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  • 1. Chen, Xiaohong
    et al.
    Zhang, Lijuan
    Xu, Chong-Yu
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
    Zhang, Jiaming
    Ye, Changqing
    Hydrological Design of Nonstationary Flood Extremes and Durations in Wujiang River, South China: Changing Properties, Causes, and Impacts2013In: Mathematical problems in engineering (Print), ISSN 1024-123X, E-ISSN 1563-5147, p. 527461-Article in journal (Refereed)
    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.

  • 2.
    Chen, Zhiyong
    et al.
    Univ Newcastle, Sch Elect Engn & Comp Sci, Callaghan, NSW, Australia..
    Zhang, Haitao
    Huazhong Univ Sci & Technol, Dept Control Sci & Engn, Wuhan, Peoples R China..
    Zhu, Lijun
    Univ Hong Kong, Dept Elect & Elect Engn, Pokfulam, Hong Kong, Peoples R China..
    Knorn, Steffi
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Signals and Systems Group.
    Cheng, Zhao
    Dartmouth Coll, Thayer Sch Engn, Hanover, NH 03755 USA..
    Advanced Techniques for Networked Systems with Applications2017In: Mathematical problems in engineering (Print), ISSN 1024-123X, E-ISSN 1563-5147, article id 3849019Article in journal (Refereed)
  • 3.
    Yamalova, Diana
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Division of Systems and Control. Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Automatic control.
    Churilov, Alexander
    Medvedev, Alexander
    Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Division of Systems and Control. Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Automatic control.
    Finite-dimensional hybrid observer for delayed impulsive model of testosterone regulation2015In: Mathematical problems in engineering (Print), ISSN 1024-123X, E-ISSN 1563-5147, Vol. 2015, p. 190463:1-12, article id 190463Article in journal (Refereed)
1 - 3 of 3
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