1,720,971 research outputs found
Valutazione dello stato erosivo delle spiagge liguri: Applicazione di un Sistema Informativo Geografico.
No full textLast cycle regressive-transgressive deposits on the continental shelf between Albenga and Loano (western Liguria): a submarine sourcefor the beach nourishment
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The use of a GIS for analyse dune systems: the case of Platamona-Marritza (Northern Sardinia, Italy)
No full textLa ricerca delle sabbie sulla piattaforma continentale ligure: campagna di Geologia marina per la localizzazione dei depositi sedimentari idonei al ripascimento dei litorali.
No full textVariazioni storiche della linea di riva tra Portofino e punta mesco e valutazione delle opere di difesa costiera
No full textThe coastal dune field: the use of a GIS platform in the case study of Platamona-Marritza (Northern Sardinia, Italy).
No full textLate Quaternary deposits from the Ligurian continental shelf (NW Mediterranean): a response to problems of coastal erosion
No full textThe Ligurian continental shelf is a terrigenous platform characterized by variable extension and subsidence of the continental margin and thick accumulation of sediments originated by repeated sea-level oscillations. Its genesis and evolution occurred during the Plio-Quaternary, even if early erosive modelling in some sectors has been dated to the Late Miocene. The present morphology of the shelf is the result of transgressive–regressive Quaternary cycles. Using a high-resolution seismic grid of more than 1000 km, we have been able to define the seismostratigraphic characteristics of the Ligurian Sea shelf. On the basis of our studies, it has been possible to describe in detail the seismostratigraphy of the Late Quaternary and Holocene sediments that cover the shelf to various depths, in terms of sedimentary sources, for the purpose of distinguishing ‘relic’ deposits suitable for nourishing beaches undergoing erosion. From this detailed study of the evolution of the most superficial deposits, it is possible to distinguish between different sedimentary bodies deposited during a transgressive phase and located at a water depth ranging between 20 and 70 m; they are represented by relic sands cropping out at the sea bottom due to a relatively thin Holocene drape and could be explored for beach nourishment programmes
Valutazione dello stato di erosione dei litorali e stima del fabbisogno di sedimenti per il ripascimento delle spiagge liguri.
No full textThe port of Genoa - Voltri (Liguria Italy): A case of updrift erosion
No full textThe effects of port structures on 'downdrift' shoreline areas have been extensively studied and are widely known today. Their effects on 'updrift' areas are less well known. However, these morphosedimentological variations, although not comparable in intensity to the previous variations, can produce relatively important phenomena on the shoreline, especially in the case of a significant drift. In fact. they can modify the coastal exposure to the wave-wind climate and produce a variation in the drift and sedimentary budget in different areas; consequently, they call produce erosive and accumulation phenomena. This paper presents a study of the shoreline to the west of the poll structures of Genoa-Voltri that have altered the local sedimentary dynamics, causing disequilibrium to the nearby beach with an evident progradation in the eastern area of the shoreline and a significant regression in the central area
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