Research on Real-time Flow Observation and Calculation Based on ADCP System

To realize the real-time flow measurement of hydrological stations, improve the accuracy of flow measurement at stations and reduce the intensity of manual flow measurement, the ADCP flow online monitoring system was introduced in Lanxi Hydrological Station in November 2020. After long-term monitoring and calibration analysis of a large amount of data, the model of correlation between the average flow velocity measured by ADCP and the average flow velocity of Lanxi section was established, which ensured that the station personnel could accurately grasp the flow characteristics and control conditions of the section, accurately calculate hourly flow and various characteristic values, capture the flood process of the section, and cover all flood periods. At the same time, it further explained that the specific gradient and flow velocity of Lanxi section changed correspondingly at stations which were frequently regulated by power stations and greatly affected by water conservancy projects, which directly affected the relationship between flow velocity, water level and flow, resulting in backwater jacking.