The main characteristic of a coastal system is its variability. Many factors are involved in the evolution of the shoreline, which can depend on the weather, on geology, and on the presence or absence of river mouths. They can also depend on the urbanization of the coasts or of the interior areas. In order to prevent coastal erosion, it is necessary to clearly understand the interaction of so many factors. In this regard both geological and historical aspects, experimental and theoretical models have to be considered in order to analyze the extreme variability of the system. This paper is divided into three parts. The first is concerned with the historical variation of the Calabria shoreline, evaluated through cartographic analysis. All data are provided by the Calabria Basin Authority and the analysis is made with GIS software. The first part ends with the identification of the areas characterized by coastal erosion. The second part is concerned with the evaluation of the causes of the erosion and the identification of the best type of intervention. The last part is concerned with the latest approaches to coastal dynamic, in particular Barbaro et al.
To define and predict all forces exerted by sea storms on structures is necessary to give support to coastal and offshore engineering. In this paper the horizontal force on offshore gravity platforms and on breakwaters is analyzed. Two cases study in two different locations are proposed, the first one concerns Italian coasts (Ortona), the second one is in the USA (Alaska). The results will be compared. The purpose of this paper is to compare recent methods for calculating force on structures with the well-known Morison’s equation and the Goda’s model. Wave climate was studied using the ISPRA (Istituto Superiore per la Protezione e la Ricerca Ambientale) and NDBC (National Data Buoy Center) measurements.
ABSTRACT:A better understanding and prediction of the dynamic processes that govern the coastal zone is the topic of the current paper; in particular, a deep investigation of the coastal processes that affect the shoreline dynamic and flood inundation risk is carried out at the Annunziata river mouth area (Italy). The Annunziata River is situated in the Northern part of Reggio Calabria city; it is, at the same time, a source of danger and an important environmental and hydrological resource for Reggio Calabria, since on the right side there is the city port and on the left side there is the public beach. The protection and management of coastal areas should be supported by a deep knowledge of the interaction between water motion and seabed topography, which affects the natural response of coastal systems to changes in external conditions and to human interferences. This work tries to analyze the coastal morphology through the use of some recent models based on spectral theory.
Reliability of offshore platforms is an important issue in the prevention of environmental disasters. In this paper, the variation of the horizontal force exerted on an offshore gravity platform is analyzed to achieve a deep comprehension of a storm scenario. Considering the wave motion as a potential motion, the quasi-determinism theory is applied to obtain the kinematic characteristics of a storm. The evolution of force against time is analyzed through the Morison's equation, diffraction theory, and a simplified method. Moreover, two case studies are examined, one in the Ortona region of the Italian coast and the other in the Gulf of Alaska, USA.
Abstract. The urban development in the last century was characterized by a depopulation of the mountains and a concentration of the population in urban areas, most of them are located near the coast. This factor increased significantly the problems and risks connected to coastal erosion. Thus, it implied a stricter monitoring activity in order to protect the coast and the population, as well. This paper discusses the historical variation of the shoreline in Reggio Calabria.
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