GSTDTAP  > 资源环境科学
DOI10.1002/2017WR021623
Use of Flood Seasonality in Pooling-Group Formation and Quantile Estimation: An Application in Great Britain
Formetta, Giuseppe; Bell, Victoria; Stewart, Elizabeth
2018-02-01
发表期刊WATER RESOURCES RESEARCH
ISSN0043-1397
EISSN1944-7973
出版年2018
卷号54期号:2页码:1127-1145
文章类型Article
语种英语
国家England
英文摘要

Regional flood frequency analysis is one of the most commonly applied methods for estimating extreme flood events at ungauged sites or locations with short measurement records. It is based on: (i) the definition of a homogeneous group (pooling-group) of catchments, and on (ii) the use of the pooling-group data to estimate flood quantiles. Although many methods to define a pooling-group (pooling schemes, PS) are based on catchment physiographic similarity measures, in the last decade methods based on flood seasonality similarity have been contemplated. In this paper, two seasonality-based PS are proposed and tested both in terms of the homogeneity of the pooling-groups they generate and in terms of the accuracy in estimating extreme flood events. The method has been applied in 420 catchments in Great Britain (considered as both gauged and ungauged) and compared against the current Flood Estimation Handbook (FEH) PS. Results for gauged sites show that, compared to the current PS, the seasonality-based PS performs better both in terms of homogeneity of the pooling-group and in terms of the accuracy of flood quantile estimates. For ungauged locations, a national-scale hydrological model has been used for the first time to quantify flood seasonality. Results show that in 75% of the tested locations the seasonality-based PS provides an improvement in the accuracy of the flood quantile estimates. The remaining 25% were located in highly urbanized, groundwater-dependent catchments. The promising results support the aspiration that large-scale hydrological models complement traditional methods for estimating design floods.


英文关键词flood seasonality flood frequency analysis regionalization hydrological modeling
领域资源环境
收录类别SCI-E
WOS记录号WOS:000428474500026
WOS关键词FREQUENCY-ANALYSIS ; CLUSTER-ANALYSIS ; RAINFALL ; REGION ; MODEL ; REGIONALIZATION ; CLASSIFICATION ; SYSTEM ; UK
WOS类目Environmental Sciences ; Limnology ; Water Resources
WOS研究方向Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/21293
专题资源环境科学
作者单位Ctr Ecol & Hydrol, Maclean Bldg, Wallingford, Oxon, England
推荐引用方式
GB/T 7714
Formetta, Giuseppe,Bell, Victoria,Stewart, Elizabeth. Use of Flood Seasonality in Pooling-Group Formation and Quantile Estimation: An Application in Great Britain[J]. WATER RESOURCES RESEARCH,2018,54(2):1127-1145.
APA Formetta, Giuseppe,Bell, Victoria,&Stewart, Elizabeth.(2018).Use of Flood Seasonality in Pooling-Group Formation and Quantile Estimation: An Application in Great Britain.WATER RESOURCES RESEARCH,54(2),1127-1145.
MLA Formetta, Giuseppe,et al."Use of Flood Seasonality in Pooling-Group Formation and Quantile Estimation: An Application in Great Britain".WATER RESOURCES RESEARCH 54.2(2018):1127-1145.
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