Hydrological Design of Nonstationary Flood Extremes and Durations in Wujiang River, South China: Changing Properties, Causes, and Impacts
Joint Authors
Chen, Xiaohong
Zhang, Lijuan
Xu, C.-Y.
Zhang, Jiaming
Ye, Changqing
Source
Mathematical Problems in Engineering
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-06-02
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
The flood-duration-frequency (QDF) analysis is performed using annual maximum streamflow series of 1–10 day durations observed at Pingshi and Lishi stations in southern China.
The trends and change point of annual maximum flood flow and flood duration are also investigated by statistical tests.
The results indicate that (1) the annual maximum flood flow only has a marginally increasing trend, whereas the flood duration exhibits a significant decreasing trend at the 0.10 significant level.
The change point for the annual maximum flood flow series was found in 1991 and after which the mean maximum flood flow increased by 45.26%.
(2) The period after 1991 is characterized by frequent and shorter duration floods due to increased rainstorm.
However, land use change in the basin was found intensifying the increased tendency of annual maximum flow after 1991.
And (3) under nonstationary environmental conditions, alternative definitions of return period should be adapted.
The impacts on curve fitting of flood series showed an overall change of upper tail from “gentle” to “steep,” and the design flood magnitude became larger.
Therefore, a nonstationary frequency analysis taking account of change point in the data series is highly recommended for future studies.
American Psychological Association (APA)
Chen, Xiaohong& Zhang, Lijuan& Xu, C.-Y.& Zhang, Jiaming& Ye, Changqing. 2013. Hydrological Design of Nonstationary Flood Extremes and Durations in Wujiang River, South China: Changing Properties, Causes, and Impacts. Mathematical Problems in Engineering،Vol. 2013, no. 2013, pp.1-10.
https://search.emarefa.net/detail/BIM-1009720
Modern Language Association (MLA)
Chen, Xiaohong…[et al.]. Hydrological Design of Nonstationary Flood Extremes and Durations in Wujiang River, South China: Changing Properties, Causes, and Impacts. Mathematical Problems in Engineering No. 2013 (2013), pp.1-10.
https://search.emarefa.net/detail/BIM-1009720
American Medical Association (AMA)
Chen, Xiaohong& Zhang, Lijuan& Xu, C.-Y.& Zhang, Jiaming& Ye, Changqing. Hydrological Design of Nonstationary Flood Extremes and Durations in Wujiang River, South China: Changing Properties, Causes, and Impacts. Mathematical Problems in Engineering. 2013. Vol. 2013, no. 2013, pp.1-10.
https://search.emarefa.net/detail/BIM-1009720
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1009720