The study presents results velocity distributions obtained from the mathematical model SSIIM (Simulation of Sediment movements In water Intakes with Multiblock). Velocity calculated for the geometry of the measured local scour in 2007, (number 4, km 479 +225) located below the Jeziorsko reservoir. Model used was verified on the basis of their research field [Hämmerling 2011]. In this paper the calculation of velocity distributions made to flow from the multi-year average. Shows a graphical analysis of the characteristic velocity (average, near-bottom, maximum) in selected verticals hydrometric, cross sections (isotach) and longitudinal profiles. Specified to the universality of the software used, which can be successfully used for precisely analysis of the phenomenon of formation of the local scour below of sill.