Effects of Urbanization on Changes in Precipitation Extremes in Guangdong-Hong Kong-Macao Greater Bay Area, China

被引：7

作者：

Yang, Fang ^{[1
,2
]}

Wang, Xinghan ^{[1
,3
,4
]}

Zhou, Xiaoxue ^{[1
,4
]}

Wang, Qiang ^{[1
,3
]}

Tan, Xuezhi ^{[5
,6
]}

机构：

[1] Pearl River Water Resources Commiss, Pearl River Water Resources Res Inst, Guangzhou 510610, Peoples R China

[2] Tsinghua Univ, State Key Lab Hydrosci & Engn, Beijing 100084, Peoples R China

[3] Minist Water Resources, Key Lab Pearl River Estuary Regulat & Protect, Guangzhou 510610, Peoples R China

[4] Minist Water Resources, Key Lab Water Secur Guarantee Guangdong Hong Kong, Guangzhou 510610, Peoples R China

[5] Sun Yat Sen Univ, Ctr Water Resources & Environm, Sch Civil Engn, Guangzhou 510275, Peoples R China

[6] Southern Marine Sci & Engn Guangdong Lab Zhuhai, Zhuhai 519082, Peoples R China

来源：

WATER | 2023年 / 15卷 / 19期

基金：

国家重点研发计划;

关键词：

urbanization; precipitation extremes; (Guangdong-Hong Kong-Macao Greater Bay Area) GBA; climate change; statistical analyses; URBAN CANOPY MODEL; RIVER DELTA; HEAT-ISLAND; LAND-USE; CLIMATE; IMPACT; YANGTZE; EVENTS; FREQUENCY; EXPANSION;

D O I：

10.3390/w15193438

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Complex interaction between urbanization and climate change has been showing significant impacts on natural and human ecosystems. Increasing urban flooding and waterlogging are associated with urbanization. The Guangdong-Hong Kong-Macao Greater Bay Area (GBA) experiences a rapid and extensive urbanization, leading to intensified land use and cover changes. Concurrently, the frequent occurrence of extreme precipitation events pose great challenges of urban flood control and water resource management to GBA. This research statistically analyzes the spatiotemporal evolution characteristics of precipitation extremes from 1979-2018 which relates to the urbanization in GBA using various statistical methods including the Mann-Kendall test, bivariate Moran's test, and Spearman correlation analyses. The findings indicate that the impervious surface area in GBA exhibited a nonlinear growth trend from 1985-2018, particularly concentrated in the five major cities, i.e., Guangzhou, Foshan, Dongguan, Shenzhen, and Zhongshan. GBA urbanization can be categorized into three stages including Stage I (pre-1990, no urbanization), Stage II (1991-2009, rapid urbanization), and Stage III (2010-2018, slow urbanization). Compared to cities with low urbanization, the highly urbanized areas of GBA, including Guangzhou, Foshan, Zhongshan, and Dongguan, show statistically significant increases in precipitation extremes. The increasing trends of seven extreme precipitation indices show significant positive, spatiotemporal correlations with the change rate of urbanization in GBA. Moreover, the influence of urbanization on precipitation extremes in highly urbanized regions of the GBA is progressively strengthened along with urban development. During the stage of slow urbanization, urbanization contributes to 56.13% of increase in annual precipitation totals in GBA, and its contribution to increases in precipitation extremes ranges from 20-80%.

引用

页数：22