Shoreline migration and beach-nearshore sand balance over the last 200 years in Haifa Bay (SE Mediterranean) |
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| Authors: | Dov Zviely Eliezer Kit Baruch Rosen Ehud Galili Micha Klein |
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| Institution: | (1) The Leon Recanati Institute for Maritime Studies, University of Haifa, Haifa, 31905, Israel;(2) Faculty of Engineering, Department of Fluid Mechanics and Heat Transfer, Tel-Aviv University, Ramat-Aviv, Tel-Aviv, 69978, Israel;(3) Israel Antiquities Authority, P.O. Box 180, Atlit, 30350, Israel;(4) Department of Geography and Environmental Studies, University of Haifa, Haifa, 31905, Israel |
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| Abstract: | Several researchers have investigated morphological changes on the south-eastern Mediterranean coast during the late Holocene.
However, very few of these studies include quantitative data covering the last 200 years. In this study, topographical maps,
nautical charts and aerial photographs are used to estimate the shoreline migrations and beach–nearshore sand balance over
the last 200 years in Haifa Bay, Israel, the northernmost final depositional sink of the Nile littoral cell. The findings
reflect two main periods. During the first period, between 1799 and 1928, human intervention along the bay’s coast was negligible,
a significant coastal expansion of ∼50 to 150 m (averages of 0.4–1.2 m/year) was measured, and sand accumulation was estimated
at ∼70,000 m3 annually in the beach–nearshore area. A dramatic change in the sedimentological pattern was observed during the second period,
between 1928 and 2006, following the completion of Haifa Port’s main breakwater (1929–1933). During this period, most of the
bay’s coast was in a steady state, with seasonal fluctuations of less than about ±20 m, and slight erosion of ∼7,000 m3 annually. These findings are consistent with previous studies which conclude that from approximately 4,000 years ago until
the construction of Haifa Port, sea level remained relatively stable, and a continuous accumulation of Nile-derived sand dried
up the Zevulun Plain and shifted the Haifa Bay shoreline westwards to its present location. This long-term trend ceased after
completion of the Haifa Port main breakwater. |
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