Impact details: land inundation

impact chain for tropical coastal areas / sea-level rise (click nodes to view details):
selected case study results:
Case study reference
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Impact description (case study)
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Appeaning Addo, K., Larbi, L., Amisigo, B., & Ofori-Danson, P. K. (2011). Impacts of coastal inundation due to climate change in a cluster of urban coastal communities in Ghana, West Africa. Remote Sensing, 3(9), 2029-2050. West Africa: Ghana The Dansoman coastline could recede by about 202 m by the year 2100 relative to the baseline of 1970-1990. Analysis of the likely impacts of coastal inundation in the Panbros, Grefi and Gbegbeyise communities revealed that about 650,000 people, 926 buildings and a total area of about 0.80 km2 of land are vulnerable to permanent inundation by the year 2100. Significant losses to both life and property will occur in this scenario. -

Saleem Khan, A., Ramachandran, A., Usha, N., Punitha, S., & Selvam, V. (2012). Predicted impact of the sea-level rise at Vellar-Coleroon estuarine region of Tamil Nadu coast in India: Mainstreaming adaptation as a coastal zone management option. Ocean & Coastal Management. South Asia: India In the low-lying area of Vellar-Coleroon estuarine, Tamil Nadu coast, India, about 1,570 ha of the LULC (Land use and Land cover) of the study area would be permanently inundated to 0.5 m and 2,407 ha for 1 m SLR. This will result in the loss of three major coastal natural resources: coastal agriculture, mangroves and aquaculture. -

Volonté, C. R., & Arismendi, J. (1995). Sea-level rise and Venezuela: potential impacts and responses. Journal of Coastal Research, 285-302. South America Venezuela Assuming a no-protection response and a one-meter rise in sea level, nearly 6,000 km² of land could be lost, mainly by inundation of the Orinoco delta. Land loss due to erosion is minor compared to inundation, but it could damage infrastructure and buildings. In total, land and buildings presently worth about U.S. $350 million could be destroyed (excluding damage to harbors) and 56,000 to 62,000 people could be displaced from their homes. Nourishment of recreational beaches and construction of seawalls along 200 km of developed coastlines combined with harbor upgrade could cost U.S. $1.0 to $1.5 billion for a one-meter rise in sea level. Assuming this investment occurred linearly over 50 years (2051 to 2100), this represents annual expenditure of 0.46% to 0.70% of Venezuela's gross national investment (in 1990). While Venezuela's developed coastline appears vulnerable to accelerated sea-level rise, increasing planning and coastal management efforts could avoid increasing future vulnerability, particularly for the large coastal frontage (>2,000 km) where little or no development exists today.

Perez, R. T., Amadore, A., & Feir, R. B. (1999). Climate change impacts and responses in the Philippines coastal sector. Climate Research, 12, 97-107. Southeast Asia: Philippines Modeling results for Manila Bay show that land inundation due to one-meter rise in sea-level would affect coastal barangays from 19 municipalities of Metro Manila, Bulacan, and Cavite and would cover an area of 5,555 ha. Proposed response strategies consist of protecting the coast by building sea walls; institutional actions such as formulation of setback policies and construction regulations; and adaptive planning in the context of an integrated coastal zone management to address the short- and long-term problems, with the involvement of communities in the area. Information, education, and communication are essential along with the technical and scientific efforts to achieve a well-balanced adaptation plan.

Chemane, D., Motta, H., & Achimo, M. (1997). Vulnerability of coastal resources to climate changes in Mozambique: a call for integrated coastal zone management. Ocean & coastal management, 37(1), 63-83. Southeast Africa: Mozambique The sea water will inundate the low relief marshes which will openly connect to the sea following erosion of the existing beach ridge beyond the sea wall. Water-logging problems already exist and they are expected to increase (Scenario 1). The remaining coastal ridges will be overwashed by waves and the low relief plains inundated by sea water. Part of the town, including the port and probably the airport, will be inundated at high tides during spring. (Scenario 2). A kind of relief induced barrier islands could be formed. It is estimated that 40% or around 42.5 km2 of the total area of the city will be permanently inundated (Scenario 3). The National Environmental Management Programme (NEMP) establishes integrated coastal zone management (ICZM) that will be based on coordination between the relevant stakeholders (institutions and communities) and on a programme which should be designed and accepted by them. The main issues for this programme are (1) fisheries, (2) coastal and marine ecosystems management, (3) coastal and marine protection, (4) marine parks and (5) tourism.

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