La. Civ. Code art. 503
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 river or stream, whether navigable or not, opens a new channel and surrounds riparian land making it an island, the ownership of that land is not affected.
La. C.C. § 503