城市雨水管网内非恒定流数值模拟与内涝风险预测模型构建

Numerical Simulation of Unsteady Flow in Urban Stormwater Networks and Construction of a Waterlogging Risk Prediction Model

摘要: 随着城市化进程的加快，城市雨水径流迅速汇入排水管网，使得非恒定流现象频发，城市内涝问题日趋严重。本文根据城市雨水管网非恒定流特性，建立高精度数值模拟方法，并在模拟结果基础上构建内涝风险预测模型，实现雨洪管网的动态响应和风险分布分析功能。以典型城市低洼区域为例进行验证，模型能够实现高风险节点和易涝区的准确识别，为管网优化设计、运行调度和防涝设施布局提供科学依据。研究结果对于提升城市排水系统的韧性，实现雨洪精细化管理具有重要的理论意义和应用价值。

Abstract: With the acceleration of urbanization, urban stormwater runoff is rapidly entering the drainage network, resulting in frequent unsteady flow and increasingly serious urban waterlogging. This paper establishes a high-precision numerical simulation method based on the unsteady flow characteristics of urban stormwater networks. Based on the simulation results, a waterlogging risk prediction model is constructed to analyze the dynamic response and risk distribution of stormwater networks. Validated using a typical low-lying urban area, the model accurately identifies high-risk nodes and flood-prone areas, providing a scientific basis for optimizing network design, operational scheduling, and the layout of flood control facilities. The results have important theoretical and practical significance for improving the resilience of urban drainage systems and achieving refined stormwater management.