Seismic Risk Analysis for Large Dams in West Africa Region

Stephen Ayanfe Irinyemi; Domenico Lombardi; Syed Mohammed Ahmad

doi:doi:10.11648/j.earth.20221104.16

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Seismic Risk Analysis for Large Dams in West Africa Region

Stephen Ayanfe Irinyemi, Domenico Lombardi, Syed Mohammed Ahmad

Published in Earth Sciences (Volume 11, Issue 4)

Received: 24 September 2021 Accepted: 27 October 2021 Published: 26 July 2022

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Abstract

Dams are critical infrastructures, the failure of which would cause a catastrophic effect on a regional scale. West Africa has more than 150 large dams across the region, constructed in strategic locations which pose a potential risk for people and properties at the downstream paths. A method of seismic risk analysis for large dams within the West Africa region is discussed to evaluate the seismic hazard rating at the dam sites and the risk rating of its appurtenant structures. Although the study region is considered as a stable continental, two major earthquakes with casualty figures have been reported in Ghana and Guinea areas of the study basins in 1939 and 1983, respectively. This paper summarizes the procedures for analyses seismic risk and explain the seismic hazards of seventeen large dams selected within the study basins based mostly on the significance of each dam and location of earthquakes in and around the dam sites. The results show the values of peak ground acceleration (PGA) at dam sites ranges from 0.02 g to 0.45 g. A hazard map of PGA indicating preliminary analysis of dam structures was developed for the study basins. Based on the results of this analyses, 59% of the analysed dams identified as high-risk dams while the rest dams fall within the moderate-risk class. These dams require further analyses for their safety to protect the populace and the built environments along the downstream paths.

Published in	Earth Sciences (Volume 11, Issue 4)
DOI	10.11648/j.earth.20221104.16
Page(s)	204-213
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

Dam, Seismic Risk, Peak Ground Acceleration, West Africa Basins

References

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APA Style

Stephen Ayanfe Irinyemi, Domenico Lombardi, Syed Mohammed Ahmad. (2022). Seismic Risk Analysis for Large Dams in West Africa Region. Earth Sciences, 11(4), 204-213. https://doi.org/10.11648/j.earth.20221104.16

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ACS Style

Stephen Ayanfe Irinyemi; Domenico Lombardi; Syed Mohammed Ahmad. Seismic Risk Analysis for Large Dams in West Africa Region. Earth Sci. 2022, 11(4), 204-213. doi: 10.11648/j.earth.20221104.16

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AMA Style

Stephen Ayanfe Irinyemi, Domenico Lombardi, Syed Mohammed Ahmad. Seismic Risk Analysis for Large Dams in West Africa Region. Earth Sci. 2022;11(4):204-213. doi: 10.11648/j.earth.20221104.16

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@article{10.11648/j.earth.20221104.16,
  author = {Stephen Ayanfe Irinyemi and Domenico Lombardi and Syed Mohammed Ahmad},
  title = {Seismic Risk Analysis for Large Dams in West Africa Region},
  journal = {Earth Sciences},
  volume = {11},
  number = {4},
  pages = {204-213},
  doi = {10.11648/j.earth.20221104.16},
  url = {https://doi.org/10.11648/j.earth.20221104.16},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.earth.20221104.16},
  abstract = {Dams are critical infrastructures, the failure of which would cause a catastrophic effect on a regional scale. West Africa has more than 150 large dams across the region, constructed in strategic locations which pose a potential risk for people and properties at the downstream paths. A method of seismic risk analysis for large dams within the West Africa region is discussed to evaluate the seismic hazard rating at the dam sites and the risk rating of its appurtenant structures. Although the study region is considered as a stable continental, two major earthquakes with casualty figures have been reported in Ghana and Guinea areas of the study basins in 1939 and 1983, respectively. This paper summarizes the procedures for analyses seismic risk and explain the seismic hazards of seventeen large dams selected within the study basins based mostly on the significance of each dam and location of earthquakes in and around the dam sites. The results show the values of peak ground acceleration (PGA) at dam sites ranges from 0.02 g to 0.45 g. A hazard map of PGA indicating preliminary analysis of dam structures was developed for the study basins. Based on the results of this analyses, 59% of the analysed dams identified as high-risk dams while the rest dams fall within the moderate-risk class. These dams require further analyses for their safety to protect the populace and the built environments along the downstream paths.},
 year = {2022}
}

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TY  - JOUR
T1  - Seismic Risk Analysis for Large Dams in West Africa Region
AU  - Stephen Ayanfe Irinyemi
AU  - Domenico Lombardi
AU  - Syed Mohammed Ahmad
Y1  - 2022/07/26
PY  - 2022
N1  - https://doi.org/10.11648/j.earth.20221104.16
DO  - 10.11648/j.earth.20221104.16
T2  - Earth Sciences
JF  - Earth Sciences
JO  - Earth Sciences
SP  - 204
EP  - 213
PB  - Science Publishing Group
SN  - 2328-5982
UR  - https://doi.org/10.11648/j.earth.20221104.16
AB  - Dams are critical infrastructures, the failure of which would cause a catastrophic effect on a regional scale. West Africa has more than 150 large dams across the region, constructed in strategic locations which pose a potential risk for people and properties at the downstream paths. A method of seismic risk analysis for large dams within the West Africa region is discussed to evaluate the seismic hazard rating at the dam sites and the risk rating of its appurtenant structures. Although the study region is considered as a stable continental, two major earthquakes with casualty figures have been reported in Ghana and Guinea areas of the study basins in 1939 and 1983, respectively. This paper summarizes the procedures for analyses seismic risk and explain the seismic hazards of seventeen large dams selected within the study basins based mostly on the significance of each dam and location of earthquakes in and around the dam sites. The results show the values of peak ground acceleration (PGA) at dam sites ranges from 0.02 g to 0.45 g. A hazard map of PGA indicating preliminary analysis of dam structures was developed for the study basins. Based on the results of this analyses, 59% of the analysed dams identified as high-risk dams while the rest dams fall within the moderate-risk class. These dams require further analyses for their safety to protect the populace and the built environments along the downstream paths.
VL  - 11
IS  - 4
ER  -

