Spatial and temporal variation of precipitation characteristics in the semiarid region of Xi'an, northwest China

Precipitation variations mostly affect the water resource planning in semi-arid regions of northwest China. The objective of this study is to quantitatively explore the spatial and temporal variations of precipitation in different time scales in Xi'an city area. The Mann–Kendall test and wavele...

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Autores principales:	Hao Han, Jingming Hou, Rengui Jiang, Jiahui Gong, Ganggang Bai, Yongde Kang, Wenchao Qi, Yuan Li, Bingyao Li
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	mann–kendall test periodicity analysis precipitation spatial and temporal variations wavelet analysis xi'an city Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/d0efa649bff841199dc49c9bd7512274
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spelling	oai:doaj.org-article:d0efa649bff841199dc49c9bd75122742021-11-05T19:07:58ZSpatial and temporal variation of precipitation characteristics in the semiarid region of Xi'an, northwest China2040-22442408-935410.2166/wcc.2021.048https://doaj.org/article/d0efa649bff841199dc49c9bd75122742021-09-01T00:00:00Zhttp://jwcc.iwaponline.com/content/12/6/2697https://doaj.org/toc/2040-2244https://doaj.org/toc/2408-9354Precipitation variations mostly affect the water resource planning in semi-arid regions of northwest China. The objective of this study is to quantitatively explore the spatial and temporal variations of precipitation in different time scales in Xi'an city area. The Mann–Kendall test and wavelet analysis methods were applied to analyze the precipitation variability. In terms of temporal variation of precipitation, the results indicated that the annual precipitation exhibited a significant decreasing trend during 1951–2018. Except for summer precipitation representing a slightly increasing trend, the other seasonal precipitations had a similar decreasing trend to annual precipitation throughout 1951–2018. The monthly precipitation had different change trends, showing the precipitation from June to September could account for 58.4% of the total annual precipitation. In addition, it was clear that annual precipitation had a significant periodic change, with the periods of 6, 13, 19, and 27 years. For the spatial variation of precipitation during 1961–2018, the results showed that annual and seasonal precipitation exhibited obvious spatial differences, indicating an increasing spatial trend from north to south. Thus, understanding the precipitation variation in Xi'an city can provide a theoretical foundation of future water resources management for other cities in semi-arid regions of northwest China. HIGHLIGHTS There were different variation trends in annual, seasonal and monthly precipitation at a temporal scale.; The annual precipitation in Xi'an city had a significantly increasing trend during 1951–2018.; The annual and seasonal precipitation exhibited obvious spatial differences during 1961–2018.; Findings could guide future water resource management and allocation of other cities in semiarid regions of northwest China.;Hao HanJingming HouRengui JiangJiahui GongGanggang BaiYongde KangWenchao QiYuan LiBingyao LiIWA Publishingarticlemann–kendall testperiodicity analysisprecipitationspatial and temporal variationswavelet analysisxi'an cityEnvironmental technology. Sanitary engineeringTD1-1066Environmental sciencesGE1-350ENJournal of Water and Climate Change, Vol 12, Iss 6, Pp 2697-2715 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	mann–kendall test periodicity analysis precipitation spatial and temporal variations wavelet analysis xi'an city Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350
spellingShingle	mann–kendall test periodicity analysis precipitation spatial and temporal variations wavelet analysis xi'an city Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Hao Han Jingming Hou Rengui Jiang Jiahui Gong Ganggang Bai Yongde Kang Wenchao Qi Yuan Li Bingyao Li Spatial and temporal variation of precipitation characteristics in the semiarid region of Xi'an, northwest China
description	Precipitation variations mostly affect the water resource planning in semi-arid regions of northwest China. The objective of this study is to quantitatively explore the spatial and temporal variations of precipitation in different time scales in Xi'an city area. The Mann–Kendall test and wavelet analysis methods were applied to analyze the precipitation variability. In terms of temporal variation of precipitation, the results indicated that the annual precipitation exhibited a significant decreasing trend during 1951–2018. Except for summer precipitation representing a slightly increasing trend, the other seasonal precipitations had a similar decreasing trend to annual precipitation throughout 1951–2018. The monthly precipitation had different change trends, showing the precipitation from June to September could account for 58.4% of the total annual precipitation. In addition, it was clear that annual precipitation had a significant periodic change, with the periods of 6, 13, 19, and 27 years. For the spatial variation of precipitation during 1961–2018, the results showed that annual and seasonal precipitation exhibited obvious spatial differences, indicating an increasing spatial trend from north to south. Thus, understanding the precipitation variation in Xi'an city can provide a theoretical foundation of future water resources management for other cities in semi-arid regions of northwest China. HIGHLIGHTS There were different variation trends in annual, seasonal and monthly precipitation at a temporal scale.; The annual precipitation in Xi'an city had a significantly increasing trend during 1951–2018.; The annual and seasonal precipitation exhibited obvious spatial differences during 1961–2018.; Findings could guide future water resource management and allocation of other cities in semiarid regions of northwest China.;
format	article
author	Hao Han Jingming Hou Rengui Jiang Jiahui Gong Ganggang Bai Yongde Kang Wenchao Qi Yuan Li Bingyao Li
author_facet	Hao Han Jingming Hou Rengui Jiang Jiahui Gong Ganggang Bai Yongde Kang Wenchao Qi Yuan Li Bingyao Li
author_sort	Hao Han
title	Spatial and temporal variation of precipitation characteristics in the semiarid region of Xi'an, northwest China
title_short	Spatial and temporal variation of precipitation characteristics in the semiarid region of Xi'an, northwest China
title_full	Spatial and temporal variation of precipitation characteristics in the semiarid region of Xi'an, northwest China
title_fullStr	Spatial and temporal variation of precipitation characteristics in the semiarid region of Xi'an, northwest China
title_full_unstemmed	Spatial and temporal variation of precipitation characteristics in the semiarid region of Xi'an, northwest China
title_sort	spatial and temporal variation of precipitation characteristics in the semiarid region of xi'an, northwest china
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/d0efa649bff841199dc49c9bd7512274
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Spatial and temporal variation of precipitation characteristics in the semiarid region of Xi'an, northwest China

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