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Nashe Dam Fail and Risk Analysis

Received: 19 December 2018     Accepted: 25 January 2019     Published: 14 March 2019
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Abstract

Nashe earth fill dam was constructed for the aim multi-purpose use (hydroelectric power and irrigation). While the construction of this dam many peoples around Dam were immigrated from their residential to another places including to the town. This research focused on the dam fail analysis by considering overtopping and piping failure mode. The input data were collected from Min. of Water and Energy, Federal Democratic Republic of Ethiopia (FDRE). The dam breach parameters were determined by applying the principle with Von Thun and Gillette. In dam break analysis the first step is model setup by using three dimensions (x, y and Z) of the downstream. By applying overtopping model, the peak discharge 8761.23m3/sec was obtained, which was more than 7.33 times the probable maximum flood and by applying piping mode, the peak discharge was obtained is 8620.85 m3/sec which was more than 7.21 times the probable maximum food at the nearby location of the dam. This indicates that, the peak outflow development during raining season was greater than inflow discharge flood (IDF) used as upper boundary condition for breach parameters. So it was summarized that high peak outflow and risk were developed to downstream by overtopping mode as compare by piping mode during occurrence of dam breach. As from the sensitivity analysis it was concluded, the effect of breach time on discharge is more sounded than the water level increase. This Dam Break modeling results obtained by studies could be used as flood mappings to assist the societies/communities for future planning developments in the flood prone areas/zones in advance.

Published in Engineering Science (Volume 4, Issue 1)
DOI 10.11648/j.es.20190401.12
Page(s) 12-27
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), 2019. Published by Science Publishing Group

Keywords

Dam Fail, Analysis, HEC-RAS, Hydrograph, HEC-Geo RAS, Sensitivity Analysis

References
[1] Abdulrahman, D. Z. (2014). Case Study of the Chaq-Chaq Dam Failure: Parameter Estimation and Evaluation of Dam Breach Prediction Models. Journal of Engineering Research and Applications, 109-116.
[2] C. H., & M. L. (2010). Application of the inflow design flood Analysis alternative to NRCS TR-60 design stormcriteria for High Hazard Dams. Natural Resources Conservation Service (pp. 1-11). Washington, D. C.: Natural Resources Conservation Service.
[3] Colorado Dam safety branch. (2010, February 10). Guidelines for Dam Breach Analysis. Colorado: Colorado Division of Water Resources.
[4] D. H., & D. T. (August, 2007). Final Report on Coordination and Cooperation with the European Union on Embankment Failure Analysis. Washington, DC: FEMA.
[5] Davis, D. a. (2002, April). Flood plain modeling Manual. HEC-RAS procuders for modelers, 1-32.
[6] EPCO. (2011). Fincha'a Amerti Nashe Hydroelectric project. Addis Ababa: unplished.
[7] FEMA. (2013, july). Federal guidelines for innundation mapping of flood risks associated with Dam incidents and failures. FEMA, p-946.
[8] G. B. (August, 2014). using HEC-RAS for Dam Break Analysis. USA: Hydraulic Engineering Center.
[9] Galata, M. H. (2012). Development of water projects and domestic hydropolitics. The Impacts of Water Projects in Ethiopia, 1-64.
[10] Gee, D. M. (July 1, 2010). Use Of Breach Process Models to estimate the HEC-RAS Dam breach Parameters. Federal Interagency (pp. 1-12). Las Vegas: Corps of Engineers Hydrologic Engineering center.
[11] Jabir, D. A. (2013). Criteria for safe Design of Embankment Dam. Handout for Master students..
[12] Kamanbedast, A., & Bryanvand, R. (2014). Effects of Dam Break on Downstream Lands Using Gis and Hec-Ras (Case. Advances in Environmental Biology, 2314-2321.
[13] Ministry of water irrigation and Energy. (2005). Hdraulic Design requirment. Addis Ababa.
[14] Sachin. (2014, may). Dam Break Analysis using Mike11. Master Thesis, 11. Safetybranch.
[15] C. D. (March 27–29, 2007). HEC-RAS DAM BREAK MODELING. Georgia Water Resources Conference (pp. 1-3). Atlanta: University of Georgia.
[16] Shahraki, A., Zadbar, A., Motevalli, M., & Aghajani, F. (2012). Modelling of Earth Dam Break with SMPDBK Case Study: Bidekan Earth Dam. World Applied Science, 376-386.
[17] West Consultants. (March, 2009). Dam Breach Study and Flood Inundation Mapping. Oregon: The City of Drain.
[18] Xiong, Y. (. (2011, march 28). A Dam Break Analysis Using HEC-RAS. Water Resource and Protection, 370-379.
[19] FEMA. 2016. How and Why Earth Dams Fail Technical Advisory for Dams in South Carolina. (Series of advisories prepared for FEMA under DR-4241-SC; these are unpublished, but available from FEMA).
[20] FEMA. 2017. Hurricane Matthew in North Carolina Dam Risk Management Assessment Report. FEMA.
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  • APA Style

