Seabed sand wave long-term observation device and observation method applied to internal wave development area

Abstract

The invention relates to the field of seabed observation, in particular to a seabed sand wave long-term observation device and observation method applied to an internal wave development area. The support mechanism is in the shape of a balance, including a gravity anchor, a hexagonal rod, a ring-shaped instrument control cabin and a support rod. The gravity anchor is located at the bottom of the entire device. The gravity anchor is connected to the ring-shaped instrument control cabin above it through several hexagonal rods. The internal wave energy The power generating mechanism is set in the ring-shaped instrument control cabin. Two support rods are symmetrically fixed on the outside of the ring-shaped instrument control cabin. One of the support rods is connected to the multi-functional observation rod through the mechanical grip ring at its end, and the other support rod is connected to the multi-functional observation rod through its end. The mechanical grabbing ring of the instrument is connected with the sandy sediment sampling rod, and the top of the ring-shaped instrument control cabin is connected with the submersible buoy at the seawater boundary level through a Kevlar cable. It makes full use of the energy of internal ocean waves to realize long-term in-situ observation of seabed sand waves. The observation results are accurate and reliable, and the observation cost is low. It also realizes the collection and recovery of seabed sand wave soil samples.

Description

technical field [0001] The invention relates to the field of seabed observation, in particular to a seabed sand wave long-term observation device and observation method applied to an internal wave development area. Background technique [0002] my country's South China Sea area has complex geological conditions and significant seawater density stratification, which is a natural frequent occurrence area of ​​solitary waves in the ocean. Internal waves in this sea area not only appear in the form of solitary waves, but also in the form of internal tidal waves. The maximum amplitude observed so far can reach 240m, which contains huge energy. When it propagates at the interface of seawater density stratification, it will cause a large amount of vertical movement of water bodies and sediments. This process will often form landforms such as submarine sand waves on the seabed. Because of this, there are a large number of oceanic inner slopes in the northern part of the South my cou...

AI Technical Summary

Problems solved by technology

[0004] However, due to the high penetration intensity of the sandy seabed, the sampling column in the existing gravity sampling device is difficult to penetrate, so it is difficult to complete the sampling work by gravity sampling; and the box sampler and the clam sampler cannot collect the inside of the seabed When taking samples from the surface of the seabed, due to the effect of sand and gravel, it is difficult to completely close, and sand leakage often occurs. At present, there is no sampling device that can effectively obtain the profile information of the sediment inside the sandy seabed, and the above-mentioned patent does not solve the problem. This problem also leads to the lack of data support for sediment buoyant density, particle size, porosity and other properties in actual observations, which leads to the inversion of sand wave by the change of overlying sediment weight or sediment resistivity. The error is large when the elevation changes

[0005] In addition, due to the slow migration rate and long cycle of seabed sand waves, the bottom observation platform needs to observe such phenomena for several months or even years, which consumes a huge amount of electric energy, which is also a problem The construction of submarine observation platforms has been a problem for many years, and the above-mentioned patents have failed to propose a solution to this problem

Images