alluvion

noun

1. (countable, uncountable)The increase in the area of land due to the deposition of sediment (alluvium) by a river.

   “It was Settled at that period, that alluvions must belong to the riparious owner, according to this natural maxim, that the profit belongs to him who is exposed to suffer the damage, with which riparious property is threatened, no more than any other.”

   “The purchaser of a riparious estate under the words "front to the levee," does not acquire the alluvion or batture, when there is land susceptible of separate ownership beyond the levee.”