The Nile delta-Alexandria coast: vulnerability to sea-level rise, consequences and adaptation

  • O.E. Frihy
Article

Abstract

Like many delta systems, the coastal zoneof the Nile delta has been designated as avulnerable zone to a rising sea level as aconsequence of expected climate changescombined with geological and human factors.In view of the understanding of thesefactors, a degree of vulnerabilityanalysis has been carried out to betterlocate which sectors need to be assessedand adapted to possible sea level rise(SLR) for the Nile delta-Alexandria region of Egypt.Results reveal that not all of the coastalzones of the Nile delta are vulnerable toaccelerated sea-level rise at the samelevel. Based on multiple criteria the Niledelta-Alexandria coast can be categorizedinto vulnerable (30%), invulnerable (55%)and artificially protected coastalstretches (15%). These criteria include:local subsidence or uplifting, relativesea-level rise (RSLR), land topography,width of lagoon barriers, beach-face slope,high-elevated features such as dunes andridges, eroding and accreting coastlinesand protection works.Moreover, this study evaluates thelong-term relative sea-level rise andsubsidence rates along the Nile delta andAlexandria coasts. Statistical analysis oflong-term tide gauge data recorded atAlexandria, Burullus and Port Said yieldsvalues of 1.6, 1.0 and 2.2 mm/yr,respectively. These values of relativesea-level rise and long-term subsidencerate obtained from age-dated sediment coresections are inconsistent: long-termsubsidence appears to be larger (maximum of7 mm/ yr). This discrepancy might beexplained if the subsidence is episodic,and occurs rather abruptly during majorearthquakes that occur every few hundredyears associated with fault trend lines.Rising sea levels could have significantlongterm impacts on the Nile delta,including the distribution of ground watersalinity and erosion of the narrow andlow-lying barriers of the Burullus andManzala lagoons. Adaptive measures alongthe study area particularly those relatedto coastal protective structures are alsoevaluated.

