基于MIKE21的小清河感潮河段水质数值模拟研究  

Numerical Simulation of Water Quality in Tidal Reach of Xiaoqing River Based on MIKE21

作　　者：耿玉莹 钱秀红 金炳琪 潘维艳 徐征和 窦祥洲 GENG Yuying;QIAN Xiuhong;JIN Bingqi;PAN Weiyan;XU Zhenghe;DOU Xiangzhou(School of Water Conservancy and Environment,University of Jinan,Jinan 250022,China;Haihe River,Huaihe River and Xiaoqing River Basin Water Conservancy Management and Service Center of Shandong Province,Jinan 250014,China;Dongying Hydrology Center,Dongying 257000,China)

机构地区：[1]济南大学水利与环境学院,山东济南250022 [2]山东省海河淮河小清河流域水利管理服务中心,山东济南250014 [3]东营市水文中心,山东东营257000

出　　处：《人民黄河》2024年第10期96-102,共7页Yellow River

基　　金：山东省小清河防洪综合治理工程科学研究试验项目(XQHFHZL-KY202003);国家自然科学基金资助项目(42307083);济南大学重点学科重大课题(1420715)。

摘　　要：为改善小清河感潮河段水质状况,提高水环境污染防治能力,以小清河感潮河段为研究区,利用MIKE21模型构建水动力水质耦合模型,选择主要超标污染物COD、TN、TP,利用实测水质数据对模型进行率定、验证,并模拟了不同上游来水水质、不同污染物削减条件和不同水文期突发水污染事故共3种情况下感潮河段水质变化,结果表明:经率定、验证后的水动力水质耦合模型适用于小清河感潮河段;当上游来水为Ⅳ类水时,COD、TP基本达标,TN超标,当上游来水为Ⅴ类水时都不达标,应尽量控制上游来水水质达到Ⅳ类标准,并加强流域水体TN污染治理;削减30%的点源、面源污染能够有效减少COD、TP污染,但对TN改善效果不佳;污染水团在平水期迁移过程中对水体的影响持续时间较长、浓度较大,丰水期污染物迁移速度较快,应急处理时间较少。In order to improve the water quality and the ability to prevent the risk of water environment pollution in the tidal reach of Xiaoqing River,numerical simulation of water quality was carried out in tidal reach of Xiaoqing River.The MIKE21 was used to build a hydrodynamicwater quality coupling model.The main exceeding pollutants COD,TN and TP were selected,and the model was calibrated and verified by the measured water quality data.The water quality changes of the tidal reach under three scenarios of different upstream water quality,different pollution reduction conditions and sudden water pollution in different water periods were simulated.The results show that the calibrated and validated hydrodynamic-water quality coupling model is well suitable for the tidal reach of Xiaoqing River.When the upstream water is class Ⅳ,COD and TP are basically achieved,and TN exceeds the standard.When the upstream water is class Ⅴ,none of the indicators are up to standard.The upstream water quality should be controlled within the range of class Ⅳ as much as possible,and the TN pollution control of the basin water body should be strengthened.Reducing 30% of point and non-point source pollution can effectively reduce COD and TP pollution,but the improvement effect on TN is not good.The influence of polluted water on water body lastes longer and the concentration is higher in the migration process of normal periods.In the wet period,the migration speed will be faster and the emergency treatment time will be less.

关 键 词：感潮河段 MIKE21模型 水质 水动力水质耦合模型 小清河流域 

分 类 号：X522[环境科学与工程—环境工程] TV131.2[水利工程—水力学及河流动力学]