| 摘要: |
| 为探寻城市河网水动力提升对水环境改善的影响，评估引水调流效益，以苏州古城区河网为例，在夏季丰水期条件下通过对不同流量引水条件下数条河流水动力及水质的监测和分析，探讨水动力作用对河网水体的水质改善效果。结果表明，在汛期允许最佳引流条件下，苏州齐门河、平门河及学士河的污染物通量分别下降了15.2%，16.5%和13.2%，其中古城区北部河网水环境改善情况明显高于南部河网。引水调流方案能够有效增强古城河网流动性，而河网水体中COD和溶解氧含量在不同水动力条件下的变化较为敏感，可以作为古城区河网典型水质指标参数，反映水动力调控的影响效果。 |
| 关键词: 城市河网 引水调流 水质改善 效益评估 |
| DOI：10.12170/201905003 |
| 分类号:X820;X52 |
| 基金项目:国家重点研发计划资助项目（2016YFC0401507,2016YFC0401503);江苏省水利科技重大技术攻关项目（2016005，2016009）;水体污染控制与治理科技重大专项（2017ZX07205 03 04） |
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| Study on water quality changes of river work in Suzhou ancient city under summer drainage conditions |
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LIAO Yipeng,ZHOU Yulin,FAN Ziwu,JIA Benyou,LI Yun
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1.Nanjing Hydraulic Research Institute, Nanjing;2.Hohai University, Nanjing;3.River Management Office of Suzhou, Suzhou
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| Abstract: |
| The Suzhou river network was taken as an example to explore the influence of hydrodynamic enhancement of urban river network on water environment improvement and evaluate the benefit of water diversion project under the conditions of summer flood season.In this study, by monitoring and analyzing the hydrodynamics and water quality of several rivers under different flow conditions, the improvement effect of hydrodynamics on water quality of the river network was discussed.The results show that under maximum open drainage conditions, the pollutant flux of the Qimen River decreased by 15.2%, the Pingmen river decreased by 16.5%, and the Xueshi River decreased by 13.2%. The north network was more improved than the south one.The enhancement scheme can effectively increase the mobility of the river network. The concentration of COD and dissolved oxygen in the river network water is sensitive under different hydrodynamic conditions, and can be used as a typical water quality index parameter for the river network in the city area, to reflect the influence of hydrodynamic regulation. |
| Key words: urban river network water diversion water quality benefit evaluation |
