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Changing morphology of Ghana’s Accra coast

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Abstract

Coastal features in Ghana's Accra coast reflect both past and present processes that have been undergoing changes. These changes are influenced by a range of morphogenic factors such as geology and climatic conditions. These regimes have shaped the coastal geomorphic features through weathering processes that decompose and disintegrate the coastal rock. Sea level rise due to climate change is expected to increase coastal erosion and thus result in rapid changes in shoreline positions. Historic rate of sea level rise in Accra coast is about 2 mm/yr (Ibe & Quelennec, 1989) which is predicted to reach approximately 6 mm/yr in the next century since it conforms to the global change (Armah et al., 2005). This will result in flooding of vulnerable areas and enable waves to break closer inland. The effectiveness of the erosion process is aided considerably by the type of geology. Accra coastal zone has three types of rock in three identified geomorphic regions. They include unconsolidated and poorly consolidated rock along the western region, the Accraian series occupying the central region and the Dahomeyan series in the eastern region. The geology has thus influenced the extent to which the coastal features have changed and the type of cliff that is formed as a result of erosion within the regions. Generally, soft rock coastal features decay more rapidly than those of hard rock and tend to act as sediment sources. Human activities such as dam construction over the Densu River, engineering interventions to check the spread of erosion and sand mining has created sediment deficit which has exacerbated coastal erosion in Accra. Anthropogenic factors are estimated to account for 70-90% of coastal erosion problems in Accra.

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References

  • Amponsah PE (2004) Seismic activity in Ghana: past, present and future. Ann Geophys 47, N. 2/3

  • Appeaning Addo K (2009) Detection, measurement and prediction of shoreline change in Accra, Ghana. Lambert Academic Publishing, Germany

    Google Scholar 

  • Appeaning Addo K, Walkden M, Mills JP (2008) Detection, measurement and prediction of shoreline recession in Accra, Ghana. ISPRS J Photogramm Remote Sens 63(5):543–558

    Article  Google Scholar 

  • Alvarado F (2003) The Story of the Tsokomey Nature Centre. Environmental Studies Department. University of California, California. pp 99

  • AESC (1988) Fact-finding mission report-Ghana coastal environment. Accra, Ghana

    Google Scholar 

  • Akuffo SB (2003) “The Imminent Water Supply Crisis in Accra: The Silting up of the Weija Lake.”http://my.reset.jp/~adachihayao/030116W.htm. Accessed on 02/01/2006

  • AESC (1980) Coastal erosion and proposed protection works at Keta. Accra, Ghana

    Google Scholar 

  • Armah AK (1991) Coastal erosion in Ghana: causes, patterns, research needs and possible solutions. Coastal Zone ‘91 Conf., New York, pp 2463–2473

  • Armah AK, Amlalo DS (1998) Coastal Zone Profile of Ghana. Gulf of Guinea Large Marine Ecosystem Project. Ministry of Environment, Science and Technology. Accra, Ghana (Vii), p 111

    Google Scholar 

  • Armah AK, Wiafe G, Kpelle DG (2005) Sea-level rise and coastal biodiversity in West Africa: a case study from Ghana. In: Low PS (ed) Climate change and Africa. University press, Cambridge, pp 204–217

    Chapter  Google Scholar 

  • ACOPS (2003) “Supporting the Development and Implementation of Integrated Coastal Area Management (ICAM) in Sub-Saharan Africa.” http://www.acops.org/coastal_erosion.htm. Accessed on 14/06/2005

  • Amlalo DS (2005) “The Protection, Management and Development of the Marine and Coastal Environment of Ghana.” http://www.fig.net/pub/figpub/pub36/chapters/chapter_10.pdf#search=%22causes%20of%20shoreline%20erosion%20in%20ghana%22. Accessed on 28/09/2006

  • Bird E (2008) Coastal geomorphology: an introduction. John Wiley and Sons Ltd, Sussex–England. publishers, pg 411

  • Boateng I (2006) Shoreline Management Planning: Can It Benefit Ghana? A Case Study of UK SMPs and Their Potential Relevance in Ghana. https://www.fig.net/pub/accra/papers/ts16/ts16_04_boateng.pdf. Accessed on 20/11/2006

  • Bruun P (1962) Sea level rise as a cause of shore erosion. Journal of Waterway and Harbours Division ASCE 88(1):117–130

