Analysis method of oil spill weathering time based on reflectance spectrum, and application

Abstract

The invention discloses an analysis method of oil spill weathering time based on a reflectance spectrum, and application. The method analyzes and inverts the weathering time of an oil spill film basedon differences in reflectance spectrum data caused by changes in physicochemical properties of the oil spill film at different weathering times, and respectively establishes a measurement model of the weathering times of the oil spill film from a reflectance characteristic peak and an overall correlation analysis method of the measured reflectance spectrum and the data in a reflectance spectrum database, which improves the ability of anti-environmental interference both from the microscopic characteristics of the reflectance spectrum and the overall macroscopic correlation, and realizes the inversion and measurement of the weathering time of the oil spill film. While determining the oil spill weathering time, the analysis method provided by the invention determines the oil type based on the characteristics of the reflectance spectrum of the oil spill film, can carry out the inversion of the weathering time of the oil spill film in a targeted manner, has stronger pertinence and improves the accuracy of the weathering time inversion.

Description

technical field [0001] The invention belongs to the technical field of oil film detection and analysis on the water surface, and relates to an analysis method and application of oil spill weathering time based on reflectance spectrum. Background technique [0002] The occurrence of oil spill accidents will cause great damage to the marine ecological environment. The oil film leaked to the sea will be affected by wind, waves, light and other conditions, and the physical and chemical properties of the oil film will vary and change over time. Obtaining the accurate weathering time of the oil slick on the sea is of great significance for inferring the occurrence time of the oil spill, oil type identification, traceability and disposal. Conventional analysis and detection methods mainly include: isotope analysis, thermal infrared analysis and three-dimensional fluorescence method. The detection accuracy of isotope analysis method is high, but it requires complex sampling and sam...

AI Technical Summary

Problems solved by technology

The detection accuracy of isotope analysis method is high, but it requires complex sampling and sample processing process, and requires large precision instruments for analysis in the laboratory, which is not suitable for real-time analysis in the field

The thermal infrared analysis method judges the weathering time of the oil film according to the difference in the thermal radiation of the oil film, but it is easily affected by the surrounding environment, and the detection error is large

The three-dimensional fluorescence method inverts the weathering time of oil film based on the difference of laser fluorescence spectral characteristics, but requires a high-power laser as the excitation source, and is interfered by oil species, oil film thickness and background light

At present, the application of optical remote sensing in the detection of marine oil spills is relatively common, mainly to solve the problem of identification and distribution of marine oil spill targets. There are relatively few studies on the spectral analysis of the weathering time of oil spills at sea, and there is a lack of oil spills with different weathering times. Spectral Data and a Systematic Method for Inverting Oil Film Weathering Time

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