A spectral index for estimating soil salinity in the Yellow River Delta region of China using EO-1 Hyperion data

Pedosphere
By: , and 

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Abstract

Soil salinization is one of the most common land degradation processes. In this study, spectral measurements of saline soil samples collected from the Yellow River Delta region of China were conducted in laboratory and hyperspectral data were acquired from an EO-1 Hyperion sensor to quantitatively map soil salinity in the region. A soil salinity spectral index (SSI) was constructed from continuum-removed reflectance (CR-reflectance) at 2 052 and 2 203 nm, to analyze the spectral absorption features of the salt-affected soils. There existed a strong correlation (r =0.91) between the SSI and soil salt content (SSC). Then, a model for estimation of SSC with SSI was established using univariate regression and validation of the model yielded a root mean square error (RMSE) of 0.986 and an R2 of 0.873. The model was applied to a Hyperion reflectance image on a pixel-by-pixel basis and the resulting quantitative salinity map was validated successfully with RMSE = 1.921 and R2 =0.627. These suggested that the satellite hyperspectral data had the potential for predicting SSC in a large area.

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Additional publication details

Publication type Article
Publication Subtype Journal Article
Title A spectral index for estimating soil salinity in the Yellow River Delta region of China using EO-1 Hyperion data
Series title Pedosphere
DOI 10.1016/S1002-0160(10)60027-6
Volume 27
Issue 3
Year Published 2010
Language English
Publisher Elsevier
Contributing office(s) Earth Resources Observation and Science (EROS) Center
Description 11 p.
First page 378
Last page 388
Country China
Other Geospatial Yellow River