Spatiotemporal variation characteristics of extreme precipitation in the upper reaches of the Hongshui River Basin during 1959–2016

Understanding changes in the intensity and frequency of extreme precipitation is vital for flood control, disaster mitigation, and water resource management. In this study, 12 extreme precipitation indices and the best-fitting extreme value distribution were used to analyze the spatiotemporal charac...

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Autores principales:	Ya Huang, Ling Yi, Weihua Xiao, Guibing Hou, Yuyan Zhou
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	extreme distribution extreme precipitation hongshui river basin large-scale climate indices Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/015a4ede25f4494a954d9233f3dd2dce
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spelling	oai:doaj.org-article:015a4ede25f4494a954d9233f3dd2dce2021-11-05T19:07:29ZSpatiotemporal variation characteristics of extreme precipitation in the upper reaches of the Hongshui River Basin during 1959–20162040-22442408-935410.2166/wcc.2021.339https://doaj.org/article/015a4ede25f4494a954d9233f3dd2dce2021-09-01T00:00:00Zhttp://jwcc.iwaponline.com/content/12/6/2378https://doaj.org/toc/2040-2244https://doaj.org/toc/2408-9354Understanding changes in the intensity and frequency of extreme precipitation is vital for flood control, disaster mitigation, and water resource management. In this study, 12 extreme precipitation indices and the best-fitting extreme value distribution were used to analyze the spatiotemporal characteristics of extreme precipitation in the upper reaches of the Hongshui River Basin (UHRB). The possible links between extreme precipitation and large-scale circulation were also investigated. Most extreme precipitation indices increased from west to east in the UHRB, indicating that the eastern region is a humid area with abundant precipitation. The indices for consecutive wet days (CWD) and precipitation events (R0.1) decreased significantly, indicating that the UHRB tends to be dry, with few precipitation events. The probability distribution functions of most extreme precipitation indices, especially that of R0.1, shifted significantly to the left in 1988–2016 compared with 1959–1987, further indicating that the UHRB has experienced a significant drying trend in recent decades. The East Asian summer monsoon and the El Niño–Southern Oscillation/Pacific Decadal Oscillation were confirmed to influence extreme precipitation in the UHRB. These findings are helpful for understanding extreme precipitation variation trends in the UHRB and provide references for further research. HIGHLIGHTS We do not focus on the Pearl River Basin (453,690 km2) but pay attention to a sub-basin (98,500 km2) within it.; Most extreme precipitation indices decreased slightly and nonsignificantly in the UHRB.; The number of consecutive wet days and precipitation events decreased significantly.; The UHRB has tended to be dry, with few precipitation events.; The El Niño–Southern Oscillation /Pacific Decadal Oscillation and East Asian summer monsoon have strong effects on extreme precipitation.;Ya HuangLing YiWeihua XiaoGuibing HouYuyan ZhouIWA Publishingarticleextreme distributionextreme precipitationhongshui river basinlarge-scale climate indicesEnvironmental technology. Sanitary engineeringTD1-1066Environmental sciencesGE1-350ENJournal of Water and Climate Change, Vol 12, Iss 6, Pp 2378-2399 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	extreme distribution extreme precipitation hongshui river basin large-scale climate indices Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350
spellingShingle	extreme distribution extreme precipitation hongshui river basin large-scale climate indices Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Ya Huang Ling Yi Weihua Xiao Guibing Hou Yuyan Zhou Spatiotemporal variation characteristics of extreme precipitation in the upper reaches of the Hongshui River Basin during 1959–2016
description	Understanding changes in the intensity and frequency of extreme precipitation is vital for flood control, disaster mitigation, and water resource management. In this study, 12 extreme precipitation indices and the best-fitting extreme value distribution were used to analyze the spatiotemporal characteristics of extreme precipitation in the upper reaches of the Hongshui River Basin (UHRB). The possible links between extreme precipitation and large-scale circulation were also investigated. Most extreme precipitation indices increased from west to east in the UHRB, indicating that the eastern region is a humid area with abundant precipitation. The indices for consecutive wet days (CWD) and precipitation events (R0.1) decreased significantly, indicating that the UHRB tends to be dry, with few precipitation events. The probability distribution functions of most extreme precipitation indices, especially that of R0.1, shifted significantly to the left in 1988–2016 compared with 1959–1987, further indicating that the UHRB has experienced a significant drying trend in recent decades. The East Asian summer monsoon and the El Niño–Southern Oscillation/Pacific Decadal Oscillation were confirmed to influence extreme precipitation in the UHRB. These findings are helpful for understanding extreme precipitation variation trends in the UHRB and provide references for further research. HIGHLIGHTS We do not focus on the Pearl River Basin (453,690 km2) but pay attention to a sub-basin (98,500 km2) within it.; Most extreme precipitation indices decreased slightly and nonsignificantly in the UHRB.; The number of consecutive wet days and precipitation events decreased significantly.; The UHRB has tended to be dry, with few precipitation events.; The El Niño–Southern Oscillation /Pacific Decadal Oscillation and East Asian summer monsoon have strong effects on extreme precipitation.;
format	article
author	Ya Huang Ling Yi Weihua Xiao Guibing Hou Yuyan Zhou
author_facet	Ya Huang Ling Yi Weihua Xiao Guibing Hou Yuyan Zhou
author_sort	Ya Huang
title	Spatiotemporal variation characteristics of extreme precipitation in the upper reaches of the Hongshui River Basin during 1959–2016
title_short	Spatiotemporal variation characteristics of extreme precipitation in the upper reaches of the Hongshui River Basin during 1959–2016
title_full	Spatiotemporal variation characteristics of extreme precipitation in the upper reaches of the Hongshui River Basin during 1959–2016
title_fullStr	Spatiotemporal variation characteristics of extreme precipitation in the upper reaches of the Hongshui River Basin during 1959–2016
title_full_unstemmed	Spatiotemporal variation characteristics of extreme precipitation in the upper reaches of the Hongshui River Basin during 1959–2016
title_sort	spatiotemporal variation characteristics of extreme precipitation in the upper reaches of the hongshui river basin during 1959–2016
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/015a4ede25f4494a954d9233f3dd2dce
work_keys_str_mv	AT yahuang spatiotemporalvariationcharacteristicsofextremeprecipitationintheupperreachesofthehongshuiriverbasinduring19592016 AT lingyi spatiotemporalvariationcharacteristicsofextremeprecipitationintheupperreachesofthehongshuiriverbasinduring19592016 AT weihuaxiao spatiotemporalvariationcharacteristicsofextremeprecipitationintheupperreachesofthehongshuiriverbasinduring19592016 AT guibinghou spatiotemporalvariationcharacteristicsofextremeprecipitationintheupperreachesofthehongshuiriverbasinduring19592016 AT yuyanzhou spatiotemporalvariationcharacteristicsofextremeprecipitationintheupperreachesofthehongshuiriverbasinduring19592016
_version_	1718444018136776704

Spatiotemporal variation characteristics of extreme precipitation in the upper reaches of the Hongshui River Basin during 1959–2016

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