Numerical Modeling of Flow in Fishways Embedded with Circular/Rectangular Obstructions

概要

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Two dimensional shallow water equations are solved by applying a Godunov-type numerical method to analyze the flows in fishways with obstructions of circular and rectangular shapes of equal area, embedded with regular and staggered patterns. Results show that obstructions embedded with a regular pattern creates shorter fish pathways and larger low velocity regions although flow is accompanied with a little higher velocity at the center of gaps. Water depth and its distribution pattern in a pool are almost the same when the obstructions with circular/rectangular shapes are embedded with a regular pattern. However, obstructions embedded with a staggered pattern create alternate shallower and deeper pools in fishways.
日本雨水資源化システム学会の論文