Localized revision and application of assessing indices for regional heavy rainfall events in Hubei Province

• Published in: 暴雨灾害 Vol. 39; no. 5; pp. 470 - 476
• Main Author: Guoping HONG
• Format: Journal Article
• Language: Chinese
• Published: Editorial Office of Torrential Rain and Disasters 01.10.2020
• Subjects: heavy rainfall assessing; heavy rainfall monitoring; localized revising; recurrence interval; regional heavy rainfall
• ISSN: 2097-2164
• DOI: 10.3969/j.issn.1004-9045.2020.05.005

Based on the operational provisions of important regional weather event monitoring and evaluation issued by CMA in 2019, in terms of the monitoring and evaluation method for regional heavy rainfall event within, also for being easy to compare the different regional heavy rainfall events, we have conducted a localized revision to the relative indices, and applied the corrected assessing indices to the assessment of regional heavy rainfall events in Hubei province. Firstly, using daily precipitation data at 81 national weather stations in Hubei from 1961 to 2018, the regional heavy rainfall day and the regional heavy rainfall event in Hubei were defined. Secondly, average heavy rainfall intensity, average covering area and duration of a regional heavy rainfall event were selected as the assessing factors by which the synthesizing assessing index is established for the regional heavy rainfall events in Hubei, and then the synthesizing intensity grades were divided by percentile method to simulate the intensity r