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Rajaratnam, N., C. Katopodis and A. Mainali (1989). Pool-orifice and pool-orifice-weir fishways. Canadian Journal of Civil Engineering. 16:774-777.

This technical note presents a method of analyzing the flow in pool-orifice fishways by dividing it into vertical slot and submerged orifice flow regimes. For a pool-orifice-weir fishway, with flow through the orifice as well as over the weir, a method has been suggested for predicting the total flow rate in the fishway. Experimental observations are presented in support of these methods.

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