CENTURY-SCALE SHORELINE CHANGES OF FIVE BEACHES IN JAPAN

Jun Yoshida, Keiko Udo, Yuriko Takeda, Akira Mano

Abstract


Coastal erosion caused by sea level rise is a serious problem for people all over the world. Global sea level will rise from 0.18 to 0.59 m (IPCC, 2007). Along the coasts in Japan, sea level will rise from 0.09 to 0.27 m by the end of this century. The future estimation considers only thermal expansion due to rising sea temperature caused by global warming. However, considering the contribution of scale-down of Greenland and Antarctic ice sheet, there is potential of the increase in the rate of sea level rise. There are few studies which evaluate impacts of the future beach erosion on society by comparing with the past shoreline change resulting from natural forces and human activities. This study evaluates the long-term shoreline changes due to natural forces and human activities by using old maps. Shoreline changes were influenced by natural forces from 1900 to 1950 and were influenced by human activities from 1950 to 1990. Shoreline changes showed that the changes tended to be stable after 1990, and coastal erosion due to climate change would likely become obvious in the future.

Keywords


beach erosion; shoreline change; old map; historical background; human activity

References


Agemori, C. 1977. On the erosion and some disasters at the Kochi coast. Kochi University Digital Rep-ository for Academic resources. http://hdl.handle.net/10126/2321 (in Japanese)

Bruun, P.1962. Sea-level rise as a cause of shore erosion, J. Waterways and Harbors Div. ASCE, 88(WW1), pp. 117-130.

Intergovernmental Panel on Climate Change (IPCC): Climate Change 2007. The Scientific Basis.

Japan Meteorological Agency. 2008. Global Warming Projection Vol.7.

Keqi Zhang, Bruce C. Douglas and Stephen P. Leatherman. 2004. Global Warming and Coastal Erosion. Climatic Change. Vol. 64, Numbers 1-2, 41-58.

Kishida, H., and Shimizu, M. 2000. Extraction of coastal erosion and deposition through coastal information survey, Proceeding of Coastal Engineering, JSCE, Vol.47, 681-685. (in Japanese)http://dx.doi.org/10.2208/proce1989.47.681

McGranahan DA, Balk D, Anderson B. 2007. The rising tide: assessing the risk of climate change and human settlements in low elevation coastal zones. Environ. Urban. 19:17-39http://dx.doi.org/10.1177/0956247807076960

Ministry of Land, Infrastructure, Transport and Tourism. National Institute for Land and Infrastructure Management. 2008. TECHNICAL NOTE of National Institute for Land and Infrastructure Management No.445 23-24.

Mimura, N., Kiyohashi, M., and Inoue, K. 1993. Impacts of sea-level rise on sandy beaches, Proceeding of Coastal Engineering, JSCE, Vol.40, 1046-1050. (in Japanese).http://dx.doi.org/10.2208/proce1989.40.1046

Mimura, N., Inoue, K., Kiyohashi, S., Izumiya, T., and Nobuoka, H. 1994. Impact assessment of sea level rise on sandy beaches (2): Verification of validity of projection model and nationwide scale assessment. Proceeding of Coastal Engineering, JSCE, Vol.41, 1161-1165. (in Japanese)http://dx.doi.org/10.2208/proce1989.41.1161

Mori, N., Iwashima, R., Yasuda, T., Mase, H., and Tracey H. Tom. 2009. Projection of Global Winds and Waves under Global Warming Scenario Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) Vol. 65, No. 1, 1271-1275. (in Japanese)

Roshanka Ranasinghe and Marcel J. F. Stive. 2009. Rising seas and retreating coastlines. Climatic Change Vol. 97, Numbers 3-4, 465-468,

Shinoda, T., Uda, T, and Okamura, Y. 1992. Proceeding of Coastal Engineering, JSCE, Vol.39, 346-1. (in Japanese)

Sugawa T, Udo K, Mimura N, and Mano A. 2011. Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) Vol. 67, No. 2, 1196-1200. (in Japanese)

Uda, T., Omata, A. and Minematsu, M. 1990. Crisis of sandy beaches along Sendai Bay area, Proceeding of Coastal Engineering, JSCE, Vol.37, 479-483. (in Japanese)http://dx.doi.org/10.2208/proce1989.37.479

Uda, T., and Noguchi, K. 1993. Beach changes caused by elongation of breakwater of Kashiwazaki Port, Proceeding of Coastal Engineering, JSCE, Vol.36, 229-244. (in Japanese)


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