The aim of presented research was evaluation of hydrodynamic conditions changes on the regulated sector of the Smolnik stream. The measurements were carried out in 2008 and 2009. Each series of this study included measurements of the longitudinal profile, cross-sections of channel and the bed material granulation. Results of these works were used to calculate the hydrodynamic quantities as mean velocity, stream power, shear stresses and bedload transport (by the Bagnold equation). It was possible to ascertain that the control works came to expectation and bank erosion was stopped. Locally an intensification of bed erosion had place. An analysis of the longitudinal profiles and course of grain-size composition of the bed material changes proved, that 2 years after control works realization tendency to return to early hydraulic conditions was appeared.
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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. ...
