Paper presented results of investigation of formation local scour on the model of dam. Investigations were conducted on model with over&#-1278;ow under closure, bottom of water basins and washing-out area in scale 1:55. Hydraulic parameters according to Froude’a criterion were modeling. As eroded material on model sorted sand was used with d₅₀= 1,1 mm. Purpose of investigation were recognition variability dimension of scour during of discharge for different flow condition. Investigations showed influence depth of down stream on depth of scour, influence intensity of turbulence of stream on eroded process.

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