With the existence of several types of measurement technologies and their increasing availability, approaches to measuring various phenomena in the living environment are also changing. Knowing the situation at the confluence, both on watercourses (riverbeds) and on many facilities and water infrastructure (fish paths) is of great importance for users and planners of works in this environment. At the confluence of two free-surface currents with higher Reynolds and Froud numbers, quasi-stationary standing waves appear, the flow dynamics of which are very pronounced. In the past, these properties have been measured with tactile or pressure sensors, but they have limited temporal and spatial resolution. In this master's thesis, we determined the height of such a stream with the help of photogrammetry. At a measuring station with two perpendicular currents, we recorded a quasi-standing wave with two high-speed cameras, and with the help of images we made a 3D model of the wave after their processing and determined its height. We found that the results were not accurate enough to determine the wave height or a more detailed analysis of the topographic structure, and that more accurate results would require a larger number of cameras to contribute to more images from several different angles.
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