Research and application of key techniques for identification of mainstream line of the yellow river mainstream

In order to effectively identify the location of the mainstream line of the Yellow River, that is, to determine the position of the maximum flow velocity in each cross section of the river, this study took the reach of the Yellow River from Licheng to Tianqiao in Jinan City, Shandong Province as the research area, and used non-contact visual flow measurement technology to measure the flow velocity distribution of the river cross section globally. Based on the PIV algorithm and PTV algorithm, the system architecture including visual streaming image acquisition terminal, 4G mobile network transmission link, central station server and data platform was adopted to obtain the mainstream line coordinate information of 7 monitoring sections by placing monitoring cameras at monitoring points. The results show that: by fitting the mainstream line, the technical method of visual measurement of the mainstream line in this study is reliable.