    Google Scholar 

  • Cooper JAG, Pilkey OH (2004) Sea-level rise and shoreline retreat: time to abandon the Bruun rule. Glob Planet Change 43(3–4):157–171

    Article  Google Scholar 

  • CoZSSA (2005) Second Conference on Coastal Zone in Sub-Sahara Africa. http://www.acops.org/CoZSSA/CoZSSA_conf_report_Jan06.pdf. Accessed on 15/10/06

  • Churcher C (2006) Linking National and Regional Efforts in Ocean and Coastal Management: African Perspectives. http://www.globaloceans.org/globalconferences/2006/pdf/AlbertOwusu-Sarpong.pdf. Accessed on 10/04/2006

  • Campbell MO (2006) The sustainability of coconut palm cocos nucifera linnaeus 1753 in coastal Ghana. J Coast Res 22(5):1118–1124

    Article  Google Scholar 

  • Davis RA (2005) Human impact on coasts. In: Schwartz ML (ed) Encyclopedia of coastal science, encyclopedia of earth sciences series. Springer, the Netherlands, pp 530–535

    Google Scholar 

  • Dickson KB (1965) Evolution of seaports in Ghana: 1800–1928. Ann Assoc Am Geogr 55(1):98–109

    Article  Google Scholar 

  • Dubois RN (1992) A re-evaluation of Bruun’s rule and supporting evidence. J Coast Res 8:618–627

    Google Scholar 

  • Duedall IW, Maul GA (2005) Demography of coastal populations. Encyclopaedia of coastal science. In: Schwartz ML (ed) Encyclopedia of coastal science, encyclopedia of earth sciences series. Springer, the Netherlands, pp 368–374

    Google Scholar 

  • EPA (2003) Information for Africa Climate Technology Transfer (IACTT). http://www.epa.gov.gh/iACTT/Ghana_VA%20Coastal%20Zone%20.pdf. Accessed on 10/04/05

  • Gordon C, Yankson K, Biney CA, Amlalo DS, Tumbulto JW, Kpelle D (1998) Report of the wetland typology working group: Ghana national wetland strategy. Accra, Ghana

    Google Scholar 

  • Gometal (2006) Facts about Ocean Tides. www.gometaldetecting.com/ocean-tides.html. Accessed on 01/01/2007

  • Geoconsultants (2005) Proposed Bridge over River Densu on the Mallam-Kasoa road. Result of Test Borings-(1), Accra, Ghana

  • Hands EB (1983) The Great Lakes as a test model for profile responses to sea level changes. In: Komar PD (ed) Handbook of coastal processes and erosion. CRC Press, Florida, pp 176–189

    Google Scholar 

  • Ibe AC, Quelennac RE (1989) Methodology for Assessment and Control of Coastal Erosion in West Africa and Central Africa. UNEP Regional Sea Reports and Studies No. 107. United Nations Environment Programme. New York, USA

  • Ibe AC (1996) The coastal zone and oceanic problems of Sub-Saharan Africa. In: Benneh G, Morgan WB, Uitto JI (eds) Sustaining the future: economic, social and environmental change in Sub-Saharan Africa. UN University press, Tokyo, p 380

    Google Scholar 

  • IPCC (2001) Climate Change (2001). Impacts, Adaptation and Vulnerability. Contribution of Working Group II to the Third Assessment Report of the Intergovernmental Panel on Climate Change. University Press, Cambridge, p 1005

    Google Scholar 

  • IPCC (2007) Climate Change 2007: The Physical Science Basis (Summary for Policymakers). Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change. http://www.ipcc.ch/SPM2feb07.pdf. Accessed on 20/04/2007

  • Inman DL, Nordstrom CE (1971) On the tectonic and morphologic classification of coasts. J Geol 79:1–21

    Article  Google Scholar 

  • Inman DL, Jenkins SA, Masters PM (2003) Modeling Platforms, Terraces and Coastal Evolution. UC San Diego: Scripps Institution of Oceanography. Retrieved from: http://escholarship.org/uc/item/91x995dg

  • Leatherman SP (2001) Social and economic costs of sea-level rise. In: Douglas BC, Kearney MS, Leatherman SP (eds) Sea-level rise, history and consequences. International geophysics series vol. 75. Academic, NY, pp 181–223

