uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
Hydrological Design of Nonstationary Flood Extremes and Durations in Wujiang River, South China: Changing Properties, Causes, and Impacts
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
Show others and affiliations
2013 (English)In: Mathematical problems in engineering (Print), ISSN 1024-123X, E-ISSN 1563-5147, 527461- p.Article in journal (Refereed) Published
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.

Place, publisher, year, edition, pages
2013. 527461- p.
National Category
Natural Sciences
URN: urn:nbn:se:uu:diva-204181DOI: 10.1155/2013/527461ISI: 000320515800001OAI: oai:DiVA.org:uu-204181DiVA: diva2:637875
Available from: 2013-07-23 Created: 2013-07-23 Last updated: 2013-07-23Bibliographically approved

Open Access in DiVA

fulltext(2817 kB)134 downloads
File information
File name FULLTEXT01.pdfFile size 2817 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Other links

Publisher's full text

Search in DiVA

By author/editor
Xu, Chong-Yu
By organisation
In the same journal
Mathematical problems in engineering (Print)
Natural Sciences

Search outside of DiVA

GoogleGoogle Scholar
Total: 134 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 226 hits
ReferencesLink to record
Permanent link

Direct link