alluvion

1 gradual formation of new land, by recession of the sea or deposit of sediment

2 the rising of a body of water and its overflowing onto normally dry land; "plains fertilized by annual inundations" [syn: flood, inundation, deluge]

3 clay or silt or gravel carried by rushing streams and deposited where the stream slows down [syn: alluvial sediment, alluvial deposit, alluvium]

Alluvion a legal term which describes the increase in the area of land due to sediment (alluvium) which is deposited by a river. This changes the size of a piece of land (a process called accession) and thus its value over time.