Impacts of lagoon opening and implications for coastal management: case study from Muni-Pomadze lagoon, Ghana

Journal article


Davies-Vollum, S., Zhang, Zihao and Agyekumhene, Andrews 2018. Impacts of lagoon opening and implications for coastal management: case study from Muni-Pomadze lagoon, Ghana. Jounral of Coastal Conservation. https://doi.org/10.1007/s11852-018-0658-1
AuthorsDavies-Vollum, S., Zhang, Zihao and Agyekumhene, Andrews
Abstract

Lagoon-barrier systems are a dynamic coastal environment. When an ephemeral connection between a lagoon and the ocean develops, it has significant impact on hydrology, sedimentology and ecology. Increasingly, human actions and sea level rise also influence lagoons with the potential to increase their connectivity with the ocean. TheMuni-Pomadze lagoon in central Ghana is a small lagoon-barrier system that is intermittently open to the ocean. Following opening in 2014 the lagoon was open to the ocean for more than two years. Causes for the unusually long period of lagoon opening are unclear although human intrevention has played a role. Field observation, digital mapping and GIS analysis of the shoreline during the two year period of lagoon opening has enabled an understanding of how the lagoon-ocean connection has impacted coastal morphology, erosion and sedimentation. Opening has resulted in rapid changes to the location of the barrier breaching (tidal inlet), erosion on the barrier and sedimentation in the lagoon. Such modifications have implications for local resources and ecosystem services that underpin the livelihood and wellbeing of local communities. Elucidating how a connection to the ocean impacts lagoons and the coastal communities they support are important to managing lagoons not only in Ghana but across West Africa.

Lagoon-barrier systems are a dynamic coastal environment. When an ephemeral connection between a lagoon and the ocean
develops, it has significant impact on hydrology, sedimentology and ecology. Increasingly, human actions and sea level rise also
influence lagoons with the potential to increase their connectivity with the ocean. TheMuni-Pomadze lagoon in central Ghana is
a small lagoon-barrier system that is intermittently open to the ocean. Following opening in 2014 the lagoon was open to the
ocean for more than two years. Causes for the unusually long period of lagoon opening are unclear although human intrevention
has played a role. Field observation, digital mapping and GIS analysis of the shoreline during the two year period of lagoon
opening has enabled an understanding of how the lagoon-ocean connection has impacted coastal morphology, erosion and
sedimentation. Opening has resulted in rapid changes to the location of the barrier breaching (tidal inlet), erosion on the barrier
and sedimentation in the lagoon. Such modifications have implications for local resources and ecosystem services that underpin
the livelihood and wellbeing of local communities. Elucidating how a connection to the ocean impacts lagoons and the coastal
communities they support are important to managing lagoons not only in Ghana but across West Africa.

KeywordsCoastal management; Shoreline change; Ghana; Lagoon
Year2018
JournalJounral of Coastal Conservation
PublisherSpringer
ISSN1400-0350
1874-7841
Digital Object Identifier (DOI)https://doi.org/10.1007/s11852-018-0658-1
Web address (URL)http://hdl.handle.net/10545/623173
hdl:10545/623173
Publication dates18 Sep 2018
Publication process dates
Deposited04 Dec 2018, 14:42
ContributorsUniversity of Derby, University of Virginia and Wildlife Division (Forestry Commission)Winneba,Ghana
File
File Access Level
Open
Permalink -

https://repository.derby.ac.uk/item/941qq/impacts-of-lagoon-opening-and-implications-for-coastal-management-case-study-from-muni-pomadze-lagoon-ghana

Download files

  • 12
    total views
  • 0
    total downloads
  • 2
    views this month
  • 0
    downloads this month

Export as

Related outputs

Climate change impact and adaptation: Lagoonal fishing communities in west Africa
Davies-Vollum, S., Raha, D. and Koomson, Daniel 2021. Climate change impact and adaptation: Lagoonal fishing communities in west Africa. in: Springer.
Characterising the vulnerability of fishing households to climate and environmental change: Insights from Ghana
Koomson, Daniel, Davies-Vollum, S. and Raha, D. 2020. Characterising the vulnerability of fishing households to climate and environmental change: Insights from Ghana. Marine Policy. https://doi.org/10.1016/j.marpol.2020.104142
Geohazard assessment of landslides in south Brazil: Case study
Hamza, Omar, De Vargas, Tiago, Boff, Fernando Eduardo, Hussain, Yawar and Davies-Vollum, S. 2019. Geohazard assessment of landslides in south Brazil: Case study. Geotechnical and Geological Engineering. https://doi.org/10.1007/s10706-019-01054-1
The impact of freshwater mussels (order Unionoida) on river bed characteristics and sediment flux: A flume-based study.
Leng, Andrea, Davies-Vollum, S. and Ramsey, Andrew 2018. The impact of freshwater mussels (order Unionoida) on river bed characteristics and sediment flux: A flume-based study.
Repairing a shield tunnel damaged by secondary grouting.
Jin-long, Liu, Hamza, Omar, Davies-Vollum, S. and Jie-qun, Liu 2018. Repairing a shield tunnel damaged by secondary grouting. Tunnelling and Underground Space Technology. https://doi.org/10.1016/j.tust.2018.07.016
Geology of Caphouse Colliery, Wakefield, Yorkshire, UK
Davies-Vollum, S., Guion, Paul. D., Knight, John. A. and Smith, Andrew 2016. Geology of Caphouse Colliery, Wakefield, Yorkshire, UK. Proceedings of the Yorkshire Geological Society. https://doi.org/10.1144/pygs2015-372
Climate, dust, and fire across the Eocene-Oligocene transition, Patagonia
Selkin, Peter. A., Stromberg, Caroline. A. E., Dunn, Regan., Kohn, Matthew. J., Carlini, Alfredo. A., Davies-Vollum, S. and Madden, Richard. H. 2015. Climate, dust, and fire across the Eocene-Oligocene transition, Patagonia. Geology. https://doi.org/10.1130/G36664.1
Teaching sedimentology: opportunities for interdisciplinary, variety, innovation and employability.
Davies-Vollum, S., Satterfield, Dorothy, Suthren, Roger and Whiteley, Martin 2015. Teaching sedimentology: opportunities for interdisciplinary, variety, innovation and employability. British Sedimentological Research Group.
Shoreline change and sea level rise at the Muni-Pomadze coastal wetland (Ramsar site), Ghana
Davies-Vollum, S. and West, Matthew 2015. Shoreline change and sea level rise at the Muni-Pomadze coastal wetland (Ramsar site), Ghana. Journal of Coastal Conservation. https://doi.org/10.1007/s11852-015-0403-y