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Author Information

Stephen Ayanfe Irinyemi

Department Mechanical, Aerospace and Civil Engineering, University of Manchester, Manchester, UK
Domenico Lombardi

Department Mechanical, Aerospace and Civil Engineering, University of Manchester, Manchester, UK
Syed Mohammed Ahmad

Department Mechanical, Aerospace and Civil Engineering, University of Manchester, Manchester, UK

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Plain Text BibTeX RIS

APA Style

Stephen Ayanfe Irinyemi, Domenico Lombardi, Syed Mohammed Ahmad. (2022). Seismic Risk Analysis for Large Dams in West Africa Region. Earth Sciences, 11(4), 204-213. https://doi.org/10.11648/j.earth.20221104.16

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ACS Style

Stephen Ayanfe Irinyemi; Domenico Lombardi; Syed Mohammed Ahmad. Seismic Risk Analysis for Large Dams in West Africa Region. Earth Sci. 2022, 11(4), 204-213. doi: 10.11648/j.earth.20221104.16

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AMA Style

Stephen Ayanfe Irinyemi, Domenico Lombardi, Syed Mohammed Ahmad. Seismic Risk Analysis for Large Dams in West Africa Region. Earth Sci. 2022;11(4):204-213. doi: 10.11648/j.earth.20221104.16

Copy | Download

@article{10.11648/j.earth.20221104.16,
  author = {Stephen Ayanfe Irinyemi and Domenico Lombardi and Syed Mohammed Ahmad},
  title = {Seismic Risk Analysis for Large Dams in West Africa Region},
  journal = {Earth Sciences},
  volume = {11},
  number = {4},
  pages = {204-213},
  doi = {10.11648/j.earth.20221104.16},
  url = {https://doi.org/10.11648/j.earth.20221104.16},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.earth.20221104.16},
  abstract = {Dams are critical infrastructures, the failure of which would cause a catastrophic effect on a regional scale. West Africa has more than 150 large dams across the region, constructed in strategic locations which pose a potential risk for people and properties at the downstream paths. A method of seismic risk analysis for large dams within the West Africa region is discussed to evaluate the seismic hazard rating at the dam sites and the risk rating of its appurtenant structures. Although the study region is considered as a stable continental, two major earthquakes with casualty figures have been reported in Ghana and Guinea areas of the study basins in 1939 and 1983, respectively. This paper summarizes the procedures for analyses seismic risk and explain the seismic hazards of seventeen large dams selected within the study basins based mostly on the significance of each dam and location of earthquakes in and around the dam sites. The results show the values of peak ground acceleration (PGA) at dam sites ranges from 0.02 g to 0.45 g. A hazard map of PGA indicating preliminary analysis of dam structures was developed for the study basins. Based on the results of this analyses, 59% of the analysed dams identified as high-risk dams while the rest dams fall within the moderate-risk class. These dams require further analyses for their safety to protect the populace and the built environments along the downstream paths.},
 year = {2022}
}

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TY  - JOUR
T1  - Seismic Risk Analysis for Large Dams in West Africa Region
AU  - Stephen Ayanfe Irinyemi
AU  - Domenico Lombardi
AU  - Syed Mohammed Ahmad
Y1  - 2022/07/26
PY  - 2022
N1  - https://doi.org/10.11648/j.earth.20221104.16
DO  - 10.11648/j.earth.20221104.16
T2  - Earth Sciences
JF  - Earth Sciences
JO  - Earth Sciences
SP  - 204
EP  - 213
PB  - Science Publishing Group
SN  - 2328-5982
UR  - https://doi.org/10.11648/j.earth.20221104.16
AB  - Dams are critical infrastructures, the failure of which would cause a catastrophic effect on a regional scale. West Africa has more than 150 large dams across the region, constructed in strategic locations which pose a potential risk for people and properties at the downstream paths. A method of seismic risk analysis for large dams within the West Africa region is discussed to evaluate the seismic hazard rating at the dam sites and the risk rating of its appurtenant structures. Although the study region is considered as a stable continental, two major earthquakes with casualty figures have been reported in Ghana and Guinea areas of the study basins in 1939 and 1983, respectively. This paper summarizes the procedures for analyses seismic risk and explain the seismic hazards of seventeen large dams selected within the study basins based mostly on the significance of each dam and location of earthquakes in and around the dam sites. The results show the values of peak ground acceleration (PGA) at dam sites ranges from 0.02 g to 0.45 g. A hazard map of PGA indicating preliminary analysis of dam structures was developed for the study basins. Based on the results of this analyses, 59% of the analysed dams identified as high-risk dams while the rest dams fall within the moderate-risk class. These dams require further analyses for their safety to protect the populace and the built environments along the downstream paths.
VL  - 11
IS  - 4
ER  -

Copy | Download