Multivariable Flood Frequency Analysis of the Yujiang River Based on Annual Maximum Method and Peaks Over Threshold Method
In recent years, significant changes in hydrological and engineering conditions have been observed in the Yujiang River basin, and climate anomalies have increased flood control pressures. The distribution of rainstorms and floods within the basin varies significantly, which makes it insufficient to...
Saved in:
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | zho |
| Published: |
Editorial Office of Pearl River
2024-01-01
|
| Series: | Renmin Zhujiang |
| Subjects: | |
| Online Access: | http://www.renminzhujiang.cn/thesisDetails?columnId=77792078&Fpath=home&index=0 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1841530204251488256 |
|---|---|
| author | CHEN Quanfu LI Xungui |
| author_facet | CHEN Quanfu LI Xungui |
| author_sort | CHEN Quanfu |
| collection | DOAJ |
| description | In recent years, significant changes in hydrological and engineering conditions have been observed in the Yujiang River basin, and climate anomalies have increased flood control pressures. The distribution of rainstorms and floods within the basin varies significantly, which makes it insufficient to describe flood risk solely from the perspective of flood peak or flood volume, and further study is necessitated. This paper takes the runoff data (1947–2015) from the Guigang Station as the research object and extracts flood sequences through the annual maximum (AM) method and the peaks over threshold (POT) method. Three common Archimedean Copula functions are employed to establish the multivariate joint distribution of flood variables, and their joint return periods and co-occurrence return periods are compared and analyzed. Results show that the optimal marginal distributions respectively obtained through the AM method and the POT method differ, with Clayton Copula being the optimal fitting function for the AM method and Frank Copula for the POT method. While the joint and co-occurrence return periods calculated through both methods show little difference, under the same return period, the POT method yields more reliable results for flood peak and flood volume. The findings can provide a valuable reference for decision-making in aspects of flood mitigation, engineering construction, and management in the Yujiang River basin. |
| format | Article |
| id | doaj-art-481342b7eade4b68bc81b895e1e38db5 |
| institution | Kabale University |
| issn | 1001-9235 |
| language | zho |
| publishDate | 2024-01-01 |
| publisher | Editorial Office of Pearl River |
| record_format | Article |
| series | Renmin Zhujiang |
| spelling | doaj-art-481342b7eade4b68bc81b895e1e38db52025-01-15T03:08:28ZzhoEditorial Office of Pearl RiverRenmin Zhujiang1001-92352024-01-0111177792078Multivariable Flood Frequency Analysis of the Yujiang River Based on Annual Maximum Method and Peaks Over Threshold MethodCHEN QuanfuLI XunguiIn recent years, significant changes in hydrological and engineering conditions have been observed in the Yujiang River basin, and climate anomalies have increased flood control pressures. The distribution of rainstorms and floods within the basin varies significantly, which makes it insufficient to describe flood risk solely from the perspective of flood peak or flood volume, and further study is necessitated. This paper takes the runoff data (1947–2015) from the Guigang Station as the research object and extracts flood sequences through the annual maximum (AM) method and the peaks over threshold (POT) method. Three common Archimedean Copula functions are employed to establish the multivariate joint distribution of flood variables, and their joint return periods and co-occurrence return periods are compared and analyzed. Results show that the optimal marginal distributions respectively obtained through the AM method and the POT method differ, with Clayton Copula being the optimal fitting function for the AM method and Frank Copula for the POT method. While the joint and co-occurrence return periods calculated through both methods show little difference, under the same return period, the POT method yields more reliable results for flood peak and flood volume. The findings can provide a valuable reference for decision-making in aspects of flood mitigation, engineering construction, and management in the Yujiang River basin.http://www.renminzhujiang.cn/thesisDetails?columnId=77792078&Fpath=home&index=0multivariable flood frequency analysisannual maximum methodpeaks over threshold methodCopula functionsreturn periodYujiang River |
| spellingShingle | CHEN Quanfu LI Xungui Multivariable Flood Frequency Analysis of the Yujiang River Based on Annual Maximum Method and Peaks Over Threshold Method Renmin Zhujiang multivariable flood frequency analysis annual maximum method peaks over threshold method Copula functions return period Yujiang River |
| title | Multivariable Flood Frequency Analysis of the Yujiang River Based on Annual Maximum Method and Peaks Over Threshold Method |
| title_full | Multivariable Flood Frequency Analysis of the Yujiang River Based on Annual Maximum Method and Peaks Over Threshold Method |
| title_fullStr | Multivariable Flood Frequency Analysis of the Yujiang River Based on Annual Maximum Method and Peaks Over Threshold Method |
| title_full_unstemmed | Multivariable Flood Frequency Analysis of the Yujiang River Based on Annual Maximum Method and Peaks Over Threshold Method |
| title_short | Multivariable Flood Frequency Analysis of the Yujiang River Based on Annual Maximum Method and Peaks Over Threshold Method |
| title_sort | multivariable flood frequency analysis of the yujiang river based on annual maximum method and peaks over threshold method |
| topic | multivariable flood frequency analysis annual maximum method peaks over threshold method Copula functions return period Yujiang River |
| url | http://www.renminzhujiang.cn/thesisDetails?columnId=77792078&Fpath=home&index=0 |
| work_keys_str_mv | AT chenquanfu multivariablefloodfrequencyanalysisoftheyujiangriverbasedonannualmaximummethodandpeaksoverthresholdmethod AT lixungui multivariablefloodfrequencyanalysisoftheyujiangriverbasedonannualmaximummethodandpeaksoverthresholdmethod |