The present invention provides a slot die that includes a flow passageway that includes a transverse flow-providing manifold, a flow metering section that provides a transverse flow metering gap, and an exit channel that includes an exit orifice. The electric motor includes a stator having a coil therein, a rotor which rotates by applying current to the stator, and an annular motor casing containing the stator and the rotor. The ribs may further define transverse recesses in the step portion to enhance traction and aesthetics. The canal, the extensions and both types of water wheels are also adjustable in nature to maximize the amount of power obtainable from any given body of water.