Wave forming apparatus and method

A wave forming apparatus comprising:

• a channel for containing a flow of water, the channel having an inlet end connected to a water supply, a base, and spaced side walls, a weir in the base at the inlet end of the channel, and at least one bed form in the channel downstream of the weir;
• the bed form having a leading end and a trailing end, an upwardly inclined upstream face extending downstream of the leading end, an upper portion, and a downwardly inclined downstream face extending from the upper portion to the trailing end, the weir and bed form each extending outwardly to the side walls to define a primary water flow path from the inlet over the weir and bed form;
• a secondary flow passageway provided in the channel, the secondary flow passageway having a first end communicating with the primary water flow at a location adjacent the trailing end of the bed form, and a second end communicating with the primary water flow at a location upstream of the first end;
• the trailing end of the bed form being spaced above the base of the channel to provide a vertical drop-off at the trailing end of the bed form, the trailing end being at a predetermined first height above the base of the channel;
• and
• wherein there are at least two spaced bed forms in the channel and the upper portion of the second bed form is at a predetermined second height above the base of the channel, and the trailing end and upper portion together define a predetermined tail elevation factor (TEF) comprising a ratio of the first height to the second height.