La. Civ. Code art. 504
Current with changes from the 2024 legislative session effective on or before 7/1/2024, from Acts 2,3, 6-535, and 580-647
When a navigable river or stream abandons its bed and opens a new one, the owners of the land on which the new bed is located shall take by way of indemnification the abandoned bed, each in proportion to the quantity of land that he lost.
If the river returns to the old bed, each shall take his former land.
La. C.C. § 504