Spectral Absorption Features as Indicators of Water Status in Quercus agrifolia Leaves
Digital Object Identifier (DOI)
A total of 139 reflectance spectra (between 350 and 2500 nm) from coast live oak ( Quercus agrifolia ) leaves were measured in the laboratory with a spectrometer FieldSpec®Pro FR. Correlation analysis was conducted between absorption features, three-band ratio indices derived from the spectra and corresponding relative water content (RWC, %) of oak leaves. The experimental results indicate that there exist linear relationships between the RWC of oak leaves and absorption feature parameters: wavelength position (WAVE), absorption feature depth (DEP), width (WID) and the multiplication of DEP and WID (AREA) at the 975 nm, 1200 nm and 1750 nm positions and two three-band ratio indices: RATIO 975 and RATIO 1200, derived at 975 nm and 1200 nm. AREA has a higher and more stable correlation with RWC compared to other features. It is worthy of noting that the two three-band ratio indices, RATIO 975 and RATIO 1200, may have potential application in assessing water status in vegetation.
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Citation / Publisher Attribution
International Journal of Remote Sensing, v. 24, issue 9, p. 1799-1810
Scholar Commons Citation
Pu, Ruiliang; Ge, S.; Kelly, N. M.; and Gong, Peng, "Spectral Absorption Features as Indicators of Water Status in Quercus agrifolia Leaves" (2003). School of Geosciences Faculty and Staff Publications. 396.