Implications of 3D Forest Stand Reconstruction Methods for Radiative Transfer Modeling: A Case Study in the Temperate Deciduous Forest

This study investigated the implications of different assumptions 3D forest stand reconstructions for accuracy and efficiency radiative transfer (RT) modeling based on two highly detailed representations: 3D-explicit voxel-based. The discrete anisotropic (DART) model was used RT simulations. voxel-based scenes were as structural inputs DART model, respectively. Using simulation benchmark, evaluated under multiple conditions. results showed that simulations: with voxel sizes 0.1, 1, 10 m in blue, green, red, near-infrared wavebands, normalized deviations simulated directional reflectance exceeded 5% tolerance limit 89% viewing directions; 0.2, m, spectral albedo 90.5% wavelengths; wavebands fraction absorbed photosynthetically active radiation, 65.3% spatial resolutions. major causes differences versus simulations were: (a) difference between light interaction spatially explicit objects turbid medium, (b) contours models. However, substantially more computationally efficient than large (≥1 m) coarse resolutions m).