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Remote Sensing Plant Stress Using Combined Fluorescence and Reflectance Measurements for Early Detection of Defoliants within the Battlefield Environment

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Final rept. 25 Mar 2006-24 Jul 2010

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Leaf fluorescence spectral characteristics were fused with reflectance hyperspectral data to remotely sense vegetationterrain conditions. Field measurements were conducted at the Virginia Coast Reserve, NSF, long-term ecological research site and at Ft. A.P. Hill. Laboratory experiments and field measurements incorporated relevant battlefield contaminants and natural environmental stresses. Goals were to 1 link leaf fluorescence and reflectance patterns and plant physiological responses with different kinds and degrees of environmental stress, 2 predict the stress agent and degree of stress using leaf fluorescence and reflectance characteristics, 3 extend laboratory results to field situations to link field measurements of leaf fluorescence and reflectance to natural environmental stress, 4 use plant physiological measurements in conjunction with leaf fluorescence and reflectance data to sort and identify potential stress agents in the field, and 5 link landscape level hyperspectral measurements to spatial variations in leaf fluorescence and reflectance in order to map environmental quality. In year four, added objectives were 1 determine if exposure to trinitrotoluene TNT contaminated soils and associated changes in plant physiological parameters can be remotely sensed, 2 identify highly responsive species to serve as contamination indicators, and 3 link landscape level hyperspectral measurements to experimental results to remotely identify TNT contaminated soils.

Subject Categories:

  • Biology
  • Miscellaneous Detection and Detectors
  • Ammunition and Explosives
  • Solid Wastes and Pollution and Control

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