无人机搭载非接触式测深与测流系统在阿拉尔水文站的应用与精度分析OA

To verify the applicability and accuracy of a UAV equipped with non-contact instruments in complex river hydrological monitoring,a synchronous comparative test was conducted at the Alaer Hydrological Station on the upper reaches of the Tarim River.A UAV platform was employed to carry a non-contact bathymetric system and a radar-based velocity measurement system,with their performance compared against traditional methods using a sounding lead and a rotor-type current meter.The results indicated that the average absolute error between the non-contact bathymetric system and sounding lead measurements for water depth was 0.03 m,with an average relative error of 4.5％.The topographic map of the wetted cross-section showed over 90％consistency with the measured cross-sectional morphology.After applying a correction coefficient,the radar-based velocity measurement system exhibited an average absolute error of 0.01 m/s and an average relative error of 2.9％compared to the vertically averaged velocity measured by the rotor-type current meter.For discharge estimation based on the velocity-area method,the relative error between the flow rate measured by the UAV system and that obtained by traditional methods was 4.7％,meeting the accuracy requirements specified in river discharge measurement standards.The findings demonstrated that this approach can serve as an effective supplement and alternative to traditional survey methods,significantly improving operational efficiency by 6 to 10 times and providing reliable data support for refined hydrological analysis.