研究报告
丁一,贾海峰,丁永伟,孙朝霞.基于EFDC模型的水乡城镇水网水动力优化调控研究[J].环境科学学报,2016,36(4):1440-1446
基于EFDC模型的水乡城镇水网水动力优化调控研究
- Hydrodynamic optimization of urban river network of water towns based on EFDC model
- 基金项目：国家水体污染控制与治理科技重大专项(No.2011ZX07301-003)
- 作者
- 单位
- 丁一
- 清华大学环境学院, 北京 100084
- 贾海峰
- 清华大学环境学院, 北京 100084
- 丁永伟
- 苏州市排水管理处, 苏州 215000
- 孙朝霞
- 清华大学环境学院, 北京 100084
- 摘要：河流的水动力状态与整体水环境状况息息相关.本研究以同里古镇区水系为例,在数据稀缺,尤其是缺乏水质数据的基础上,通过研究区域实地考察、现场监测、文献调研等方式,确定了研究区域合理的生态流速范围.同时,建立了同里古镇区水系的EFDC水动力模型,并采用情景分析法,对古镇区水系8种不同的调水优化情景进行分析评价.结果表明,当进水泵站以0.42m3·s-1,饮马桥同时以0.5m3·s-1的流量进水,大东溪桥和会川桥出流口各出流10%,外河闸口出流口出流80%,其余出流口不出流的情况下,同里古镇区水系整体水动力改善条件较好,且大部分河段流速维持在0.05~0.10m·s-1之间,在同里古镇水系合理的生态流速范围内.这一方案不仅能有效改善同里古镇水系整体水动力状态,且对水质状况的改善,对整体水环境的提升具有良好的促进作用.
- Abstract：Hydrodynamic condition is closely related to water environment condition. Taking the river network of Tongli water town as an example, a reasonable ecological velocity range for urban rivers was derived through field investigation, field monitoring and literature review. An EFDC-based hydrodynamic model of Tongli's river network was developed. 8 scenarios were designed and analyzed using the developed model. The scenarios analysis showed that the river network of Tongli town was in a better hydrodynamic condition when the inflow was 0.42 m3·s-1 at water pump station and 0.5 m3·s-1 at Yinma bridge station and the outflows were 10% of total inflow at both Dadongxi bridge and Huichuan bridge and 80% at water gate. In this scenario, the velocities of most channel segments were between 0.05~0.10 m·s-1, which was considered a reasonable range of velocity for river network of Tongli town.
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