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Can IMERG QPE product capture the heavy rain on urban flood scale?

文献类型：期刊论文

作者Xu, Jinyu; Qi, Youcun; Li, Donghuan; Zhao, Zhanfeng
刊名SCIENCE OF THE TOTAL ENVIRONMENT
出版日期2024-07-10
卷号933页码:173022
关键词Urban areas Small spatial scales Hourly precipitation Heavy precipitation centers Heavy precipitation centers
DOI10.1016/j.scitotenv.2024.173022
产权排序1
文献子类Article
英文摘要Urban areas are increasingly vulnerable to sudden flooding disasters caused by intense rainfall and high imperviousness degree, resulting in great economic losses and human casualties. Interactions between rainfall data and urban catchment characteristics highlight the urgent need of accurate and effective precipitation data to apply in reliable hydrological simulations. However, it remains a challenge to obtain accurate rainfall datasets on such small scales in urban areas. As satellite remote sensing is the only method that can achieve global observation, it is important to evaluate satellite precipitation products in their ability to accurately capture intense precipitation on urban flood scales. This study evaluates the performance of the latest version 06B (V06B) Integrated Multi-satellitE Retrievals for Global Precipitation Measurement (IMERG) in North China Plain, with using the Radar-Gauge merged precipitation estimates as reference data. First, it could be concluded that IMERG fails to accurately estimate precipitation in the whole study area, having the problem of overestimating light precipitation and underestimating heavy precipitation. Second, results show that IMERG has poor ability to capture heavy precipitation on small scales, with the percentage of Hit nearly 0 and the percentage of Miss higher than 40 % for all the precipitation cases. Third, with the expansion of heavy precipitation centers' coverage, the problem of IMERG not to detect heavy precipitation gets mitigated, with the percentage of Miss decreasing by 14 % (19 %). However, the ability to capture both spatial location and precipitation intensity is still not good, the percentage of Hit ranging from 0.05 % to 7 %, without obvious improvement. When IMERG is able to capture the center of strong precipitation, it also tends to overestimate the weak precipitation around the center of strong precipitation. Results of this study provide an improved understanding of how well the V06B IMERG products capture the heavy precipitation center at small scales in urban areas, which will be useful for both developers and users of IMERG.
WOS关键词SATELLITE PRECIPITATION PRODUCTS ; YANGTZE-RIVER BASIN ; GPM IMERG ; COMPREHENSIVE EVALUATION ; HYDROLOGIC APPLICATIONS ; ANALYSIS TMPA ; TRMM ; RESOLUTION ; UTILITY ; RADAR
WOS研究方向Environmental Sciences & Ecology
WOS记录号WOS:001299374200001
源URL[http://ir.igsnrr.ac.cn/handle/311030/207963]  
专题陆地水循环及地表过程院重点实验室_外文论文
通讯作者Qi, Youcun; Li, Donghuan
作者单位Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China; Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Xu, Jinyu,Qi, Youcun,Li, Donghuan,et al. Can IMERG QPE product capture the heavy rain on urban flood scale?[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2024,933:173022.
APA Xu, Jinyu,Qi, Youcun,Li, Donghuan,&Zhao, Zhanfeng.(2024).Can IMERG QPE product capture the heavy rain on urban flood scale?.SCIENCE OF THE TOTAL ENVIRONMENT,933,173022.
MLA Xu, Jinyu,et al."Can IMERG QPE product capture the heavy rain on urban flood scale?".SCIENCE OF THE TOTAL ENVIRONMENT 933(2024):173022.

入库方式： OAI收割

来源：地理科学与资源研究所

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