4.6 Article

The Role of Sea State to the Morphological Changes of Prasonisi Tombolo, Rhodes Island, Greece

Journal

WATER
Volume 14, Issue 13, Pages -

Publisher

MDPI
DOI: 10.3390/w14132016

Keywords

tombolo; salient; wind-wave events; swell events; sea bottom evolution

Funding

  1. Operational Programme Competitiveness, Entrepreneurship and Innovation (NSRF) [MIS 5045792]
  2. European Union (European Regional Development Fund)

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This study investigates the wave-induced morphodynamic processes that lead to the formation of tombolo in Prasonisi, Rhodes Island, using satellite image analysis and numerical modeling. A new method is developed to extract successive wave data with similar characteristics, which is utilized together with satellite image analysis to derive the most representative wave scenarios that affect the formation of tombolo. The study finds that offshore wave conditions, the location and width of the surf zone, the maximum value of the wave breaking index, and the initial bottom bathymetry play significant roles in the evolution of tombolo and salient formation.
Wave-induced morphodynamic processes that cause formation, preservation, and destruction of the Prasonisi tombolo in Rhodes Island are investigated, based on satellite image analysis and numerical modeling. A new method is developed for extracting wave events that consist of successive wave data of similar characteristics. The wave events refer either to wind seas or swell seas. This process combined with the satellite image analysis is then utilized for the derivation of the most representative wave scenarios that affect tombolo and salient formation. In particular, the main factors that play a significant role in tombolo and salient evolution are the offshore wave conditions, the location and width of the surf zone, the maximum value of the wave breaking index in the study area, and the initial bottom bathymetry before the study area is exposed to a new sea state. In general, the proposed method provides a realistic insight into tombolo morphodynamics and can be used to provide a cost-effective approach and a wave data-reduction technique for coastal engineering studies.

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