Application research of river flow velocity and discharge calculations based on spatio-temporal image method
Flow data plays an important role in water disaster prevention,water resources management,water environment protection and water science research,etc.In the new era,traditional intrusive flow measurement methods have limitations and shortcomings under the requirements of fine and dynamic management of watershed.The non-intrusive flow measurement technology based on image recognition obviously provides a new idea to solve the above problems.In order to give full play to the advantages of image recognition technology in the field of hydrology measurement,and to provide a new solution for flow monitoring in China,this paper studies and establishes a complete non-contact image recognition flow measurement and calculation method.The method includes surface velocity calculation based on spatiotemporal image and river flow calculation based on index calibration method and surface velocity coefficient method.Finally,taking Chongyang hydrological station of Yangtze River Committee Hydrology Bureau as a demonstration station,the comparative tests are carried out to verify the feasibility and accuracy of the method.The results show that the non-contact image recognition current measurement method established in this paper is convenient,novel and of high precision,and has the value of popularization and application,so it can provide important technological support for the construction of modern hydrographic station.
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