基于ANUGA和SWMM耦合模型的车陂涌流域内涝模拟分析

为探究设计暴雨雨峰位置对城市内涝的响应规律，以广州车陂涌流域某片区为研究区，基于ANUGA和SWMM构建耦合模型AGSWM,采用实测降雨的流量和内涝数据对AGSWM进行验证，并对不同雨峰位置的设计暴雨情景进行了内涝模拟与分析。结果表明：耦合模型AGSWM具有良好的模拟精度，能够较好地反映车陂涌内涝时空演进过程；在低重现期后峰情景和高重现期中峰情景下，内涝积水总量、总淹没面积、重度内涝等级的淹没面积和重度内涝等级的易涝点最大水深较大；在低重现期前峰情景、高重现期后峰情景下，积水峰现延迟时间较长。

Simulation analysis on Chenbei watershed waterlogging based on ANUGA and SWMM coupling model

In order to explore the law of urban waterlogging response to the designed position of rain peak during storm, taking a certain area in the Chebei watershed in Guangzhou as an example, a coupled model AGSWM was constructed based on ANUGA and SWMM model, and verified with measured rainfall and waterlogging data. The waterlogging simulation analysis was carried out for the designed storm scenarios with different rain peak positions. The results showed that the AGSWM has good simulation accuracy and is able to reflect the temporal and spatial evolution of Chenbei watershed waterlogging properly. Under the post-peak scenario during low return period and the mid-peak scenario during high return period, total amount of accumulated water, total inundated area, submerged area with severe waterlogging and maximum water depth of severe waterlogging-prone points are relatively large. Under the pre-peak scenario during the low return period and the post-peak scenario during the high return period, the delay of peak of water accumulation are relatively large.