水利水电技术（中英文）2024，Vol.55Issue(6)：106-119,14.DOI:10.13928/j.cnki.wrahe.2024.06.009
基于多距离融合的场次降雨时空相似性比较
Spatio-temporal similarity comparison of rainfall events based on multi-distance fusion
摘要
Abstract
[Objective]Rainfall similarity analysis is a method used to compare and evaluate the similarity between different rain-fall events,which can be used for rainfall-runoff process prediction.Focusing on the spatio-temporal distribution characteristics of rainfall,this paper takes the central urban area of Beijing from 2008 to 2021 as the data sample,and proposes a multi-distance fusion-based rainfall event spatio-temporal similarity comparison method.[Methods]First,rainfall events were divided by setting a rainfall percentage threshold,dividing 225 rainfall events in the flood season(June-September).Then,feature elements such as rainfall,rainfall duration,rainfall intensity,and rainfall center range were extracted,and rainfall feature distances were calcu-lated in three aspects:rainfall element distance,rainfall center distance,and total rainfall distance.At the same time,in order to better integrate the feature distances,the principal component analysis method was used to calculate the weights for distance fusion,and the final distance was obtained,and similarity ranking was performed according to the calculation result.[Results]By comparing rainfall events No.33 and No.120,it can be seen from the rainfall distribution map,rainfall center range map and intuitive comparison of rainfall feature elements that they have a high degree of similarity.The calculated comprehensive sim-ilarity is 78.46%.[Conclusion]The result show that:this method comprehensively considers the differences in intensity,spatial range,total rainfall amount and other aspects of rainfall,and can provide accurate and reliable rainfall event similarity analysis result,and provide useful tools for urban flood warning and disaster prevention.关键词
多距离融合/场次降雨/降雨特征/相似性分析/主成分分析Key words
multi-distance fusion/rainfall events/rainfall characteristics/similarity analysis/principal component analysis分类
建筑与水利引用本文复制引用
李虎,王丽晶,杨思敏,赵飞,王加虎..基于多距离融合的场次降雨时空相似性比较[J].水利水电技术（中英文）,2024,55(6):106-119,14.基金项目
北京市科技计划项目"暴雨洪涝灾害智能感知及多源数据驱动风险预警技术研究与应用"(Z231100003823005) （Z231100003823005）
北京市科技计划课题"北京城市洪涝淹水实时预测预警关键技术研究与示范"(Z201100008220005) （Z201100008220005）
