#fluvial processes

• Silt up — To deposit alluvium, to cover a piece of land or a riverbed with layers of silt, sand, and gravel brought by waters; to undergo a process of silting or sedimentary accumulation. In hydrotechnics, it describes the action by which a river modifies the dynamic relief of an area by dropping transported materials at points where current velocity decreases.
• Silting up — The act of depositing alluvium and its result; the natural or technically induced process through which a watercourse deposits sediments, leading to the rising of the riverbed or the covering of land with silt; silting up. As a plural form, it denotes the alluvial attributes or structures characterizing multiple floodplains or hydrographic basins.