走航ADCP观测资料质量控制方法及应用

A Quality Control Procedure for Shipboard ADCP Data and Its Application

为完善目前走航ADCP观测资料质量控制尚未形成统一流程的问题,将走航ADCP观测资料质量控制归纳为船速获取、声速校正、偏角校正以及剖面数据处理四个主要步骤,并制定了一套较为系统的走航ADCP观测资料质量控制流程。以渤海辽东湾红沿河核电站周边海域船载走航ADCP观测为例,按照提出的流程进行走航ADCP观测资料的质量控制。通过对比原始观测数据,质量控制后的结果表明u分量流速剔除了23.56%的低可信度数据,而v分量流速剔除了25.96%的低可信度数据。10 m与15 m水深处的质量控制前后的流速-频数直方图表明,本文提出的流程能有效地降低观测随机性的影响。

Since there is no standard quality control procedure for shipboard ADCP observations, we established a systematic quality control method for shipboard ADCP data that includes four major steps: ship speed acquisition, sound speed calibration, misalignment angle correction, and profile data processing. Our quality control method is then applied to the shipboard ADCP observations obtained in the Liaodong Bay, and the results show that 23.56% of zonal velocity data and 25.96% of meridional velocity data are incredible and thus eliminated compared with the original ADCP observations. The velocity-frequency histograms at the depth of 10 m and 15 m indicate that our quality control procedure can effectively reduce the effects of random errors in ADCP data analysis.