Spatial variation of catchment-oriented extreme rainfall in England and Wales

Wang, Huan; Xuan, Yunqing

doi:10.1016/j.atmosres.2021.105968

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Spatial variation of catchment-oriented extreme rainfall in England and Wales

Huan Wang, Yunqing Xuan

Atmospheric Research, Volume: 266, Start page: 105968

Swansea University Authors: Huan Wang, Yunqing Xuan

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DOI (Published version): 10.1016/j.atmosres.2021.105968

Abstract

This paper presents the spatial variation of the annual maximum daily rainfall (AMDR) in more than 900 catchments of England and Wales over the last century with respect to different spatial features including geographic location, elevation, size, orientation and shape of catchments. A SPER toolbox...

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Published in:	Atmospheric Research
ISSN:	0169-8095
Published:	Elsevier BV 2022
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URI:	https://cronfa.swan.ac.uk/Record/cronfa59013
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first_indexed	2021-12-15T15:32:05Z
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spelling	2022-10-31T18:32:49.7050527 v2 59013 2021-12-15 Spatial variation of catchment-oriented extreme rainfall in England and Wales 5f9cc01dc029e1a521b848fa12c4ef31 Huan Wang Huan Wang true false 3ece84458da360ff84fa95aa1c0c912b 0000-0003-2736-8625 Yunqing Xuan Yunqing Xuan true false 2021-12-15 This paper presents the spatial variation of the annual maximum daily rainfall (AMDR) in more than 900 catchments of England and Wales over the last century with respect to different spatial features including geographic location, elevation, size, orientation and shape of catchments. A SPER toolbox is employed to extract the spatial features of catchments where the AMDR is modelled by a well-tested Generalized Extreme Value (GEV) distribution. The results show that the GEV parameters μ and σ exhibit similar patterns and are usually larger with higher elevations. Increasing catchment size can decrease parameters due to areal averaging, however, in the middle-sized transition regions of the rainfall variation, e.g., east Wales, the trend reverses. For areas at high elevation, parameters are greater in the west-northwest-oriented catchments while parameters in west-northwest or east-northeast-oriented catchments at lower elevation are similar or smaller than those with a north-south orientation. An elongated shape catchment usually has smaller parameters than a rounded shape one. These findings reveal the heterogeneity of extreme rainfall distribution in space with respect to different spatial characteristics of catchments even under the same climate, which lays a basis for further catchment-based analysis concerning the relationship between hydrological response and geomorphic properties. Journal Article Atmospheric Research 266 105968 Elsevier BV 0169-8095 Spatial variation; Century-long variation; Catchment-orientated annual maximum daily rainfall; GEV 1 3 2022 2022-03-01 10.1016/j.atmosres.2021.105968 COLLEGE NANME COLLEGE CODE Swansea University External research funder(s) paid the OA fee (includes OA grants disbursed by the Library) The Academy of Medical Sciences CGRFNR4_1165 2022-10-31T18:32:49.7050527 2021-12-15T15:14:55.7781526 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Civil Engineering Huan Wang 1 Yunqing Xuan 0000-0003-2736-8625 2 59013__21921__7284cfb50ab6411fb9e14a014ca66e19.pdf 59013.pdf 2021-12-20T16:10:03.3669199 Output 12175014 application/pdf Version of Record true © 2021 The Authors. This is an open access article under the CC BY license true eng http://creativecommons.org/licenses/by/4.0/
title	Spatial variation of catchment-oriented extreme rainfall in England and Wales
spellingShingle	Spatial variation of catchment-oriented extreme rainfall in England and Wales Huan Wang Yunqing Xuan
title_short	Spatial variation of catchment-oriented extreme rainfall in England and Wales
title_full	Spatial variation of catchment-oriented extreme rainfall in England and Wales
title_fullStr	Spatial variation of catchment-oriented extreme rainfall in England and Wales
title_full_unstemmed	Spatial variation of catchment-oriented extreme rainfall in England and Wales
title_sort	Spatial variation of catchment-oriented extreme rainfall in England and Wales
author_id_str_mv	5f9cc01dc029e1a521b848fa12c4ef31 3ece84458da360ff84fa95aa1c0c912b
author_id_fullname_str_mv	5f9cc01dc029e1a521b848fa12c4ef31_*_Huan Wang 3ece84458da360ff84fa95aa1c0c912b_*_Yunqing Xuan
author	Huan Wang Yunqing Xuan
author2	Huan Wang Yunqing Xuan
format	Journal article
container_title	Atmospheric Research
container_volume	266
container_start_page	105968
publishDate	2022
institution	Swansea University
issn	0169-8095
doi_str_mv	10.1016/j.atmosres.2021.105968
publisher	Elsevier BV
college_str	Faculty of Science and Engineering
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hierarchy_top_id	facultyofscienceandengineering
hierarchy_top_title	Faculty of Science and Engineering
hierarchy_parent_id	facultyofscienceandengineering
hierarchy_parent_title	Faculty of Science and Engineering
department_str	School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Civil Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Civil Engineering
document_store_str	1
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description	This paper presents the spatial variation of the annual maximum daily rainfall (AMDR) in more than 900 catchments of England and Wales over the last century with respect to different spatial features including geographic location, elevation, size, orientation and shape of catchments. A SPER toolbox is employed to extract the spatial features of catchments where the AMDR is modelled by a well-tested Generalized Extreme Value (GEV) distribution. The results show that the GEV parameters μ and σ exhibit similar patterns and are usually larger with higher elevations. Increasing catchment size can decrease parameters due to areal averaging, however, in the middle-sized transition regions of the rainfall variation, e.g., east Wales, the trend reverses. For areas at high elevation, parameters are greater in the west-northwest-oriented catchments while parameters in west-northwest or east-northeast-oriented catchments at lower elevation are similar or smaller than those with a north-south orientation. An elongated shape catchment usually has smaller parameters than a rounded shape one. These findings reveal the heterogeneity of extreme rainfall distribution in space with respect to different spatial characteristics of catchments even under the same climate, which lays a basis for further catchment-based analysis concerning the relationship between hydrological response and geomorphic properties.
published_date	2022-03-01T04:15:59Z
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score	11.037166

Spatial variation of catchment-oriented extreme rainfall in England and Wales

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