Within the Master's thesis, we discuss the topic of modelling the transport of bedload sediments. We present the theoretical bases, which includes determination of sediment inflow from the hinterland, as well as the characteristics of sediment transport within the watercourse bed. Determination of sediment inflow wise, we describe the methods for determination of potential erosion of sediments in the hinterland. In the case of sediment transport within the riverbed, we introduce the basics of the start of bed load transport, the characteristics of different types of sediment transport as well as different methods of determining the transport capacity and the amount of sediment transport in the watercourse. In the thesis, the bed load transport is discussed on the concrete example of the Sava Dolinka river, which represents a typical gravel bed river. We focused on the section between the confluence with Pišnica (Kranjska Gora) and the dam Hrušica. A one-dimensional hydraulic model was established for the aforementioned section, additionally adapted for sediment transport modelling. It was used to analyse the dynamics of the bedload transport in this section. In addition, we evaluate the influence of watercourse qualities (water amount, roughness and grain size distribution), as well as hydraulic model settings (choice of transport function, etc.) on bed load transport modelling results. In the end, based on the established impact of individual parameters, we provide guidelines that highlight the priorities that should be given the most attention in bed load transport modelling in order to ensure the low uncertainty of the modelling results. The advantages and disadvantages of the applied modelling methods, established during the preparation of the Master's thesis, are presented. Based on this, their usefulness in various cases was assessed.
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