Summary:

The paper presents the influence of river training works, carried on the part of the Słomka stream, on hydrodynamic conditions. The measurements carried out in 2004 and 2005 included following parameters: surveys of cross-section of the channel and the granulometric composition of bed material. Results of these work were used to calculate the hydrodynamic condition as shear stress, stream power, unit stream power, mean velocity and finally bedload intensity transport (by Bag-nold's formula). Then the comparison and analysis calculated parameters were performed. In sections A1, A3 and A5 the increase of considering parameters and intensity of lateral erosion after regulation were observed. In the other sections these values remained at a comparable level (section A4) or decreased (section A2). In cross-section no. 2 and no. 9 the percentage contents of fine grains increased in comparison with measurement results made before regulation. The characteristic diameter d50% in these sections considerably decreased by 1.8 cm and 2.8 cm respectively.