Geological Considerations on the Effect of Sea-level Rise on Coastal Lowlands, in Particular in Developing Countries
Keywords
Holocene, coastal processes, sea-level reconstruction, sediment, budget, subsidence
Summary
The coastal lowlands of developing countries in particular are among the most densely populated and economically productive. Therefore, it is essential to get a realistic appraisal of the likely response of these areas to the predicted sea-level rise due to global warming. A short review of the different factors causing sea-level rise is presented and shows that the conception of global sea level must be abandoned. The method - ol ogies used to assess the impact of a sea-level rise are critically evaluated whereby it is noticed that the coastal processes and the controlling factors are not sufficiently considered. The geological history of the last 10,000 years of deltas and estuaries provides an analogue of the way coastal lowlands may respond to the predicted sea-level rise, and indic ates that these areas will be able to keep pace with the predicted rate of sea-level rise providing that sufficient sediment is continuously available and dikes are absent. The high rate of human-induced subsidence in big cities is a far more devastating problem than the effects of sea-level rise.
Paper
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