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    Shoreline change and sea level rise at the Muni-Pomadze coastal wetland (Ramsar site), Ghana

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    Authors
    Davies-Vollum, K. Siân cc
    West, Matthew
    Affiliation
    Sheffield Hallam University
    University of Virginia, Charlottesville, USA
    Issue Date
    2015-08-09
    
    Metadata
    Show full item record
    Abstract
    Lagoon-wetland systems are common along low-lying coastlines. They provide rich species habitats, multiple ecosystem services and socio-economic activities. They are particularly susceptible to the impacts of sea level rise (SLR), especially in less developed countries (LDCs) where economic and development constraints limit adaptation. The Muni-Pomadze lagoon is one of five coastal Ramsar sites in Ghana and one of many along the country’s coastline. It is an intermittently closed lagoon with extreme seasonal hydrological and physico-chemical variation. Field observation, digital mapping and GIS analysis of the shoreline has enabled an understanding of coastal change and SLR at the lagoon. From 1972 to 2014 the high water mark has shifted landwards with an average retreat rate of 0.22 m/year. Evidence of erosion and sediment washover indicate loss of and a shift landward of the sand barrier separating the lagoon from the ocean. Creation of an inundation map for a one-meter rise of sea level reveals fragementation and breaching of the barrier and an increasingly permanent connection to the ocean. A more open lagoon system stabilises hydrological and physico-chemical conditions, leading to increases in biodiversity and aquatic productivity. The lagoon currently has no consideration of SLR in its management plan. The results of this analysis and the limited development of the Muni-Pomadze lagoon support a no intervention approach to coastal management that allows SLR to transform the closed lagoon to an open estuary. A similar approach at comparable coastal wetland systems in Ghana and in other LDCs could prove an effective management option.
    Citation
    Davies-Vollum, K. Siân and West, M., 'Shoreline change and sea level rise at the Muni-Pomadze coastal wetland (Ramsar site), Ghana', Journal of Coastal Conservation, 19 (4):515. DOI: 10.1007/s11852-015-0403-y
    Publisher
    Springer
    Journal
    Journal of Coastal Conservation
    URI
    http://hdl.handle.net/10545/620621
    DOI
    10.1007/s11852-015-0403-y
    Additional Links
    http://link.springer.com/10.1007/s11852-015-0403-y
    http://link.springer.com/journal/11852
    Type
    Article
    Language
    en
    ISSN
    1400-0350
    1874-7841
    ae974a485f413a2113503eed53cd6c53
    10.1007/s11852-015-0403-y
    Scopus Count
    Collections
    Environmental Sustainability Research Centre

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