基于Infoworks ICM的城市排水（雨水）系统排水能力及内涝风险评估

Evaluation on Drainage Capacity and Waterlogging Risk of Urban Drainage (Rainwater) System Based on Infoworks ICM

摘要:

为评估LSH流域排水（雨水）系统排水能力及其内涝风险，基于Infoworks ICM构建LSH流域的排水（雨水）系统水动力学模型，对现状排水（雨水）系统排水能力和内涝风险进行了评估，并根据评估结果对某重要区域提出相应的改造方案，然后通过模型对改造方案进行了模拟验证。结果表明，LSH流域的排水（雨水）管网达标率（满足2 a一遇）为68.4%，整体管道达标率较高。管道排水能力小于1 a一遇、1～2 a一遇、2～3 a一遇、3～5 a一遇和大于5 a一遇的管网占比分别为18.5%、13.12%、42.35%、15.38%、10.65%。LSH流域东南部区域存在较高的内涝风险。通过对沿齐州路东侧敷设1.2 m×1.2 m雨水管渠的改造方案进行模拟验证，表明该改造方案能较好的解决东广场区域的内涝积水问题。

Abstract:

In order to evaluate the drainage capacity and waterlogging risk of drainage (rainwater) system in LSH basin, a hydrodynamic model of drainage (rainwater) system in LSH basin is built based on Infoworks ICM. The drainage capacity and waterlogging risk of the current drainage (rainwater) system are evaluated, and the corresponding reconstruction scheme is proposed for an important region according to the evaluation result. And then the reconstruction scheme is simulated and verified through the model. The results show that the standard rate of drainage (rainwater) pipe network in LSH basin (meeting once every two years) is 68.4%. The rate of reaching the standard of the whole pipeline is higher. If the drainage capacities of pipeline are less than 1-year once, 1~2-year once, 2~3-year once, 3~5-year once and larger than 5-year once, the proportions of pipe network are 18.5%, 13.12%, 42.35%, 15.38% and 10.65% respectively. There is a high risk of waterlogging in the southeast of LSH basin. Through the simulation verification of the reconstruction scheme of laying 1.2 m×1.2 m rainwater pipe channel along the east side of Qizhou Road, it is shown that the reconstruction scheme can better solve the problem of waterlogging and ponding in the area of East Square.