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In-situ measurement of Mediterranean nearshore hydrodynamics at high temporal and spatial resolution. FEST and CALAMAR experiments

Certain Raphael

LEGEM (University of Perpignan) and GEOSCIENCES-M (University Montpellier II), in collaboration with CEREGE and LSEET, have planned to deploy a large set of instruments dedicated to the measurement of hydrodynamics in the nearshore zone in three different contexts.
FEST1 will take place along the lido of Leucate in january/february 2007. This site is characterized by crescentic bars and a high sediment budget by local erosion near human infrastructures.
CALAMAR 10 will take place during the autumn 2007 in the lido of Sète that was previously instrumented during the PNEC program (Certain et al, JMS, 2005). The shoreface is characterized by two linear sand bars and a mild slope.
CALAMAR 7 will take place in the Espiguette site, in the eastern part of the Gulf of Aigues-Mortes in february/march 2007. The site is characterized by two sand bars. A westward longshore drift controls a strong beach accretion and the formation of sand pits.
These campaigns are funded by several national programs (LEFE-IDAO, LITEAU, ANR COPTER and ANR VULSACO) and the European project NAUSICAA (Interreg IIIC).
Most equipments come from the GLADYS platform (www.gladys-littoral.org), including six ADCP Teledyne RD Instruments, 4 ADV Nortek, 1 wave gauge Seabird, and a new kind of wave gauges net with VHF signal transmission termed Easy Wave.
The objectives are: 1) to provide new sets of highly accurate data dedicated to a better understanding of the hydrodynamics within the microtidal nearshore zone, 2) to characterize this hydrodynamic forcing to understand the morphodynamics observed under particular erosion tendency, 3) to improve the protocols used for the deployment of apparatuses at sea, 4) to initiate a comparison of hydrodynamics in various microtidal contexts, 5) to provide new data to validate numerical models dedicated to nearshore Hydrodynamics.
The results of the campaign CALAMAR 10 will be compared to that of PNEC program.
We provide detailed informations relative to morphodynamics of the sites, regional wave/current forcings, instruments and protocols used, and anticipated results for these campaigns.