The scientific questions addressed by DELTARHONE are: (1) How to provide data to constrain the models used to compute the fluxes and transfer of suspended particulate matter, carbon and microplastics?; (2) What is the initial fate of suspended particles and carbon supplied by the river during flood events (ratio between deposition and transport in the river plume)?; (3) Can we estimate the fluxes associated (particles, carbon and microplastics) during winter storm events?; (4) What are the distribution and dynamics des microplastics and in the prodelta?; (5) What are the sedimentation rates of particles, carbon and microplastics in the prodelta?; (6) What is the influence of recycling in the water column and within surface sediments on the carbon fate in the prodelta ? These questions are addressed combining the use of sediment transport and biogeochemical models to field measurements and satellite observations, together with new field data recorded during dedicated field campaigns.
