| 引用本文: | 韦骏成,葛 阳,位 帅,等.不同降雨情景下LID雨洪调控措施效果模拟评估[J].灌溉排水学报,2026,45(4):98-107. |
| WEI Juncheng,GE Yang,WEI Shuai,et al.不同降雨情景下LID雨洪调控措施效果模拟评估[J].灌溉排水学报,2026,45(4):98-107. |
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| 摘要: |
| 【目的】研究不同降雨情景对低影响开发（LID）设施雨洪控制效果的影响。【方法】基于SWMM模型，以广州大坑河流域为研究区域，采用芝加哥雨型，布设下沉式绿地、雨水花园、绿色屋顶、透水铺装4种LID设施，对比1、2、5、10、20、50 a共6种重现期下相同改造面积不同设施的径流控制效能。【结果】①随着重现期增大，不同方案对径流的控制效果总体呈衰减趋势，LID设施对高重现期降雨的缓冲能力有限；②各方案径流控制效果表现为雨水花园≈透水铺装＞LID2＞LID1＞下沉式绿地＞绿色屋顶，雨水花园与透水铺装径流总量削减能力突出，组合方案在优化径流时间分布上更具优势；③雨峰提前会加剧径流“快涨慢消”特征，增加洪峰控制难度，削弱雨洪控制效果。【结论】降雨重现期与雨峰特征显著影响LID设施的雨洪控制效能，其中雨水花园与透水铺装对径流总量的削减效果突出，组合方案在优化径流时间分布方面优势显著。 |
| 关键词: SWMM模型；低影响开发；雨洪控制效果；雨峰系数 |
| DOI：10.13522/j.cnki.ggps.2025218 |
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| 基金项目: |
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| Simulation and evaluation of low-impact development stormwater control under varying rainfall scenarios |
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WEI Juncheng, GE Yang, WEI Shuai, KANG Zheng, FU Tiewen, LIU Zhiyong
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1. Center for Water Resources and Environment, School of Civil Engineering, Sun Yat-sen University, Guangzhou 510275, China;
2. Zhongshan Water Supply Affairs Center, Zhongshan 528400, China; 3. Zhuhai Water Affairs Bureau, Zhuhai 519000, China
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| Abstract: |
| 【Objective】With rapid urbanization increasing stormwater runoff and flood risk, low impact development (LID) measures have become an effective approach for urban stormwater management. This paper investigates the impact of various rainfall scenarios on the stormwater control efficiency of LID facilities.【Method】The study was based on the storm water management model (SWMM) and the Chicago storm hyetograph. Taking the Dakeng River Basin in Guangzhou as the study area, we investigated and compared the efficiency of four types of LID facilities: sunken green spaces, rain gardens, green roofs, and permeable pavements, in controlling runoff for the same renovation area under six return periods: 1, 2, 5, 10, 20 and 50 years.【Result】①As the return period increases, the overall control efficiency of all LID types decreased, suggesting the limited buffering capacity of LID facilities against extreme rainfall events. ②The control efficiency of the LID types was ranked as follows: rain garden ≈ permeable pavement＞LID2＞LID1＞sunken green space＞green roof. Rain gardens and permeable pavements were most effective in reducing total runoff, while the combined schemes excelled in optimizing the temporal distribution of runoff. ③Earlier rainfall peaks amplified the rapid rise and slow recession of runoff, increasing the difficulty of peak flow control and reducing the overall stormwater control efficiency.【Conclusion】Both rainfall return period and peak characteristics significantly influenced the stormwater control efficiency of LID facilities. Among the 6 types of LID facilities we compared, rain gardens and permeable pavements were most effective in reducing total runoff, whereas the combined schemes were superior in optimizing temporal runoff distribution. These findings provide valuable guidance for the design and optimization of urban stormwater management systems. |
| Key words: SWMM model; low impact development; stormwater control efficiency; rainfall peak coefficient |
