American Journal of Water Science and Engineering

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Hydrological Risk Assessment of Gibe III Dam by Using L-Moment

Received: 22 January 2019    Accepted: 07 March 2019    Published: 08 April 2019
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Abstract

A hydrological analysis for assessing the risk of dam overtopping is required for both dam designing and dam safety checking. There is enormous amount of water to be stored in the reservoir to provide valuable service such as hydroelectric power generation and flood control. However dams can cause catastrophic damage to both life and property if they experience performance failures due to overtopping and inadequate spillway design. The hydrological risk was computed from historical peak flow data of Gilgel Gibe near Abelti, Gojeb near Shebe and Wabi near Wolkite, of major rivers flowing towards Gibe III Dam, respectively. From the flood statistics of rivers, the general extreme value (GEV) distribution was fitted to peak flow using L-moment. In this research made an attempt, the extreme event or probability of maximum discharge occurrence at dam site analyzed by associating peak occurrence with the service life of Dam and estimated the hydrological risk at Gibe III Dam. It finds PWM method is very suitable for three river flow condition flowing toward Gibe III Dam. The hydrological risk at Gibe III predicted for 50, 100 and 150 years with respect of Discharge range of 2730m3/s to 3180m3/s was observed there is a risk decreases as return period increases.

DOI 10.11648/j.ajwse.20190501.14
Published in American Journal of Water Science and Engineering (Volume 5, Issue 1, March 2019)
Page(s) 22-28
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2024. Published by Science Publishing Group

Keywords

L-moment, Gibe III Dam, Hydrological Risk Assessment, General Extreme Value

References
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Author Information
  • Water Supply and Environmental Engineering, Arba Minch Water Technology Institute, Arba Minch University, Arba Minch, Ethiopia

  • Arba Minch Water Technology Institute, Arba Minch University, Arba Minch, Ethiopia

  • Water Supply and Environmental Engineering, Arba Minch Water Technology Institute, Arba Minch University, Arba Minch, Ethiopia

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  • APA Style

    Sintayehu Yadete Tola, Abdella Kemal, Daniel Reddythota. (2019). Hydrological Risk Assessment of Gibe III Dam by Using L-Moment. American Journal of Water Science and Engineering, 5(1), 22-28. https://doi.org/10.11648/j.ajwse.20190501.14

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    ACS Style

    Sintayehu Yadete Tola; Abdella Kemal; Daniel Reddythota. Hydrological Risk Assessment of Gibe III Dam by Using L-Moment. Am. J. Water Sci. Eng. 2019, 5(1), 22-28. doi: 10.11648/j.ajwse.20190501.14

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    AMA Style

    Sintayehu Yadete Tola, Abdella Kemal, Daniel Reddythota. Hydrological Risk Assessment of Gibe III Dam by Using L-Moment. Am J Water Sci Eng. 2019;5(1):22-28. doi: 10.11648/j.ajwse.20190501.14

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  • @article{10.11648/j.ajwse.20190501.14,
      author = {Sintayehu Yadete Tola and Abdella Kemal and Daniel Reddythota},
      title = {Hydrological Risk Assessment of Gibe III Dam by Using L-Moment},
      journal = {American Journal of Water Science and Engineering},
      volume = {5},
      number = {1},
      pages = {22-28},
      doi = {10.11648/j.ajwse.20190501.14},
      url = {https://doi.org/10.11648/j.ajwse.20190501.14},
      eprint = {https://download.sciencepg.com/pdf/10.11648.j.ajwse.20190501.14},
      abstract = {A hydrological analysis for assessing the risk of dam overtopping is required for both dam designing and dam safety checking. There is enormous amount of water to be stored in the reservoir to provide valuable service such as hydroelectric power generation and flood control. However dams can cause catastrophic damage to both life and property if they experience performance failures due to overtopping and inadequate spillway design. The hydrological risk was computed from historical peak flow data of Gilgel Gibe near Abelti, Gojeb near Shebe and Wabi near Wolkite, of major rivers flowing towards Gibe III Dam, respectively. From the flood statistics of rivers, the general extreme value (GEV) distribution was fitted to peak flow using L-moment. In this research made an attempt, the extreme event or probability of maximum discharge occurrence at dam site analyzed by associating peak occurrence with the service life of Dam and estimated the hydrological risk at Gibe III Dam. It finds PWM method is very suitable for three river flow condition flowing toward Gibe III Dam. The hydrological risk at Gibe III predicted for 50, 100 and 150 years with respect of Discharge range of 2730m3/s to 3180m3/s was observed there is a risk decreases as return period increases.},
     year = {2019}
    }
    

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  • TY  - JOUR
    T1  - Hydrological Risk Assessment of Gibe III Dam by Using L-Moment
    AU  - Sintayehu Yadete Tola
    AU  - Abdella Kemal
    AU  - Daniel Reddythota
    Y1  - 2019/04/08
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    DO  - 10.11648/j.ajwse.20190501.14
    T2  - American Journal of Water Science and Engineering
    JF  - American Journal of Water Science and Engineering
    JO  - American Journal of Water Science and Engineering
    SP  - 22
    EP  - 28
    PB  - Science Publishing Group
    SN  - 2575-1875
    UR  - https://doi.org/10.11648/j.ajwse.20190501.14
    AB  - A hydrological analysis for assessing the risk of dam overtopping is required for both dam designing and dam safety checking. There is enormous amount of water to be stored in the reservoir to provide valuable service such as hydroelectric power generation and flood control. However dams can cause catastrophic damage to both life and property if they experience performance failures due to overtopping and inadequate spillway design. The hydrological risk was computed from historical peak flow data of Gilgel Gibe near Abelti, Gojeb near Shebe and Wabi near Wolkite, of major rivers flowing towards Gibe III Dam, respectively. From the flood statistics of rivers, the general extreme value (GEV) distribution was fitted to peak flow using L-moment. In this research made an attempt, the extreme event or probability of maximum discharge occurrence at dam site analyzed by associating peak occurrence with the service life of Dam and estimated the hydrological risk at Gibe III Dam. It finds PWM method is very suitable for three river flow condition flowing toward Gibe III Dam. The hydrological risk at Gibe III predicted for 50, 100 and 150 years with respect of Discharge range of 2730m3/s to 3180m3/s was observed there is a risk decreases as return period increases.
    VL  - 5
    IS  - 1
    ER  - 

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