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The crestline approach for assessing the development of coastal flooding due to sea level rise


  • Rania A. Bekheet

    () (Alexandria University)

  • Mohamed El Raey

    (Alexandria University)

  • Alaa-El-Din Yassin

    (Alexandria University)


Abstract One of the most pressing issues in studying the impacts of sea level rise (SLR) triggered by climate change is understanding the development of the hazard of permanent coastal flooding. The issue persists because available approaches are based on the mapping of the inundated area where they explore the coastal flooding development across terrain elevations, that is—horizontally. In addition, they overlook the existing structures along or in the vicinity of the coastline, which have inherent hydraulic properties that may affect the development of such flooding. The purpose of this study is to develop a novel approach for assessing the development of permanent coastal flooding due to SLR at cross sections along the coastline, that is—vertically, in full consideration of underlying hydraulic properties of the existing coastline. An approach was developed using analogy of existing coastline to a contiguous weir. This approach was named crestline approach and was developed as a four step GIS-based approach that could be applied at any coastal zone. An example application on one of the top ranked cities in the world prone to the SLR threat has been provided to illustrate exactly how to apply the crestline approach. The novelty of this approach lies in its ability to accurately identify the specific locations where coastal flooding will initiate, in full consideration of existing natural/manmade coastal structures. This study is significant for the opportunities it provides to analysts and decision makers to better understand the development of permanent coastal flooding.

Suggested Citation

  • Rania A. Bekheet & Mohamed El Raey & Alaa-El-Din Yassin, 2017. "The crestline approach for assessing the development of coastal flooding due to sea level rise," Mitigation and Adaptation Strategies for Global Change, Springer, vol. 22(7), pages 1113-1130, October.
  • Handle: RePEc:spr:masfgc:v:22:y:2017:i:7:d:10.1007_s11027-016-9717-9
    DOI: 10.1007/s11027-016-9717-9

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    References listed on IDEAS

    1. Dasgupta, Susmita & Laplante, Benoit & Meisner, Craig & Wheeler, David & Jianping Yan, 2007. "The impact of sea level rise on developing countries : a comparative analysis," Policy Research Working Paper Series 4136, The World Bank.
    2. Detlef Vuuren & Jae Edmonds & Mikiko Kainuma & Keywan Riahi & Allison Thomson & Kathy Hibbard & George Hurtt & Tom Kram & Volker Krey & Jean-Francois Lamarque & Toshihiko Masui & Malte Meinshausen & N, 2011. "The representative concentration pathways: an overview," Climatic Change, Springer, vol. 109(1), pages 5-31, November.
    3. O.E. Frihy, 2003. "The Nile delta-Alexandria coast: vulnerability to sea-level rise, consequences and adaptation," Mitigation and Adaptation Strategies for Global Change, Springer, vol. 8(2), pages 115-138, June.
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