Features of the technical and software implementation of the method for determining small rivers flow velocity based on cross-correlation image analysis

The main goal of the work is to demonstrate the features of the technical and software implementation of the method for determining the water flow velocity in rivers and channels by recording and processing video images of the water surface, as well as to analyze the effectiveness of the method in comparison with standard measurements using a hydrometric turbine and the float method. A brief overview of the most commonly used methods for determining flow velocity is provided. The stages of software processing of the obtained video data and the methodology for determining the average flow velocity based on cross correlation analysis of images are considered. The results of the method’s testing are presented, confirming its effectiveness; the discrepancies with the results obtained using a certified hydrometric vane generally do not exceed 11 %. This method allows for the rapid acquisition of data on flow velocity in rivers and canals without the use of expensive equipment. A distinctive feature of the method is the ability to determine the flow velocity field across the entire cross section of the water body under study, which makes it possible to obtain more accurate data compared to standard measuring tools.

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