#aluvion

• Alluvium — A secondary, regional, or archaic form of the noun 'aluviune'; a sedimentary mass consisting of silt, sand, gravel, and organic debris transported and deposited by running waters in floodplains, deltas, or at river mouths. In certain old agricultural documents, the term describes new land formed by fluvial accumulation at the edge of a property.
• 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.
• Alluvial — Coming from alluvium, composed or formed by the gradual deposition of silt, sand, gravel, and organic debris transported by running waters; characteristic of alluvium. In a geomorphological and structural sense, it defines floodplains, deltas, or low land strips resulting from a long process of sedimentation and dynamic fluvial accumulation.
• 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.