beach erosion climate change littoral cells protective works subsidence 

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References

  1. Al Abiary, M.G.: 1999, ‘Anomalous distributions of seismic intensities in the Nile Delta Egypt’, in Z.M. Zaghloul and M.M. Elgamal (eds.), Deltas-Modern and Ancient, in proceedings of Mansoura University, First International Symposium on the Deltas, Egypt, pp. 209–217.Google Scholar
  2. Ambraseys, N.N.: 1961, ‘On the seismicity southwest Asia, data from a XV Century from Arabic manuscript’, Revue pour l'Etudes des Calmites 37, 18–30.Google Scholar
  3. Broadus, J.J., Milliman, S., Edwards, D. and Aubrey, Gable: 1986, ‘Rising sea level and damming of rivers: Possible effects in Egypt and Bangladesh’, in J. Titus (ed.), Effect of Changes in Stratospheric Ozone and Global Climate 4, 165–189.Google Scholar
  4. Bruun, P.: 1962, ‘Sea level rise as a cause of shore erosion’, Proc. Am. Soc. Civ. Eng., J. Water Harbors Div. 88, 117–130.Google Scholar
  5. Bruun, P.: 1988, ‘The Bruun rule of erosion by sea-level rise: a discussion on large-scale two-and three-dimensional usages’, J. Coastal Res. 4, 627–648.Google Scholar
  6. Butzer, K.W.: 1960, ‘On the Pleistocene shorelines of Arabs' Gulf, Egypt’, J. Geol. 68, 626–637.Google Scholar
  7. Carter, T.R., Parry, M.L., Harasawa, H. and Nishioka, S.: 1994, IPCC Technical Guidelines for Assessing Climate Change Impacts and Adaptation, WGII of IPCC. WMO/UNEP, Geneva.Google Scholar
  8. Chen, Z., Warne, A.G. and Stanley, D.J.: 1992, ‘Late Quaternary evolution of the northwest Nile delta between Rosetta and Alexandria, Egypt’, J. Coastal Res. 8, 527–561.Google Scholar
  9. Curry, J.R.: 1965, ‘Late Quaternary history, continental shelves of the United States’, in H.E. Write and D.J. Frey (eds.), The Quaternary of the United States, Princeton, Princeton Univ. Press, pp. 723–735.Google Scholar
  10. Delft Hydraulics/CRI.: 1991, ‘Implication of relative sea-level rise on the development of the lower Nile delta, Egypt’, Pilot study for a quantitative approach, Final Report, p. 300.Google Scholar
  11. El Fishawi, N.M. and Fanos, A.M.: 1989, ‘Prediction of sea level rise by 2100, Nile delta coast’, INQUA, Commission on Quaternary Shorelines, Newsletter 11, 43–47.Google Scholar
  12. El Raey, M., Dewidar, Kh. and El Hattab, M.: 1999, ‘Adaptation to the impact of sea level rise in Egypt’, J. Climate Res. 12, 117–128.Google Scholar
  13. El Raey, M., Nasr, S., Frihy, O., Desouk, S. and Dowidar, Kh.: 1995, ‘Potential impacts of accelerated sea-level rise on Alexandria Governorate, Egypt’, J. Coastal Research 51, 190–204.Google Scholar
  14. El Sayed, M.Kh.: 1988, ‘Sea level rise in Alexandria during the late Holocene: Archaeological evidences’, Rapp. Comm. Int. mer. Medit., p. 31.Google Scholar
  15. El Sayed, M.Kh.: 1991, ‘Implications of climatic changes for coastal areas along the Nile Delta’, Envir. Prof. U.S.A. 13, 59–65.Google Scholar
  16. El Sharkawy, M.: 1992, Earthquakes, After Shocks, Causes, Hazards, History, Prediction, and Mitigation, Cairo, Al Ahram Center for Translation and Publishing, p. 115.Google Scholar
  17. Emery, K.O., Aubrey, D.G. and Goldsmith, V.: 1988, ‘Coastal neo-tectonics of the Mediterranean from tide-gauge records’, J. Marine Geol. 81, 41–52.Google Scholar
  18. Frihy, O.E.: 1992a, ‘Beach response to sea level rise along the Nile delta coast of Egypt’, in P.L. Woodworth (ed.), Sea Level Changes: Determination and Effects Geophysical Monograph 69, American Geophysical Union, IUGG 2, 81–85.Google Scholar
  19. Frihy, O.E.: 1992b, ‘Sea-level rise and shoreline retreat of the Nile delta promontories, Egypt’, J. Natural Hazards 5, 65–81.Google Scholar
  20. Frihy, O.E. and Lotfy, M.F.: 1997, ‘Shoreline changes and beach-sand sorting along the northern Sinai coast of Egypt’, Geo-Marine Lett. 17, 140–146.Google Scholar
  21. Frihy, O.E., Fanos, M.A., Khafagy, A.A. and Komar, P.D.: 1991, ‘Nearshore sediment transport patterns along the Nile Delta Egypt’, J. Coastal Eng., Netherlands 15, 409–429.Google Scholar
