A multistage penetrating in-situ device and method to observe sand waves on the seabed based on resistivity probe

摘要

#$%^&*AU2019202090A120200716.pdf#####ABSTRACT A multistage penetrating in-situ observation device to observe sand waves on the seabed comprises a supporting structure, a multistage penetrating mechanism, a resistivity probe (4) with ring electrodes (19) and supporting observation instruments. The multistage penetrating system is triggered by characteristics of different stages of sand wave movement to penetrate the seabed with the probe. The penetrated area is observed to extract the elevation profile where the resistivity changes suddenly and to analyze the changes of sandy seabed with time. The method includes inversion of the elevation changes of sand waves on the seabed by resistivity. The invention provides for in-situ and real-time observation of sand wave movement on the seabed, and a new method to penetrate small and medium-sized development areas of sand waves on the seabed. The equipment is simple, easy to operate, and in-situ and real-time observation is applicable to a wide range of waters. Figure 1Drawings 13 14 12 3 -- - --------i Figure1I 103 Fiur/