广东水利水电Issue(10)：63-69,7.
粤港澳地区1961-2020年极端降水事件的空间特征
The Spatial Characteristics of Extreme Precipitation Events on Guangdong,Hong Kong and Macao from 1961 to 2020
摘要
Abstract
Studying the spatial evolution patterns of extreme precipitation events in the Guangdong-Hong Kong-Macao Greater Bay Area is of great significance for flood control and disaster reduction,as well as responding to drought events in changing environments.This article uses Mann Kendall test,Theil Sen's slope estimation,and correlation analysis to analyze the spatial changes of annual average precipitation,different levels of precipitation,and extreme precipitation index in the study area based on the daily precipitation of 38 meteorological stations in the Guangdong,Hong Kong and Macao region over the past 60 years.It reveals the characteristics of precipitation in the Guangdong Hong Kong Macao region and the spatial evolution of extreme precipitation events.The research results show that the average annual precipitation in the coastal areas of Guangdong,Hong Kong,and Macao is relatively high,with 26 stations showing an increasing trend in annual precipitation.However,the average annual precipitation at the Macao station shows a decreasing trend,with a change rate of-24.1 mm/10a.The proportion of light rain and moderate rain in mountainous areas of Guangdong,Hong Kong and Macao is relatively large,while that of heavy rain and rainstorm in plain areas is relatively large.The proportion of rainstorm at the Hong Kong Observatory is the largest,reaching 2.45%.The CDD index of 15 stations in Guangdong,Hong Kong and Macao shows a significant increase trend,indicating that the drought situations may gradually increase in the past 60 years,and the trend of extreme heavy precipitation in the estuary area of the the Pearl River Delta and the coastal area of eastern Guangdong has decreased.CDD is significantly positively correlated with Rx1day,Rx5day,R95pTOT,and R99pTOT,while negatively correlated with PRCPTOT.The increase in sustained drought days in the Guangdong Hong Kong Macao region not only leads to a decrease in total annual precipitation,but also is related to an increase in extreme precipitation.关键词
气候变化/极端降水指数/空间变化/粤港澳Key words
climate change/Extreme precipitation index/spatial changes/Guangdong-Hong Kong-Macao分类
天文与地球科学引用本文复制引用
欧阳建,刘洁,张力澜,彭海波,丁星臣..粤港澳地区1961-2020年极端降水事件的空间特征[J].广东水利水电,2024,(10):63-69,7.基金项目
广东省重点领域研发计划项目(编号:2020B0101130018) （编号:2020B0101130018）
广东省水利科技创新项目(编号:2022-02). （编号:2022-02）