    Motuma Shiferaw Regasa, Asie Kemal Jabir. (2019). Nashe Dam Fail and Risk Analysis. Engineering Science, 4(1), 12-27. https://doi.org/10.11648/j.es.20190401.12

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    ACS Style

    Motuma Shiferaw Regasa; Asie Kemal Jabir. Nashe Dam Fail and Risk Analysis. Eng. Sci. 2019, 4(1), 12-27. doi: 10.11648/j.es.20190401.12

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    AMA Style

    Motuma Shiferaw Regasa, Asie Kemal Jabir. Nashe Dam Fail and Risk Analysis. Eng Sci. 2019;4(1):12-27. doi: 10.11648/j.es.20190401.12

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  • @article{10.11648/j.es.20190401.12,
      author = {Motuma Shiferaw Regasa and Asie Kemal Jabir},
      title = {Nashe Dam Fail and Risk Analysis},
      journal = {Engineering Science},
      volume = {4},
      number = {1},
      pages = {12-27},
      doi = {10.11648/j.es.20190401.12},
      url = {https://doi.org/10.11648/j.es.20190401.12},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.es.20190401.12},
      abstract = {Nashe earth fill dam was constructed for the aim multi-purpose use (hydroelectric power and irrigation). While the construction of this dam many peoples around Dam were immigrated from their residential to another places including to the town. This research focused on the dam fail analysis by considering overtopping and piping failure mode. The input data were collected from Min. of Water and Energy, Federal Democratic Republic of Ethiopia (FDRE). The dam breach parameters were determined by applying the principle with Von Thun and Gillette. In dam break analysis the first step is model setup by using three dimensions (x, y and Z) of the downstream. By applying overtopping model, the peak discharge 8761.23m3/sec was obtained, which was more than 7.33 times the probable maximum flood and by applying piping mode, the peak discharge was obtained is 8620.85 m3/sec which was more than 7.21 times the probable maximum food at the nearby location of the dam. This indicates that, the peak outflow development during raining season was greater than inflow discharge flood (IDF) used as upper boundary condition for breach parameters. So it was summarized that high peak outflow and risk were developed to downstream by overtopping mode as compare by piping mode during occurrence of dam breach. As from the sensitivity analysis it was concluded, the effect of breach time on discharge is more sounded than the water level increase. This Dam Break modeling results obtained by studies could be used as flood mappings to assist the societies/communities for future planning developments in the flood prone areas/zones in advance.},
     year = {2019}
    }
    

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  • TY  - JOUR
    T1  - Nashe Dam Fail and Risk Analysis
    AU  - Motuma Shiferaw Regasa
    AU  - Asie Kemal Jabir
    Y1  - 2019/03/14
    PY  - 2019
    N1  - https://doi.org/10.11648/j.es.20190401.12
    DO  - 10.11648/j.es.20190401.12
    T2  - Engineering Science
    JF  - Engineering Science
    JO  - Engineering Science
    SP  - 12
    EP  - 27
    PB  - Science Publishing Group
    SN  - 2578-9279
    UR  - https://doi.org/10.11648/j.es.20190401.12
    AB  - Nashe earth fill dam was constructed for the aim multi-purpose use (hydroelectric power and irrigation). While the construction of this dam many peoples around Dam were immigrated from their residential to another places including to the town. This research focused on the dam fail analysis by considering overtopping and piping failure mode. The input data were collected from Min. of Water and Energy, Federal Democratic Republic of Ethiopia (FDRE). The dam breach parameters were determined by applying the principle with Von Thun and Gillette. In dam break analysis the first step is model setup by using three dimensions (x, y and Z) of the downstream. By applying overtopping model, the peak discharge 8761.23m3/sec was obtained, which was more than 7.33 times the probable maximum flood and by applying piping mode, the peak discharge was obtained is 8620.85 m3/sec which was more than 7.21 times the probable maximum food at the nearby location of the dam. This indicates that, the peak outflow development during raining season was greater than inflow discharge flood (IDF) used as upper boundary condition for breach parameters. So it was summarized that high peak outflow and risk were developed to downstream by overtopping mode as compare by piping mode during occurrence of dam breach. As from the sensitivity analysis it was concluded, the effect of breach time on discharge is more sounded than the water level increase. This Dam Break modeling results obtained by studies could be used as flood mappings to assist the societies/communities for future planning developments in the flood prone areas/zones in advance.
    VL  - 4
    IS  - 1
    ER  - 

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Author Information
  • Department of Hydraulic and Water Resources Engineering, Wollega University, Nekemte, Ethiopia

  • Department of Civil Engineering, Addis Ababa University, Addis Ababa, Ethiopia

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