水资源保护2025，Vol.41Issue(5)：41-51,11.DOI:10.3880/j.issn.1004-6933.2025.05.005
快速城市化对城市内涝特征的影响分析
Analysis of impact of rapid urbanization on characteristics of urban waterlogging
摘要
Abstract
To investigate the impact of urbanization on regional waterlogging,taking the Nangang River Basin in Guangzhou as the study area,a coupled one-and two-dimensional hydrological-hydrodynamic model was constructed based on the SWMM and WCA2D models,and the flood inundation response patterns under different rainfall return periods before and after urbanization were analyzed.The results show that the simulated one-dimensional river water levels and two-dimensional inundation extents are in good agreement with the observed data,demonstrating that the proposed model has good applicability in the study area.From 1990 to 2020,the built-up area in the Nangang River Basin increased by 4.1 times.The expansion of impervious surfaces led to higher peak discharges at outlets,larger runoff coefficients,earlier occurrence of flood peaks,an increased number of overflow points,and a significant increase in inundation areas.Compared with the pre-urbanization scenario,the inundated areas under rainstorms with 1-,20-,and 100-year return periods increased by 4.2,1.1 and 0.5 times,respectively,after urbanization.The expansion of impervious surfaces has significantly exacerbated flood risks and further weaken the urban flood control and drainage capacity.关键词
暴雨内涝/城市化/水文水动力模型/WCA2D模型/SWMM模型/南岗河流域Key words
rainstorm waterlogging/urbanization/hydrological and hydrodynamic model/WCA2D model/SWMM model/the Nangang River Basin分类
建筑与水利引用本文复制引用
王兆礼,孟德胜,廖耀星,陈昱宏,卢义亮..快速城市化对城市内涝特征的影响分析[J].水资源保护,2025,41(5):41-51,11.基金项目
国家自然科学基金项目(52379010) （52379010）
广东省基础与应用基础研究基金项目(2022A1515240071) （2022A1515240071）
云南省省市一体化专项(202202AH21007) （202202AH21007）
