Virtual plant canopy photosynthesis effective radiation distribution simulating method of multi-layer data structure

Abstract

The invention relates to a virtual plant canopy photosynthesis effective radiation distribution simulating method of a multi-layer data structure. The method includes the following steps of establishing a virtual plant model and a virtual plane scene high in fidelity and complexity, collecting plant canopy photosynthesis effective radiation intensity values through a related astronomical parameter method or a field measurement method, sequentially establishing the three-layer data structure with a virtual plane scene single-tree geometrical model, a scene and a terrain through a data structure starting method, establishing a direct solar radiation and sky scattering PAR ray vector plane, sequentially tracing all ray vectors on the ray plane through a Monte Carlo ray tracing algorithm and a turtle shell algorithm, traversing the three-layer data structure with the scene, the single tree and the terrain, judging whether rays intersect with triangular patches or not, counting the sky visible rates of all the triangular patches, and calculating direct solar radiation PAR and sky scattering PAR of all the triangular patches to obtain a virtual plane canopy PAR three-dimensional space distribution simulating result.

Description

technical field [0001] The invention relates to the fields of geology, agronomy, forestry, botany and the like, in particular to a method for simulating the distribution of photosynthetically active radiation in a virtual plant canopy with a multi-layer data structure. Background technique [0002] Photosynthetically active radiation (Photosynthetic Active Radiation, PAR) is the part of the solar radiation spectrum that can be absorbed by green plant chlorophyll and converted into material accumulation. Its radiation wavelength is between 380nm and 710nm, accounting for about 40% of the total solar energy. The PAR from the sun incident on the plant canopy can be divided into direct solar PAR, sky diffuse PAR and leaf multiple scattering PAR, among which direct solar and sky diffuse PAR are the main components of PAR in the canopy. Plant leaves have the characteristics of high absorption, low reflection and transmittance in the PAR band, so the leaves in the plant canopy have...

AI Technical Summary

Problems solved by technology

At present, there is no literature related to the use of multi-level data structures to accelerate the calculation of PAR simulation calculations in virtual vegetation scenes, especially for the simulation of 3D distribution of PAR in virtual vegetation canopies in complex terrain areas.

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