Results the investigation of length of submerged hydraulic jump are presented. Experiments were conducted on model taired construction with the outflow under the closure and with bottom stilling basins. Schema of investigated model and hydraulic parameters are typical for low head structures existing in the field. Measured length of hydraulic jump was compared with calculated according to different formulas. Relationships between nondimensional length of hydraulic jump λ0=L0/h1 with hydraulic parameters of flow q, v, Fr1 are calculated and compared with results of experiments.
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