675 km of high resolution seismic profiles and more than 50 sediment samples (grabs and gravity-cores) were collected at water depth ranging from 20 m to 100 m, offshore Cilento peninsula (southern Italy), in order to assess sand resources potential in this area belonging to the eastern Tyrrhenian margin. The Cilento peninsula is located in Campania region that is one of the most popular vacation spots for tourists in Italy. Its scenic coastline is dominated mainly by cliffs, but also important beach systems and small bays are present, where evidences of constant coastal retreat have occurred in the latest years, threatening commercial developments. The high economic value of these beach systems justifies high investments from local authority to choose soft protection measures searching marine sand for beach nourishment. The oceanographic survey has been carried out thanks to a research agreement between the local authority "Autorità di Bacino Sinistra Sele" and CoNISMa (National Interuniversity Consortium for Marine Sciences); the cruise took place during April 2004 and the large amount of data collected allowed us to study in detail the development of late Pleistocene/Holocene sedimentary deposits formed during the latest cycles of high-frequency sea-level variations. In fact it is well know that in microtidal coast the main targets for sand research are relict deposits formed on the shelf when sea level was lower than present. In the investigated area we found two main locations where the chirp data showed sand bodies on the continental shelf. Unfortunately, the volume of such deposits is not large enough to ensure the nourishment of the whole costal area affected by erosion. In any case the methodology employed showed to be successfully suitable to assess the presence of beach nourishment resources, in particular to recognise in fine detail sand bodies (in terms of their 3D geometry and of the thickness of overlying mud) and to reenact specific geomorphologic/sedimentary conditions occurred on the continental shelf.
Geophysical investigation on the continental shelf of Cilento Peninsula (Southern Italy) to preliminary asses beach renourishment resources / Savini, A.; Pennetta, Micla; Corselli, C.. - 7th International Conference on the Mediterranean Coastal Environment, MEDCOAST 2005; Kusadasi; Turkey; 25 October 2005 through 29 October 2005; Code 105144:(2005), pp. 973-984. (Intervento presentato al convegno MEDCOAST 05 tenutosi a Kusadasi, Turkey, nel 25-29/10/05).
Geophysical investigation on the continental shelf of Cilento Peninsula (Southern Italy) to preliminary asses beach renourishment resources.
PENNETTA, MICLA;
2005
Abstract
675 km of high resolution seismic profiles and more than 50 sediment samples (grabs and gravity-cores) were collected at water depth ranging from 20 m to 100 m, offshore Cilento peninsula (southern Italy), in order to assess sand resources potential in this area belonging to the eastern Tyrrhenian margin. The Cilento peninsula is located in Campania region that is one of the most popular vacation spots for tourists in Italy. Its scenic coastline is dominated mainly by cliffs, but also important beach systems and small bays are present, where evidences of constant coastal retreat have occurred in the latest years, threatening commercial developments. The high economic value of these beach systems justifies high investments from local authority to choose soft protection measures searching marine sand for beach nourishment. The oceanographic survey has been carried out thanks to a research agreement between the local authority "Autorità di Bacino Sinistra Sele" and CoNISMa (National Interuniversity Consortium for Marine Sciences); the cruise took place during April 2004 and the large amount of data collected allowed us to study in detail the development of late Pleistocene/Holocene sedimentary deposits formed during the latest cycles of high-frequency sea-level variations. In fact it is well know that in microtidal coast the main targets for sand research are relict deposits formed on the shelf when sea level was lower than present. In the investigated area we found two main locations where the chirp data showed sand bodies on the continental shelf. Unfortunately, the volume of such deposits is not large enough to ensure the nourishment of the whole costal area affected by erosion. In any case the methodology employed showed to be successfully suitable to assess the presence of beach nourishment resources, in particular to recognise in fine detail sand bodies (in terms of their 3D geometry and of the thickness of overlying mud) and to reenact specific geomorphologic/sedimentary conditions occurred on the continental shelf.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
