数值建模排水系统堵塞对城市洪水过程的影响
Xiaojie Wang1, Junqiang Xia1, Jiheng Feng1
1State Key Laboratory of Water Resources Engineering and Management, Wuhan University, Wuhan, 430072, China.
Journal of environmental management
|May 28, 2025
概括
城市洪水因堵塞的排水系统而恶化. 这项研究使用了合的1D/2D模型来展示堵塞如何增加洪水面积和深度,影响城市洪水风险管理.
科学领域:
- 环境工程 环境工程
- 水文学的水文学
- 城市规划 城市规划
背景情况:
- 城市洪水是一个重大挑战,而排水能力受损却加剧了这一问题.
- 街道入口和管道的堵塞是降低城市排水效率的主要因素.
研究的目的:
- 调查排水系统堵塞对城市洪水过程的影响.
- 分析城市洪水的应对机制,以不同程度和位置的堵塞.
主要方法:
- 开发了一种合的1D/2D水力动力模型,将风暴水管理模型 (SWMM) 的1D管道网络模块与2D表面排水模块集成在一起.
- 该模型使用实验室实验来验证,该实验室实验模拟了在一条有排水系统的街道上模拟城市洪水.
- 对武汉城市的城市洪水进行了模拟,以评估街道入口和管道堵塞的影响.
主要成果:
- 模型对地表水位和管道排放的预测与实验数据 (NSE > 0.92) 密切匹配.
- 降雨回归周期的增加导致了更大的洪水面积和更多的加费管道/接口,以及更早的峰值加费.
- 排水系统的堵塞显著增加了洪水淹没面积和深度,严重程度与堵塞程度成比例.
结论:
- 街道入口和管道的堵塞直接增加了城市洪水的严重程度,特定地区经历了显著的深度增加.
- 严重受影响的区域通常是那些在正常条件下已经存在过载管道和接口的区域.
- 这些发现为改进城市排水系统设计和加强洪水风险管理策略提供了科学基础.
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