Eight partners will take part in the GESA subproject: it aims to carry out a multidisciplinary study of the way sand deposits and sand collected by coastal infrastructure is managed as well as the recovery of sediment transports in river beds. This study will be carried out along various coastal sections of four European countries: 1) Spain, 2) Italy, 3) France and 4) Greece. These European coastal areas share the same problem: defence mechanisms (dams) placed in harbours act as barriers to longitudinal movement of sedimentary deposits when they intercept sand that is naturally moving along the coast. This effect is especially significant in the regions in which the littoral sedimentary drift seems to mainly flow in one direction, which then creates areas strongly affected by erosion which are no longer reached by sand masses. In order to improve sand deposit management, it is necessary to assess the volumetric size of sand reserves along the coast, the sedimentary processes that are responsible for the deposits and the average annual exchange rate between hydro-sedimentary cells. These volumes can be estimated by assessing thickness of sediments recorded via seismic surveys. Sedimentary cycle analysis has to be extended to the river system, reaching the river mouths from which longitudinal sand movements originate. The GESA subproject will take advantage of advanced coastal study techniques, such as: i) Numeric modelling to simulate wave motion, induced currents or entrainment which results from sediments from a well defined section. ii) Aerial photographs which will extend the study’s temporal scope, and iii) Physical models, representing the normal status of a section in a laboratory, or land analysis to define a case study and validate results obtained from modelling, which can then be used on a wider scale.