Fluorescence BRRDF Simulation Of Emulsified Oil Spill At Sea Surface Based On LIF

Emulsified oil spill is the main component of Marine environmental pollution.How to monitor it is a difficult problem.Laser induced fluorescence(LIF)is an active optical detection technology,the technique use the laser to irradiation the fluorescent substance in seawater,fluorescence is excited by the fluorescent substance.Obtiained the fluorescence information and analyze,the information of the content of fluorescent substances in seawater can be obtained.However,the current LIF technology is mostly applied to oil film monitoring,the studies of emulsified oil spill at sea surface is lesser.Therefore,in order to make LIF technology can better detect emulsified oil spill on the sea surface,in this paper,the simulation model of Bispectral Bidirectional Reflectance and Reradiation Distribution Function for the fluorescence of emulsified oil spills on the sea surface based on Lif is constructed.It is abbreviated to BRRDF in this article.Therefore,this paper constructs a model called fluorescent BRRDF simulation model of emulsified oil spill on the sea surface based on LIF and extracted the fluorescence characteristics.This paper focuscs on the following aspects.Firstly,brief introduction the optical properties of the ocean,because its inherent optical properties are determined by the medium itself,so we study the intrinsic optical properties of emulsified oil spill at sea.The intrinsic optical properties of oil-in-water and oil-in-water emulsified oil spills at different oil contents are calculated by using the theory of Mie scattering.And analyze the changes of its optical properties.This can provide parameters for the subsequent establishment fluorescence BRRDF simulation model of emulsified oil spill at sea.Secondly,establish the fluorescence BRRDF simulation of emulsified oil spill on the sea surface.To explore the relationship between BRRDF and the type of emulsified oil spill at sea surface and its concentration and thickness.The Monte Carlo method is used to simulate the motion of photons in the emulsified oil spill media on the sea surface.The BRRDF simulations are study for different types of emulsified oil spills and the same type of emulsified oil spills with different oil contents.Analyz the relationship between BRRDF simulation value and oil spill type.Finally,according to the simulation results of emulsified oil spill on the sea surface,the feature extraction of the fluorescence BRRDF simulation model was carried out.At the same type,the simulation results of emulsified oil spill on the sea surface,at the same concentration with different thickness and the same thickness with different concentration were extracted and analyzed.We can know fixed the thickness or concentration of emulsified oil spills,the maximum amount of oil overflow that can be detected by the fluorescence BRRDF model.