the rate of sediment accumulation. The rate of sediment accumulation in water basins depends on a number of factors, such as the quantity and quality of sediment being deposited, distance from sediment source, intensity of biological processes (e.g. phytoplankton blooms, bioturbation), seasonal phenomena (e.g. phytoplankton blooms, autumn and winter storm surges), geological sea bed composition, depth of sea bed and hydrological and hydrodynamic regimes. Moreover, the amount of sediment transported from land to sea may also be affected by the intensity of weathering, erosion and degradation.