  22. Frihy, O.E., Debes, E. and El Sayed, W.: 2003a, ‘Processes reshaping the Nile delta promontories of Egypt: pre-and post protection’, J. Geomorph. (in press).Google Scholar
  23. Frihy, O.E., Iskander, M.M., Badr, A.E. and Lotfy, M.F.: 2003b, ‘Effect of shoreline and bedrock irregularity on the morphodynamics of Alexandria coast littoral cell, Egypt’, (under publication).Google Scholar
  24. Gaamea, O.M.: 2000, Behavior of the Transition Zone in the Nile Delta Aquifer under Different Pumping Schemes, Ph.D. Thesis Dissertation, Cairo University, p. 180.Google Scholar
  25. Goodfriend, G.A. and Stanley, J.S.: 1999, ‘Rapid strand-plain accretion in the northeastern Nile Delta in the 9th century A.D. and the demise of the port of Pelusium’, J. Geology 27, 147–150.Google Scholar
  26. Gornitz, V., Lebedeff, S. and Hansen, J.: 1982, ‘Global sea level trend in the past century’, Science 215, 1611–1614.Google Scholar
  27. Gornitz, V.: 1995, ‘Sea-level rise: a review of recent past and near-future trends’, Earth Surface Proc. Landforms 20, 7–20.Google Scholar
  28. Gvirtzman, G. and Buchbinder, B.: 1977, The desiccation events in basins around theMediterranean, in Biju-Duval L. and Montaclert, L. (eds.), Structural History of the Mediterranean Basin, Paris, Technip, pp. 411–420.Google Scholar
  29. Hamed, A.A. and EL Gindy, A.A.: 1988, ‘Storm surge generation by winter cyclone at Alexandria, Egypt’, Int. Hydrogr. Rev. Monaco 36, 129–139.Google Scholar
  30. Hefny, K. and Shata, A.: 1995, Strategy for Planning and Management of Groundwater in the Nile Valley and Delta in Egypt, Strategy Research Program, Working paper, p. 1–31.Google Scholar
  31. Hicks, S.D.: 1972, ‘On the classification and trends of long period sea level series’, Shore and Beach 40, 20–23.Google Scholar
  32. Ibrahim, E.M. and Marzouk, I.: 1979, Seismotecectonic Study of Egypt, Helwan Institute of Astronomy and Geophysics, Bulletin, p 199.Google Scholar
  33. Inman, D.L. and Jenkins, S.A.: 1984, The Nile Littoral Cell and Man's Impact on the Coastal Zone of the Southeastern Mediterranean, La Jolla, Scripps Institution of Oceanography, Reference Series 84–31, University of California, La Jolla, p. 43.Google Scholar
  34. IPCC: 1994, ‘Intergovernmental Panel on Climatic Change in the eastern Mediterranean basin, Geological evolution of the Mediterranean Basin’, in D.J. Stanley and F.C. Wezel (eds.), New York, Spring-Verlag, pp. 249–269.Google Scholar
  35. Kebeesy, R.M.: 1990, ‘Seismicity’, in R. Said (ed.), Geology of Egypt, Rotterdam, Balkema, pp. 51–59.Google Scholar
  36. Komar, P.O.: 1983, Handbook of Coastal Processes and Erosion, Boca Raton, Fla, CRC Press, p. 305.Google Scholar
  37. Mamoun, M. and Ibrahim, E.M.: 1978, Tectonic Activity in Egypt as indicated by Earthquakes, Helwan Institute off Astronomy and Geophysics, Bulletin, p. 170.Google Scholar
  38. Milliman, J.D. and Emery, K.O.: 1968, ‘Sea levels during the past 35,000 years’, Science 162, 1121–23.Google Scholar
  39. Milliman, J.D., Broadus, J.M. and Gable, F.: 1989, ‘Environmental and economic implications of rising sea level and subsidence deltas: The Nile and Bengal examples’, AMBIO 18, 340–345.Google Scholar
  40. Nafaa, M.G., Fanos, A.M. and Khafagy, A.A.: 1991, ‘Characteristics of waves off the Mediterranean coast of Egypt’, J. Coast. Res. 7, 665–676.Google Scholar
  41. Neev, D.: 1977, ‘The Pelusium line, a major transcontinental shear’, Tectonophysics 38, T1–T8.Google Scholar
  42. Neev, D., Greenfield, L. and Hall, JK.: 1985, ‘Slice tectonic in the eastern Mediterranean basin’, in D.J. Stanley and F.C. Wezel (eds.), Geological Evolution of the Mediterranean Basin, New York, Springer Verlag, pp. 249–269.Google Scholar
  43. Neev, D., Hall, J.K. and Saul, J.M.: 1982, ‘The Pelusium megashear system across Africa and associated lineaments swarms’, J. Geophys. Res. 87, 1015–1030.Google Scholar
  44. Nicholls, R.J. and Klein, R.J.: 2000, Some Thoughts on Impacts and Adaptation to Climate Change in Coastal Zone, in proceedings of SURVAS Expert Workshop on African Vulnerability and Adaptation to Impacts of Accelerated Sea-Level Rise (ASLR), Cairo, pp. 5–13.Google Scholar
