The riverbed terrain of the Shipai bend between the two dams of the Three Gorges and Gezhouba Water Conservancy Hub on the Yangtze River is complex,with significant changes in flow rate and a wide distribution of surface obstruction flow patterns,posing safety hazards to the navigation of ships.However,the existing problems of flow field measurement technology are limited measurement range,significant environmental impact,and insufficient real-time performance,which cannot meet the needs of complex channel surface flow field measurement.In response to the above issues,this article conducts research on real time twin method for surface flow fields.LSPIV technology combined with multi view cameras is used to construct a real-time twinning system for surface flow fields in sharp curved waterway environments.And on-site comparative tests are conducted in the curved water area of Shipai,obtaining twin data of the flow field in the surface water area.The results show that this method can accurately and real-time restore the actual water flow state on the surface of the waterway,and has a good agreement with the measurement values of the unmanned aerial vehicle radar speed measurement equipment,providing technical support for the safety of hub navigation.