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Spatial variation of catchment-oriented extreme rainfall in England and Wales
Atmospheric Research, Volume: 266, Start page: 105968
Swansea University Authors:
Huan Wang, Yunqing Xuan
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© 2021 The Authors. This is an open access article under the CC BY license
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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...
Published in: | Atmospheric Research |
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ISSN: | 0169-8095 |
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Elsevier BV
2022
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URI: | https://cronfa.swan.ac.uk/Record/cronfa59013 |
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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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facultyofscienceandengineering |
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Faculty of Science and Engineering |
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facultyofscienceandengineering |
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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 |
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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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1763754072767201280 |
score |
11.021648 |