变点分析理论在高密度电阻率探杆观测海床界面中的应用

Application of Change Point Theory in identifying water-seabed interface based on high-density resistivity probe

基于团队自主研发的高密度电阻率探杆,将变点分析理论中的局部比较法,引入到高密度电阻率探杆观测数据分析处理中,以实现海床界面位置的自动判别,并应用该套装置与方法在辽东湾东部某海域进行了海底床界面动态变化的原位实时监测。通过将电阻率的判定结果与目前应用普遍的声学方法同步记录的结果进行对比,分析发现:电阻率探杆测量结果与声学侵蚀仪记录结果具有良好的一致性与同步性,局部比较法能够较为理想地从高密度电阻率探杆的观测数据中获取海床界面的动态变化过程。

This paper applied Change Point Theory into identifying seabed interface based on high density resistivity probe.An in-situ measurement of the seabed interface dynamic changes was also conducted in eastern Liaodong Bay using this probe and method. After the detailed comparison of the data recorded by resistivity probe and acoustical method which is widely used for seabed interface identification, it was found that results of the two instruments show quite a good consistency and synchronicity. Using high density resistivity probe along with Local Comparison Method which belongs to Change Point Theory could accurately identify the interface and deduce the dynamic change process of eabed interface.