An Application of Godunov-Type Scheme to Flow in a Vertical Slot Fishway

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This paper deals with an application of a second order accurate Godunov-type numerical model of the two-dimensional shallow water equations discretized using finite volumes to the flow in a vertical slot fishway, which has vertical slots along the center of flume. Roe's scheme is used for the convection terms and a non-linear slope limiter is applied to prevent non-physical oscillations. Comparing the numerical results with the results of hydraulic model experiments, it is found that the numerical model well reproduces flow patterns and water depth distributions as a whole. However there are discrepancies between computed and measured water depths just at the downstream of slots, where the vertical acceleration is dominant. The numerical experiments further confirm that the velocity in the slot and the difference in water level between two adjacent pools are almost independent of the discharge.
日本雨水資源化システム学会の論文