Influence of urbanization on hourly extreme precipitation over China

Huang，Xiaowen1; Wang，Dashan1; Ziegler，Alan D.2; Liu，Xiaoping3; Zeng，Hui4; Xu，Zhibo5; Zeng，Zhenzhong1

2022-04-01

10.1088/1748-9326/ac59a6

Environmental Research Letters   影响因子和分区

1748-9318

1748-9326

The impact of rapid urbanization on the spatiotemporal pattern of short-term extreme precipitation in China remains unclear at the subnational scale. In this study, we present a general framework that measures urbanization-induced variation in hourly extreme wet season precipitation (April-October) from 1985 to 2012, with reference to a dynamic urban-rural station classification based on annual changes in urban extent. We found that urbanization in south China (<29° N) brings more extreme precipitation to urban areas than to suburbs, and reduces extreme precipitation continually over urban areas in parts of the north and northeast. Over 60% of provincial capital cities show significant changes in extreme precipitation due to urbanization, including smaller size cities separated from large urban clusters. Urbanization enhances extreme precipitation mainly in the local main part of the rainy season, which refers to May in the south (e.g. urban-rural differences of 0.70 mm h-1 in Guangzhou) and July-September in the central and north (1.16 mm h-1 in August of Beijing). Urbanization also increases hourly extreme precipitation at peak times in diurnal cycles. The results indicate that urbanization has caused overall more and more heterogeneous spatial patterns over China and concentrated distributions during the rainy season and peak time. These patterns warrant attention when assessing the risk of increased waterlogging and flash flooding in urban areas.

dynamic classification hourly extreme precipitation spatiotemporal pattern urban-rural difference urbanization

SCI ; EI

英语

第一 ; 通讯

National Natural Science Foundation of China[42071022,42001321] ; China Postdoctoral Science Foundation[2021T140292] ; Southern University of Science and Technology[29/Y01296122] ; Highlight Project on Water Security and Global Change of the Southern University of Science and Technology[G02296302]

Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences

Environmental Sciences ; Meteorology & Atmospheric Sciences

WOS:000766857900001

IOP Publishing Ltd

20221211806183

Precipitation (meteorology) ; Rural areas

Precipitation:443.3 ; Accidents and Accident Prevention:914.1

2-s2.0-85126393728

Scopus

1.School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,China
2.Faculty of Fisheries Technology and Aquatic Resources,Maejo University,Chiang Mai,Thailand
3.Guangdong Key Laboratory for Urbanization and Geo-simulation,School of Geography and Planning,Sun Yat-Sen University,Guangzhou,China
4.Shenzhen Graduate School,Peking University,Shenzhen,China
5.Key Laboratory of Urban Land Resources Monitoring and Simulation,Ministry of Natural Resources,Shenzhen,China

Huang，Xiaowen,Wang，Dashan,Ziegler，Alan D.,et al. Influence of urbanization on hourly extreme precipitation over China[J]. Environmental Research Letters,2022,17(4).

Huang，Xiaowen.,Wang，Dashan.,Ziegler，Alan D..,Liu，Xiaoping.,Zeng，Hui.,...&Zeng，Zhenzhong.(2022).Influence of urbanization on hourly extreme precipitation over China.Environmental Research Letters,17(4).

Huang，Xiaowen,et al."Influence of urbanization on hourly extreme precipitation over China".Environmental Research Letters 17.4(2022).