  45. Nicholls, R.J. and Leatherman, S.P.: 1996, ‘Adapting to sea-level rise: Relative sea level trends to 2100 for the USA’, J. Coast. Manag. 24, 301–324.Google Scholar
  46. Poirier, J.P. and Taher, M.A.: 1980, ‘Historical seismicity in the Near and Middle East, North Africa, and Spain from Arabic documents (VIIth - XVIIth century)’, Seismol. Soc. Amer. 70, 2185–2201.Google Scholar
  47. Said, R.: 1981, The Geological Evolution of the River Nile, New York, Springer Verlag, p. 151.Google Scholar
  48. Savage, W.: 1984, Evaluation of Regional Seismicity, Wood Clyde Consultants, Internal report to Aswan High Dam Authority.Google Scholar
  49. Sestini, G.: 1989, ‘Nile Delta: a review of depositional environments and geological history’, in K.G. Whateley and K.T. Pikering (eds.), Deltas Sites and Traps for Fossil Fuels, London, Blackwell Scientific Publications, Geological Society Special Publication 41, pp. 99–127.Google Scholar
  50. Sestini, G.: 1990, ‘Impacts of global climate change in the Mediterranean region: Responses and policy options’, in J.G. Titus (ed.), Changing Climate and The Coast, Volume 2: Western Africa, the Americas, the Mediterranean Basin, and the Rest of Europe, pp. 115–125.Google Scholar
  51. Sestini, G.: 1992, ‘Implications of climate change for the Nile delta. In: Climate Change and the Mediterranean’, in L. Jeftic, J.D. Milliman and G. Sestini (eds.), Environmental and Societal Impacts of Climate and Sea-level Rise in the Mediterranean Sea, London, Edward Arnold, pp. 533–601.Google Scholar
  52. Sharaf El Din, S.H., Khafagy, A.M., Fanos, A.M. and Ibrahim, A.M.: 1989, Extreme Sea Level Values on the Egyptian Mediterranean Coast for the next 50 Years, Cairo, International Seminar on Climatic Fluctuations and Water Management, p. 15.Google Scholar
  53. Shata, A. and El Fayoumi, I.: 1970, ‘Remarks on the hydrogeology of the Nile delta’, in Hydrology of Deltas, Paris, IASH/ UNESCO, Bucharest Symp., I., UNESCO.Google Scholar
  54. Sneh, A. and Weissbrod, T.: 1973, ‘Nile delta: the defunct Pelusiac branch Identified’, Science 180, 59–61.Google Scholar
  55. Stanley, D.J.: 1988, ‘Subsidence in the northeastern Nile delta: rapid rates, possible causes, and consequences’, Science 240, 497–500.Google Scholar
  56. Stanley, D.J.: 1997, ‘Mediterranean deltas: subsidence as a major control of relative sea-level rise’, Bull. Inst. Oceanogr., Monaco 18, 35–62.Google Scholar
  57. Stanley, D.J.: 1990,‘Recent subsidence and northeast tilting of the Nile delta, Egypt’, J. Marine Geol. 94, 147–154.Google Scholar
  58. Stanley, D.J. and Warne, A.G.: 1993, ‘Nile delta: recent geological evolution and human impacts’, Science 260, 628–634.Google Scholar
  59. Stanley, D.J. and Warne, A.G.: 1994, ‘Worldwide initiation of Holocene marine deltas by deceleration of sea-level’, Science 265, 228–231.Google Scholar
  60. Toussoun O.: 1934, ‘Les ruines sous-marines de la Baie d‘Abuquir’, Bull. Soc. R. Arch, Alexandria 29, 342–352.Google Scholar
  61. UNDP/UNESCO: 1978, Coastal Protection Studies, Final Technical Report, Paris, 1, p. 155.Google Scholar
  62. Warne, A.G. and Stanley, D.G.: 1993, ‘Late Quaternary evolution of the northwest Nile delta and adjacent coast in the Alexandria region, Egypt’, J. Coast. Res. 1, 26–64.Google Scholar
  63. Wigley, T.M. and Raper, S.C.: 1992, ‘Implications for climate and sea level of revised IPCC emission scenarios’, Nature 357, 293–300.Google Scholar
  64. World Bank: 1990, ‘Arab Republic of Egypt: country economic memorandum, economic readjustment with growth’, World Bank Report 2, p. 72.Google Scholar
  65. Zaghloul, Z.A., Elgamal, M.M., El Araby, H. and Abdel Wahab, W.: 1999, ‘Evidences of neotectonics and ground motions in the northern Nile Delta’, in Z.M. Zaghloul’ and M.M. Elgamal (eds.), Deltas-Modern and Ancient, Egypt, proceedings of Mansoura University, First International Symposium on the Deltas, pp. 285–314.Google Scholar

Copyright information

© Kluwer Academic Publishers 2003

Authors and Affiliations

  • O.E. Frihy
    • 1
  1. 1.Coastal Research InstituteAlexandria

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