Abstract
The South-west Black Sea Coast is facing severe erosion problems that threaten both the population and the immediate eastside properties. Some locations, such as the Karaburun region, are especially vulnerable. In an attempt to reverse the present erosional trend, a coastal defense scheme involving a groin system was introduced in a phased manner. In the present work, the shoreline changes under the influence of a groin system of a sandy beach in Karaburun, Turkey, are studied by using a numerical simulation model (LITPACK). The work is motivated by the considerable erosion and siltation problems caused a sediment deposition near and inside the harbor entrance which prevented the boat traffic and caused a vital problem for the harbor operations. The study’s scope is two-fold: to help in understanding the dynamics of the beach based on results of the field work and to study the responses of this beach by numerical simulation, utilizing the topographic and sediment field data and measured wave data. The validation and verification of the numerical model was performed by RTK-GPS measurements and satellite images.
Highlights
The coastal zone is a physically dynamic and ecologically sensitive environment which is subject to a variety of human-induced pressures and natural events resulting in significant coastal erosion
We focused on a numerical model that is used for shoreline evolution in one dimension with the emphasis on the response of the beach topography to coastal structures, such as breakwaters, jetties and groins
Numerical Models The numerical model used in the current work is the LITPACK package, which is an integrated modeling system for LITtoral Processes and Coastline Kinetics developed by the Danish Hydraulic Institute (DHI, 2016a)
Summary
The coastal zone is a physically dynamic and ecologically sensitive environment which is subject to a variety of human-induced pressures and natural events resulting in significant coastal erosion. It is an important environment to be monitored and managed effectively for sustainable use For different intentions, such as protection of the shoreline against erosion, implementation of navigation channels, construction of harbors and human activities have changed the beach morphology at many locations around the world. A number of numerical models have been developed through the years for simulating shoreline change and beach morphology evolution. Long-term observations of shoreline changes, measurements of sea-bottom topography and longterm analysis of wave, wind and sediment characteristics were performed. ENVIRONMENTAL CONDITIONS AT THE SITE To determine the LST rates and shoreline evolution in this region, long-term observations of shoreline changes, sea-bottom topography, sediment properties, wind, wave and current measurement were performed. The maximum accretion was around 37 meters whereas the maximum erosion was 21.8 m
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