The paper presents the verification of sediment transport formulas present in the HEC-RAS framework using flume data. The study includes Ackers-White, Laursen, and Meyer-Peter-Müller functions. The analysis consists of three parts. In the first part functions were used with their default parameter values, established by their authors for a specific set of geometric and hydraulic properties. Later, functions parameters were calculated using empirical equations. The third part comprises Monte

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... o sampling technique in the scope of choosing the parameters set, that lead to the best model fit. The subject of the comparison was local scour volume and medium local scour depth. Scour hole was formed laboratory flume with partially sandy bed, preceded by solid bottom, as a result of energy gradient increment due to bed roughness variability.