Resistivity monitoring method and apparatus for sea floor erosion/deposition dynamic process

Abstract

The invention relates to a specific resistance monitoring device used in a seabed erosion-deposition dynamic process, which comprises a detecting sensing device, an automatic control recording device and an outer shell thereof, and is characterized in that a plurality of electrodes fixed on an outer wall of a PVC pipe in an equidistant manner are arranged on the detecting sensing device; in the PVC pipe, a lead penetrates through the wall of the PVC pipe and leads the electrodes into the automatic control recording device; a force bearing shaft passes through the outer shell of the automatic control recording device and an axle wire of the PVC pipe, is connected with a conical head on the bottom of the PVC pipe, and is fixed on the top of the outer shell of the automatic control recording device through a shim block and a nut in a sealing manner; and the automatic control recording device comprises an electrode switch control module, a data acquisition module, a microprocessor, a USB mass storage, a battery and a clock module. The real-time, long-term and continuous monitoring on the seabed erosion-deposition dynamic changing process can be realized; and the specific resistance monitoring device is especially suitable for the monitoring on the seabed erosion-deposition dynamic process in common oceanic conditions and extreme oceanic conditions.

Description

Technical field [0001] The invention belongs to the technical field of ocean measurement, and relates to a method and device for dynamically and cyclically measuring the resistivity values ​​of seawater and sediments in a certain range near the seabed interface to determine the seabed erosion process dynamic monitoring of changes in the seabed interface position. Background technique [0002] Seabed sediments will be eroded or siltated under the action of seawater. These two processes are dynamic and may occur in extreme sea conditions such as calm sea conditions and storms. As the elevation of the seabed interface position changes, it directly reflects the erosion or siltation of the seabed. At present, the most commonly used technologies and methods for monitoring seabed erosion and sedimentation are as follows: [0003] One is to use photoelectric sensor probe device. Multiple photosensitive elements distributed on the probe can convert sunlight into electrical signal output a...

AI Technical Summary

Problems solved by technology

When this method has a large amount of sand in the water, the reflected waves are chaotic, and it is difficult to judge the seabed elevation, and there will be a long cable exposed in the water.

Therefore, in the sea conditions that have the most severe impact on erosion, such as strong winds and waves, the current velocity is high and the sand content in the water is high. This technology cannot record the elevation change of the seabed during the period, and the line is easily damaged.

[0005] In summary, the current seabed erosion and deposition monitoring technology is difficult to achieve dynamic monitoring and recording of the erosion and deposition process, and is limited by sea conditions.

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