦合模型;MIKE 11;长兴港

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(52122902);; 水利部水资源管理中心省级重点项目“典型水利工程取放水过程分析评估”(KH21010234)

作者(Author): 张祖鹏,张泽贤,刘思远,桑静,董鑫晟

DOI: 10.13928/j.cnki.wrahe.2023.10.014

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