Physical Hydraulic Model Test for the Flow Pattern of Pool Passes Fishway

Fishway water velocity is the main factor to determine wether or not a fishway can work maximally and be passed through by fish. In some conditions, fishway flow velocity is beyond the fish swimming ability, so that they refuse to swim through the fishway. Fishway flow velocity can be set by adjusting the water level and flow director to control the flow distribution pattern. The present study performed a physical model test by using three discharge variations and three fishway variations with additional baffle as flow director. The flow velocity is measured using Acoustic Doppler Velocimeter (ADV). The parameter used in the present study were water level, velocity distribution pattern, and submerged orifice velocity.