A method for remote sensing and identification of seabed in marine pastures based on acoustic data

Abstract

The present invention relates to a seabed telemetry and recognition method based on acoustic data, comprising the following steps: step a. forming a side-scan sonar acoustic image of the seabed of the marine ranch; step b. forming a multi-beam acoustic image of the seabed of the marine ranch; Step c. Observe the characteristics of side-scan sonar acoustic images and multi-beam acoustic images, identify artificial reefs and set up typical seabed sample collection stations, collect and record seabed types; step d. Construct seabed types and acoustic image features Mapping relationship table; step e. checking and evaluating the mapping relationship table constructed in step d; step f. drawing a spatial distribution map of seabed types of marine pastures. The present invention can overcome the limitations of traditional survey methods in marine pastures, solve the problem of seabed identification and classification in highly heterogeneous benthic habitats, and provide research for marine pasture benthic ecosystems, reef siltation and settlement, and oyster reef restoration. reliable data.

Description

technical field [0001] The invention belongs to the technical field of marine pasture habitat monitoring, and relates to a seabed telemetry and identification method based on acoustic data. Background technique [0002] As a new driving force for the transformation of China's traditional fishery, marine ranching has played a major role in solving outstanding problems such as marine habitat fragmentation, seawater eutrophication and fishery resource decline, and has developed rapidly. Artificial reefs are the carrier of marine ranch construction and an important part of marine ranch habitat restoration and construction. The release of artificial reefs has slowed down the speed and intensity of water flow, improved the nutrient supply capacity of the water body, and provided a good place for aquatic organisms to live and reproduce, thereby improving the yield and quality of fishery resources, increasing biodiversity, and improving the quality of fishery resources. The marine ...

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Problems solved by technology

[0003] However, with the massive release of artificial fish reefs, the seabed of marine pastures has transformed into a highly heterogeneous benthic habitat of reef nature, which limits the traditional survey methods such as fixed-point sampling and local trawling in marine pastures: 1) Fixed-point sampling can provide detailed information on local small-area seabeds, but in highly heterogeneous marine pastures, fixed-point sampling is insufficiently representative, and is not suitable for obtaining large-scale continuous information through interpolation and extrapolation; 2) seabed Trawl ecological surveys cannot be carried out normally in marine pastures with dense reefs; 3) Attached shellfish tend to gather and grow around artificial reefs, and traditional survey methods cannot accurately reflect their massive and dense distribution characteristics

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