Advances in Earth Science ›› 2000, Vol. 15 ›› Issue (5): 598-603. doi: 10.11867/j.issn.1001-8166.2000.05.0598

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RESPONSE OF COAST TO SEA-LEVEL RISE:A REVIEW OF STUDY METHODS

LI Heng-peng, YANG Gui-shan   

  1. Nanjing Institute of Geography and Limnology,CAS,Nanjing 210008,China
  • Received:1999-10-17 Revised:2000-05-29 Online:2000-10-01 Published:2000-10-01

LI Heng-peng, YANG Gui-shan. RESPONSE OF COAST TO SEA-LEVEL RISE:A REVIEW OF STUDY METHODS[J]. Advances in Earth Science, 2000, 15(5): 598-603.

The coasts, the belts of 150 km from coastline (according to the definition of UNCEDDE) are the areas with the most dense population, about one half of the world. Affected by the accelerated sea-level rise in the next century, the coasts will response by the complicated process, which pose threats to the surviving of the mankind and result in the unsustainable development of coastal area. The threats have been concerned by the worldwide people. In this paper, the study methods of coast response to SLR are reviewed, including the coast response record, the equilibrium profile and the numerical stimulation. These methods have their own application ranges, advantages and limitations. Historical trend analysis is a simple method and easy to be implemented. By this method, the trend of evolution in past and present can be known. The trend of the future is inaccurate because the short records and the different environment feature in the future. There are lots of reports about the comparative research with the Quaternary coast evolution, but it' s not accurate enough to predict the trend of the next century due to the resolution of measure is poor and the scale of time is different. We only implement qualitative research by this method. The equilibrium profile study is easy to be implemented and relative accurate to the sandy coast. Any coastal profile will change continuously in response to the prevailing hydrodynamic conditions. Thus an instantaneous profile may not represent the equilibrium state. The equilibrium profile should be temporally-averaged and stable over the temporal scale on which the equilibrium is considered. To the wetland, we can not confirm the existence of equilibrium and the formation of the equilibrium due to the complex organic sediment. The prediction is not appropriate and the response time which affect the accurate of prediction should be considered. With the development of the computer, the researchers have made the great progress. At relatively little coast, we can model the trend of response to the different sea level rise scenery. The widest use of numerical model has been used to the engineering application. We need make a further study to the dynamic process of coast, which can improve the modeling result.

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