| 摘要: |
| 首届中国国际进口博览会于2018年11月在上海市国家会展中心举办，区域河网动力弱、入河污染负荷强，周边河道小涞港于2017年刚脱离黑臭，亟需提升区域水环境。采用数值模拟与现场试验运行相结合的方法，开展水环境提升方案研究。针对进博会及周边区域水质差、水体浑浊、水动力弱等问题，采用控源截污、生态修复、活水畅流等措施，新建三座装配式溢流堰，形成三级水位和活水循环的水网动力格局，促进了进博会区域循环净水-生态修复的良性循环。运行监测结果表明，核心区小涞港透明度大于1.5m，重点区大于1.2m，主要水质指标由Ⅴ-劣Ⅴ类提升至Ⅱ-Ⅲ类。运行效果评估结果表明，控源截污对水质提升起主要作用，占73%；活水畅流与生态修复对水质提升贡献占比分别为15%和12%。 |
| 关键词: 中国国际进口博览会、水环境提升、活水循环、生态修复、水质提升贡献率 |
| DOI： |
| 分类号: |
| 基金项目: |
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| Improvement and Effect Evaluation of River Network Water Environment in China International Import Expo Area |
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Ding Rui
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Nanjing Hydraulic Research Institute
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| Abstract: |
| The 1st China International Import Expo (CIIE) is held in National Exhibition and Convention Center (NECC) Shanghai in November 2018. The hydrodynamic of river network in CIIE area is weak, and the pollution discharge into river is heavy, especially the Xiaolaigang river just divorced from malodorous black in 2017. It’s quite essential to improve the water enviromment in CIIE Area. Water enviromment improve Schemes were studied based on numerical simulation and field test. Pollution intercepting, ecological restoration and hydrodynamic improvement were adopted to slove the problem of bad water quality, water turbidity and weak hydrodynamic in CIIE area. Three fabricated downflow weir were built to form cascade water level and water circulation, promoting the ecological restoration and hydrodynamic improvement. The result of operation monitoring indicated that the transparency of Xiaolaigang river core area was greater than 1.5m, the transparency of key area was greater than 1.2m. Main water quality indicator promoted fromⅤ- exceedⅤto Ⅱ-Ⅲ. Effect Evaluation indicated that pollution intercepting play an important role in water environment improvement, about 73% proportion. The proportion of hydrodynamic improvement and ecological restoration in water environment improvement was about 15% and 12%. |
| Key words: China International Import Expo, water environment improvement, water circulation, ecological restoration, water quality improve contribution rate |
