The teachings herein are directed to a wave forming apparatus including a bed form that may include a plurality of sections at different angles, including a base section adjacent to a wave forming channel, the base section having an exterior profile defining a first, non-abrupt angle to the direction of flow of water in the channel, and an upper section that forms an exterior profile defining a second, steeper angle to the direction of water flow. Also disclosed is a twistlock mechanism adapted to removably fasten a bed form to a water channel, and a method of use.