    Chapter  Google Scholar 

  • Lowenstein F (1985) Beaches or bedrooms—the choice as sea level rises. Oceanus 28:20–29

    Google Scholar 

  • Mensah JV (1997) Causes and effects of coastal sand mining in Ghana. Singap J Trop Geogr 18(1):69–88

    Article  Google Scholar 

  • Muff R, Efa E (2006) Ghana-Germany technical cooperation project: environmental and engineering geology for urban planning in the Accra-Tema area. Explanatory notes for the geological map for urban planning 1:50 000 of Greater Accra Metropolitan Area. Accra, Ghana

    Google Scholar 

  • Morton RA (2003) An Overview of Coastal Land Loss: With Emphasis on the Southeastern United States. USGS Open File Report 03-337. http://pubs.usgs.gov/of/2003/of03-337/morphology.html. Accessed on 01/05/2006

  • Norley N (2006) Agambila alarmed at sea erosion, Ghanaian Chronicle. Accra, Ghana

    Google Scholar 

  • Osei-Wusuansa H (2000) Implications of Accelerated Sea-Level Rise (ASLR) & Climate Change for Ghana. Proc. of SURVAS Expert Workshop on: African Vulnerability & Adaptation to Impacts of Accelerated Sea-Level Rise (ASLR), Cairo, Egypt, pp 24–27

  • Osterkamp WRA, Morton RA (2005) In: Schwartz ML (ed) Encyclopedia of coastal science, encyclopedia of earth sciences series. Springer, the Netherlands, pp 645–647

    Google Scholar 

  • Ontowirjo B, Istiyanto CD (2003) Methodology of Sandy Beach stabilisation by nourishment: a long term morph dynamic modelling approach. In: Goudas C, Katsiaris G, May V (eds) Soft shore protection. Kluwer publishers, the Netherlands, pp 71–79

    Chapter  Google Scholar 

  • Pethick J (1984) An introduction to coastal geomorphology. Wiley, New York

    Google Scholar 

  • Pilkey OH, Robert SY, Stanley RR, Sam Smith AW, Wu H, Walter DP (1993) The concept of shoreface profile equilibrium: a critical review. J Coast Res 9:255–278

    Google Scholar 

  • Rosen PS (1977) Increasing shoreline erosion rates with decreasing tidal range in the Virginia Chesapeake Bay. Chesap Sci 18(4):383–386

    Article  Google Scholar 

  • Svašek Hydraulics (2006) Measured Wave data. Rotterdam, the Netherlands

  • Storms JEA, Weltje GJ, van Dyke JJ, Geel CR, Kroonenberg SB (2002) Process-response modelling of wave-dominated coastal systems: simulating evolution and stratigraphy on geological timescales. J Sediment Res 72(2):226–239

    Article  Google Scholar 

  • Wellens-Mensah J (1994) Aspects of coastal erosion in West Africa—the case of the Bight of Benin. In IOC-UNEP-WMO-SAREC Planning Workshop On An Integrated Approach To Coastal Erosion, Sea Level Change And Their Impacts. Zanzibar, Tanzania

  • Wellens-Mensah J, Armah AK, Amlalo DS, Tetteh K (2002) Ghana National Report Phase 1: Integrated Problem Analysis. GEF MSP Sub-Saharan Africa Project (GF/6010-0016): Development and Protection of the Coastal and Marine Environment in Sub-Saharan Africa. Accra, Ghana

  • World Bank (1995) World Bank Africa: A Framework for Integrated Coastal Zone Management, Environmental Sustainable Development Division and Land, Water and Habitat Division, Africa Region. World Bank, Washington DC

  • Zhang K, Douglas BC, Leatherman SP (2004) Global warming and coastal erosion. Clim Change 64:41–58

    Article  Google Scholar 

Download references

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  1. Department of Oceanography and Fisheries, University of Ghana, P. O. Box LG 99, Legon-Accra, Ghana

    Kwasi Appeaning Addo

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Appeaning Addo, K. Changing morphology of Ghana’s Accra coast. J Coast Conserv 15, 433–443 (2011). https://doi.org/10.1007/s11852-010-0134-z

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  • DOI: https://doi.org/10.1007/s11852-010-0134-z

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