ETD

Archivio digitale delle tesi discusse presso l'Università di Pisa

Tesi etd-04072016-173302


Tipo di tesi
Tesi di laurea magistrale
Autore
BOGGI, FRANCESCO
URN
etd-04072016-173302
Titolo
Study of the sea dynamic and coastal erosion through shallow water simulations
Dipartimento
INGEGNERIA CIVILE E INDUSTRIALE
Corso di studi
INGEGNERIA AEROSPAZIALE
Relatori
relatore Prof.ssa Salvetti, Maria Vittoria
relatore Dott. Beux, François
relatore Dott. Mariotti, Alessandro
Parole chiave
  • sediment transport
  • coastal erosion
  • shallow water
  • wave dynamics
Data inizio appello
26/04/2016
Consultabilità
Completa
Riassunto
In the present work, an in-house-developed shallow-water code have been used to evaluate the coastal erosion in the gulf of Cagliari.
The physical problem is modeled through the shallow-water equations coupled with the Exner equation closed by the the Meyer-Peter-Muller (MPM) model to describe the time evolution of the bed profile. A modified Roe scheme for non-conservative systems of equations is considered for space dis-cretization. Second-order accuracy in space is achieved through variable reconstruction. These schemes are used in the simulation of the considered problems together with explicit time advancing. Second-order accuracy in time is obtained through a backward differentiation formula associated with a defect-correction approach.
The in-house-developed code is first validated against literature data in order to assess its prediction capabilities in term of sediment transport and wet/dry interface treatment. Then, specific meteo-marine events are simulated to evaluate their effects on the coast.
The morpho-bathimetry and characteristic marine conditions of the region have been provided by “in-field” measurements of the University of Cagliari. The in-house developed code is used to simulate the sea region near the beach and it is coupled with the open-source large-scale shallow water code Delft3D in order to reproduce the dynamics of the waves in all the Cagliari gulf region.
The numerical simulations highlight that for the events taken into account a significative modification of the coast line is obtained with prevalent accumulation of sediment.
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