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Fig. 6 Waidhofen Power Station: ejector flow at the end of the ejector ramp (mixing zone) A striking drop in water level at the convergence point of the two water streams, where the ramp water mixes with the turbine flow from the draft tube is shown in Fig. 6. Fig. 7 Ejector ramp flow – Waidhofen Power Station The ejector flow, regulated at the ejector gate, is accelerated on the ejector ramp and displaces the tail race water body, creating a clearly visible roller wave (Fig. 7). 1369