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Single bands leaf reflectance prediction based on fuel moisture content for forestry applications

Authors :
Andrés Hernán Fuentes Castillo
Tito Arevalo-Ramirez
Fernando Auat Cheein
Pedro Sebastián Reszka Cabello
Source :
Biosystems Engineering. 202:79-95
Publication Year :
2021
Publisher :
Elsevier BV, 2021.

Abstract

Vegetation indices can be used to perform quantitative and qualitative assessment of vegetation cover. These indices exploit the reflectance features of leaves to predict their biophysical properties. In general, there are different vegetation indices capable of describing the same biophysical parameter. For instance, vegetation water content can be inferred from at least sixteen vegetation indices, where each one uses the reflectance of leaves in different spectral bands. Therefore, if the leaf moisture content, a vegetation index and the reflectance at the wavelengths to compute the vegetation index are known, then the reflectance in other spectral bands can be computed with a bounded error. The current work proposes a method to predict, by a machine learning regressor, the leaf reflectance (spectral signature) at specific spectral bands using the information of leaf moisture content and a single vegetation index of two tree species (Pinus radiata, and Eucalyptus globulus), which constitute 97.5% of the Valparaiso forests in Chile. Results suggest that the most suitable vegetation index to predict the spectral signature is the Leaf Water Index, which using a Kernel Ridge Regressor achieved the best prediction results, with a RMSE lower than 0.022, and a average R2 greater than 0.95 for Pinus radiata and 0.81 for Eucalyptus globulus, respectively.

Details

ISSN :
15375110
Volume :
202
Database :
OpenAIRE
Journal :
Biosystems Engineering
Accession number :
edsair.doi...........c3c5362b1a12f6ddb5d2915f893b0c73
Full Text :
https://doi.org/10.1016/j.biosystemseng.2020.12.003