基于MIKE11-Ecolab河网模型溶解氧异常原因研究  

Attribution analysis of dissolved oxygen anomalies based on MIKE11-Ecolab river network modeling

作　　者：王治昊 逄勇[1,2] 张丽亭 刘佳蓓 WANG Zhihao;PANG Yong;ZHANG Liting;LIU Jiabei(Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes,Ministry of Education,Hohai University,Nanjing 210098,China;College of Environment,Hohai University,Nanjing 210098,China)

机构地区：[1]河海大学浅水湖泊综合治理与资源开发教育部重点实验室,江苏南京210098 [2]河海大学环境学院,江苏南京210098

出　　处：《水资源与水工程学报》2025年第1期54-62,共9页Journal of Water Resources and Water Engineering

基　　金：国家自然科学基金项目(51879070)。

摘　　要：为进一步了解溶解氧浓度异常变化原因和量化分析溶解氧异常修复措施的效果,将数学统计方法与水环境数学模型相结合,以江苏省盐河为研究对象,通过对溶解氧浓度与相关水质因子、降雨量数据进行皮尔逊相关性分析确定主要影响因子,建立与相关性分析相匹配的MIKE11-Ecolab耦合模型,对比不同修复措施对河网溶解氧浓度的修复效果。研究结果表明:溶解氧浓度与水温、降雨量、高锰酸盐指数及生化需氧量呈显著负相关关系,水温、降雨径流污染和光合作用效率对溶解氧浓度影响程度最大,水温升高20%后溶解氧浓度下降了53.68%,削减50%雨水径流污染后溶解氧浓度可改善26.48%,光合作用效率提高50%后溶解氧浓度可改善16.43%。研究成果可为河网地区水生态修复提供经验参考和理论依据。Statistical methods were combined with mathematical modelling to analyze the causes of the abnormal changes in dissolved oxygen concentration,and the effects of restoration measures on dissolved oxygen anomalies in water environment.Taking the Yanhe River in Jiangsu Province as the case study,we analyzed dissolved oxygen concentration,related water quality factors,and rainfall data using Pearson correlation analysis,so as to identify the main influencing factors.Then,the corresponding MIKE11-Ecolab coupled model was established to compare the effects of different restoration measures on the dissolved oxygen concentration of the river network.The results showed that dissolved oxygen concentration was significantly and negatively correlated with water temperature,rainfall,permanganate index,and biochemical oxygen demand.Water temperature,stormwater runoff pollution,and photosynthetic efficiency had the greatest impact on dissolved oxygen.With an increase of 20%in water temperature,dissolved oxygen concentration decreased by 53.68%;a reduction of 50%in stormwater runoff pollution led to an improvement of 26.48%in dissolved oxygen concentration;an increase of 50%in photosynthetic efficiency improved the dissolved oxygen concentration by 16.43%.This study can provide a reference and theoretical basis for water ecological restoration in river network areas.

关 键 词：水质 溶解氧浓度 溶解氧异常修复 MIKE11-Ecolab耦合模型 盐河 江苏省 

分 类 号：X522[环境科学与工程—环境工程] S959[农业科学—水产养殖]