What is Batture?

Legal Definition
An elevation of the bed of a river under the surface of the water; but it is sometimes used to signify the same elevation when it has risen above the surface. 6 M. R. 19, 216. The term battures is applied, principally, to certain portions of the bed of the river Mississippi, which are left dry when the water is low, and are covered again, either in whole or in part by the annual swells. The word battures, in French, signifies shoals or shallows, where there is not water enough for a ship to float. They are otherwise called basses or brisans. Neuman's Marine Pocket Dict.; Dict. de Trevoux.
-- Bouviers Law Dictionary
Legal Definition
In Louisiana. A marine term used to denote a bottom of sand, stone or rock mixed together and rising towards the surface of the water; an elevation of the bed of a river under the surface of the water, since it is rising towards it; sometimes, however, used to denote the same elevation of the bank when it has risen above the surface of the water or is as high as the land on the outside of the bank. In this latter sense it is synonymous with "alluvion." It means, in common-law language, land formed by accretion. Morgan v. Livingston, 6 Mart. (O. S) (La.) Ill; Hollingsworth v. Chaffe, 33 La. Ann. 551; New Orleans v. Morris, 3 Woods. 117, Fed. Cas. No. 10,183; Leonard v. Baton Rouge, 39 La. Ann. 275, 4 South. 243.
-- Black's Law Dictionary
Legal Definition
A shoal; an alluvial deposit in the bed of a stream.
-- Ballentine's Law Dictionary