In this graduation thesis a section of the river Vuka, at the area of meandar near Laslovo, which begins on the route of a kilometer 38+380 and ends at the route of a kilometer 36+567, has been processed by hydraulic calculation and modeling. The input has been taken from the State Hydrometeorological Service (DMHZ) from hydrological station Beketinci for the period of 21 years ( 2000-2022), with the exception of 2009 and 2017. Selected hydrological station is the closest upstream station from Laslovo section. There is no hydrological station in the area of Laslovo. Based on the data taken over a period of 21 years, a hydraulic calculation of the flow and water level was made in Microsoft Office Excel according to several theoretical and empirical distribution functions: Log Pearson III, Normal distribution, Čegodaj method and Weibull method. Cross sections for meander section were used in .dwg format given by Croatian waters, while other cross sections, that belong to upstream and downstream sections, were created according to default schemes for specified sections of the Vuka river with known elevations of embakment heights and depths of the riverbed. The results of the hydrological calculations by method Log Pearson III were used in computer program HEC-RAS. The resulting flow and water level values for return periods of 1, 2, 5, 10, 25, 50 and 100 years were entered. Three models were made. One model presents the situation before the regulatory work and the other two models present the situation after the regulatory work, which includes the construction of canal and overflow structures (partition barriers). The heights of the partition barriers are determined on the basis of a ten years return period for mean annual water levels. Simulations of the water level for these return period were obtained, on the basis of which the results of the flow characteristics are compared.