Spatial variability mapping of crop residue using hyperion (EO-1) hyperspectral data
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Date
2015
Authors
Bannari, Abderrazak
Staenz, Karl
Champagne, Catherine
Khurshi, K. Shahid
Journal Title
Journal ISSN
Volume Title
Publisher
MDPI AG
Abstract
Soil management practices that maintain crop residue cover and reduce tillage
improve soil structure, increase organic matter content in the soil, positively influence water
infiltration, evaporation and soil temperature, and play an important role in fixing CO2 in the
soil. Consequently, good residue management practices on agricultural land have many
positive impacts on soil quality, crop production quality and decrease the rate of soil erosion.
Several studies have been undertaken to develop and test methods to derive information on
crop residue cover and soil tillage using empirical and semi-empirical methods in
combination with remote sensing data. However, these methods are generally not sufficiently
rigorous and accurate for characterizing the spatial variability of crop residue cover in
agricultural fields. The goal of this research is to investigate the potential of hyperspectral
Hyperion (Earth Observing-1, EO-1) data and constrained linear spectral mixture analysis
(CLSMA) for percent crop residue cover estimation and mapping. Hyperion data were
acquired together with ground-reference measurements for validation purposes at the
beginning of the agricultural season (prior to spring crop planting) in Saskatchewan
(Canada). At this time, only bare soil and crop residue were present with no crop cover development. In order to extract the crop residue fraction, the images were preprocessed, and
then unmixed considering the entire spectral range (427 nm–2355 nm) and the pure spectra
(endmember). The results showed that the correlation between ground-reference
measurements and extracted fractions from the Hyperion data using CLMSA showed that the
model was overall a very good predictor for crop residue percent cover (index of agreement
(D) of 0.94, coefficient of determination (R2) of 0.73 and root mean square error (RMSE) of
8.7%) and soil percent cover (D of 0.91, R2 of 0.68 and RMSE of 10.3%). This performance
of Hyperion is mainly due to the spectral band characteristics, especially the availability of
contiguous narrow bands in the short-wave infrared (SWIR) region, which is sensitive to the
residue (lignin and cellulose absorption features).
Description
Sherpa Romeo green journal; open access
Keywords
Crop residue , Remote sensing , Hyperspectral , Hyperion , Agricultural land , Unmixing , Crop residue management , Crop residues
Citation
Bannari, A., Staenz, K., Champagne, C., & Khurshid, K. S. (2015). Spatial variability mapping of crop residue using hyperion (EO-1) hyperspectral data. Remote sensing, 7, 8107-8127. doi:10.3390/rs70608107