The frequent occurrence of urban waterlogging disaster,became a serious threat to the city's normal life and production activities. Accurately and effectively determining the distributed of urban waterlogging area can provide an intui-tive decision reference for urban rainstorm waterlogging disaster prevention and mitigation. This research based on the urban surface model,considering topographic factors,combined with the GIS technology of which got an excellent spatial analysis ability,studied on the feasibility of the extraction method of urban waterlogging area with the study area setting in Ningbo City,thus in order to provide scientific reference for the risk prevention and control of the urban waterlogging.%城市暴雨内涝灾害频发，严重威胁城市正常的生产生活活动。快速有效地确定城市易集水区的主要分布区域，能为城市暴雨内涝防灾减灾工作提供直观的决策参考依据，同时为后续风险灾害评估研究提供基础数据准备。研究基于精细化城市地表模型，考虑地形因素，结合具有优秀空间分析能力的GIS技术，以宁波市为研究区域，探讨城市易集水区普查的方法可行性，同时生成易集水区域的积水深度计算工具，以期为后续灾害风险评估提供主要的评判因素，为宁波市城市内涝治理及风险防控提供科学参考依据。
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