Universal aquatic vegetation radiation transmission model

Abstract

The invention relates to a universal aquatic vegetation radiation transmission model. Building of the model includes the following steps that a whole aquatic vegetation system is divided into a plurality of dielectric layers which are evenly mixed and consistent in horizontal optical properties; vegetation canopy structure parameters, observation geometry and other conditions, and reflectivity and transmittance of a single leaf are input into an SAIL model for calculation extinction and scattering coefficients of a vegetation canopy to radiation, wherein the reflectivity and the transmittance of the single leaf are obtained through calculation of an SPECT model; the water body component concentration is given, absorption and back scattering coefficients of a water body are calculated on the basis of a case 2 water body optical model, and extinction and scattering coefficients of the water body and the vegetation mixed dielectric layers are calculated; according to a Cox-Munk model, scattering matrixes of a wave surface to direct radiation and diffusion radiation are calculated; bidirectional reflectivity of the aquatic vegetation system is calculated according to an adding method. The universal aquatic vegetation radiation transmission model achieves precise description of a reflectance spectrum and directional reflection features of aquatic vegetation, and is the premise and basis of radiation and aquatic vegetation interaction mechanism researches and precise remote sensing inversion of water environment parameters.

Description

(1) Technical field [0001] The invention relates to a general radiation transfer model of aquatic vegetation, belongs to the field of optical remote sensing, and has great significance in the research and quantitative application of water color remote sensing technology. (2) Background technology [0002] Aquatic vegetation growing in natural shallow waters (lakes, rivers, wetlands, nearshore waters, etc.) can be divided into: emergent vegetation, floating vegetation and submerged vegetation. Compared with water bodies, aquatic vegetation has relatively high reflectance and obvious spectral reflection characteristics, so the existence of aquatic vegetation will have a significant impact on optical shallow water remote sensing signals. Therefore, a scientific understanding of the spectral reflection characteristics and bidirectional reflection characteristics of aquatic vegetation is of great significance for remote sensing monitoring of aquatic vegetation and inversion of wa...

AI Technical Summary

Problems solved by technology

This is mainly due to the fact that there are many factors affecting the spectral directionality of aquatic vegetation, and it is difficult to measure in situ on site. The fluctuation of water surface and the non-uniform distribution of aquatic vegetation can cause large errors, and it is difficult to measure accurately through experiments.

Images