Abstract: The improved revetment system is created using a plurality of substantially identical blocks which comprise a body having at least one channel therein leading to a slot and at least one arm extending outwardly of the body and terminating in a locking ear. The ear engages in a slot of an adjacent block and is of less depth than the slot, with the arm being of a length at least equal to and preferably greater than that of the channel, the slot including a removable spacer tab therein which abuts a terminal edge of the ear to keep the blocks spaced apart and an area of the block defined by the arm and ear having an arcuately downwardly sloped top surface with a terminal edge of the ear defining a lowermost position along the arcuate surface.