Review on Coastline Change and Its Response Along the Cotonou Coast, Benin in the Gulf of Guinea, West Africa = 서아프리카 기니만에 있는 베냉 코토누의 해안선 변화와 대응에 대한 고찰

다국어 초록 (Multilingual Abstract)

The global surface temperature has risen critically over the past century and according to the IPCC Fifth Assessment Report 2014, existing risks in natural and human systems will worsen. Coastal erosion is mostly caused by climate change and among all the coastal areas at risk, Benin, which is part of the Gulf of Guinea, has been ranked very highly as a vulnerable region. Therefore, in this review, we focus on the evolution of coastline change in Cotonou of Benin, summarizing its resultant impacts and applied measures around the coast area by reviewing previous studies. Signs of coastal erosion in Cotonou appeared in 1963. After 39 years, the east shoreline of Cotonou has retreated by 885 m, resulting in the disappearance of more than 800 houses. To solve this problem, Benin authorities built seven groynes in 2013, and have increased the number of the structure as a way to interrupt water flow and limit the movement of sediment. Over the region, shorelines appeared preserved accordingly. In contrast, areas located further east, where groynes were not installed, have suf ered from intensive erosion at a rate of 49 m/yr. In the future, as a next step, the effectiveness of groynes should be studied with local and broader perspectives.

참고문헌 (Reference)

1 강윤구, "파향제어방식을 이용한 새로운 해안침식대책 기술 개발(1): 해안침식 발생ㆍ대책 동향 및 신방식 제안" (사)한국연안방재학회 3 (3): 14-35, 2016

2 "Worldometer"

3 WMO, "World Meteorological Organization"

4 Melet, A., "What dominates sea level at the coast: a case study for the Gulf of Guinea" 66 : 623-636, 2016

5 Bokonon-Ganta, E., "Vulnérabilité et adaptation du secteur santé - établissements humains - littoral au changement climatique" Université Nationale du Bénin / Faculté des Lettres, Arts et Siences Humaines 1999

6 Gomez, M. L. A., "Vulnerability to coastal erosion in the Gambia:empirical experience from Gunjur" 45 (45): 2020

7 Colleuil, B., "Un modèle d’environnement lagunaire soumis aux conditions des climats équatoriaux tempérés: le lac Nokoué" Université de Bordeaux 1984

8 Dossou, K. M. R., "The vulnerability to climate change of Cotonou (Benin): the rise in sea level" 19 (19): 65-79, 2007

9 MEHU, "Stratégie nationale de mise en oeuvre au Bénin de la convention cadre des Nations Unies sur les changements climatiques" UNDP and UNITAR 80-, 2003

10 KNMI, "Royal Netherlands Meteorological Institute"

11 Longueville, F. D., "Perceptions of and responses to coastal erosion risks: The case of Cotonou in Benin" 51 (51): 2020

12 NASA, "NASA GISS: NASA News and Feature Releases:New Studies Increase Confidence in NASA’s Measure of Earth’s Temperature"

13 Choi, K. H., "Migration of coastal erosional hotspots due to coastal protection structures" 1 (1): 1062-1066, 2016

14 Boer, W. de, "Mapping the sandy beach evolution around seaports at the scale of the African continent" 7 (7): 151-, 2019

15 Ndour, A., "Management strategies for coastal erosion problems in West Africa: analysis, issues, and constraints drawn from the examples of Senegal and Benin" 156 : 92-106, 2018

16 "Britannica"

17 Mensah, C., "Assessing the effects of climate change on sea level rise along the Gulf Of Guinea" 4 (4): 2017

18 Codjia, C. L., "Application de la télédétection à l’étude des changements urbains et des transformations du littoral àCotonou (Bénin). Télédétection des milieux urbains et périurbains" AUPELF-UREF 299-306, 1997

19 IPCC, "AR5Synthesis Report: Climate Change 2014" International Panel on Climate Change 2014

20 IPCC, "AR5Synthesis Report: Climate Change 2007" International Panel on Climate Change 2007