This thesis addresses the challenges faced by watercourse managers when planning new measures and maintaining existing ones to protect the population and private property from high water levels, while also taking into account all other interested parties who use watercourses as well as measures to protect aquatic life. We focus on the Kožbanjšček watercourse in the Goriška brda region, part of whose basin is protected by Natura 2000 and natural heritage, so it is necessary to approach the search for solutions with particular caution. It’s a watercourse that has a distinctly torrential character in its upper course, while in its lower course the channel is regulated and the slope of the channel is much smaller, which consequently means that sediments can accumulate in the lower course. We also take a closer look at the damaged check dam, for which a hydraulic model and a sediment transport model were created to determine the impact of torrential dams on the watercourse as a whole and on the life within it. We conclude that check dams are necessary in Kožbanjšček watercourse and that it is necessary to proceed with the restoration of the damaged dam as soon as possible, but on the other hand also establish a plan of measures to maintain sufficient flow in the watercourse channel and ensuring the best possible ecological conditions for aquatic life.
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