Google: vegetation spectral hydrocarbons
Spectral characteristics of wheat associated
with hydrocarbon microseepages
Author: H. Yang
DOI: 10.1080/014311699213226
Publication Frequency: 24 issues per year
Published in:
International Journal of Remote Sensing, Volume 20, Issue 4 March 1999 ,
pages 807 - 813
Subjects: Environmental Sciences; GIS, Remote Sensing & Cartography; Methods &
Techniques: Remote Sensing; Methods & Techniques: Remote Sensing;
Formats available: PDF (English)
Previously published as: Remote Sensing Reviews (0275-7257)
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Abstract
Spectra of wheat measured in the field in an oil-bearing area north of Changyi, south of the
Yellow River delta in eastern China, were analysed to study the relations between spectral
characteristics and hydrocarbon microseepage. Along two transects over known petroleum
reservoirs, ethane gas contents measured in soil show high values above the oil-water contacts
and faults. Delta carbonate contents also showed high values at these contacts. Both features are
indicative of hydrocarbon microseepage. The red-edge positions of wheat spectra were
calculated and found to be positioned at 744.43nm in areas of microseepage and 738.26nm in
areas with no microseepage; a 7nm shift to longer wavelength (red shift). Furthermore, a
regression analysis of the red-edge inflection point positions versus delta carbonate and ethane
shows a statistically significant correlation indicating a possible relation between microseepage
and spectral properties of wheat. This research demonstrates that at a field scale remote sensing
can potentially be used to detect hydrocarbon microseepages in areas of agricultural
monoculture.
http://www.informaworld.com/smpp/content~content=a713860106~db=all
Spectral responses of pot-grown plants to
displacement of soil oxygen
Authors: K. L. Smith a; M. D. Steven b; J. J. Colls a
Affiliations: a Division of Agricultural and Environmental Sciences, School of Bioscience,
b
School of Geography, University of Nottingham, University Park, Nottingham
NG7 2RD, UK
DOI: 10.1080/01431160410001729172
Publication Frequency: 24 issues per year
Published in:
International Journal of Remote Sensing, Volume 25, Issue 20 October 2004 ,
pages 4395 - 4410
Subjects: Environmental Sciences; GIS, Remote Sensing & Cartography; Methods &
Techniques: Remote Sensing; Methods & Techniques: Remote Sensing;
Number of References: 25
Formats available: PDF (English)
Previously published as: Remote Sensing Reviews (0275-7257)
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Abstract
Detection of leaking gas pipelines is important for safety, economic and environmental reasons,
and remote sensing of vegetation offers the potential to identify gas leakage through spectral
responses in the plants growing above. Pot-scale investigations were carried out to determine the
effects of soil-oxygen displacement using natural gas, argon, nitrogen and waterlogging on the
overlying vegetation and to determine whether changes in spectral characteristics were specific
to natural gas or were a generic response to soil-oxygen displacement.
Leaves responded to soil-oxygen displacement by increased reflectance in the visible
wavelengths and changes in the position and shape of the red edge. The red edge of control
plants shifted towards longer wavelengths as they matured, while the red edge of treated plants
remained stationary, indicating an inhibition of maturing. Bean and barley exhibited different
shapes in the peaks at the red edge. Argon and waterlogging produced greater responses than
natural gas, which was administered non-continuously.
These results suggest that the response to natural gas is generic to soil-oxygen deficiency rather
than specific to this agent. Hence, although it might be possible to detect leaking gas by remote
sensing of vegetation, ancillary information such as pipeline maps would be required to
discriminate natural gas responses from those due to other stresses.
http://www.informaworld.com/smpp/content~content=a713860106~db=all
Google: wavelet Landsat hydrocarbons
Remote detection of hydrocarbon microseepage-induced soil
alteration
Author: Almeida-Filho R.
Source: International Journal of Remote Sensing, Volume 23, Number 18, 20 September 2002 ,
pp. 3523-3524(2)
Publisher: Taylor and Francis Ltd
Terrain characteristics of a tonal anomaly remotely detected in
an area of hydrocarbon microseepage, Tucano Basin, northeastern Brazil
Authors: Almeida-Filho R.; Miranda F.P.; Galvão L.S.; Freitas C.C.
Source: International Journal of Remote Sensing, Volume 23, Number 18, 20 September 2002 ,
pp. 3893-3898(6)
Publisher: Taylor and Francis Ltd
This study reports the geological characteristics of a tonal anomaly in an area of hydrocarbon
microseepage, identified in Landsat-5 Thematic Mapper (TM) images. A diversified dataset was
gathered, which included soil gas geochemistry determinations, soil radioactivity intensity and soil
magnetic susceptibility measurements, as well as laboratory soil spectra. Data indicated that the tonal
anomaly holds a higher concentration of gaseous hydrocarbons in soils than the surroundings,
accompanied by enrichment in radioactive minerals. However, there is no definitive evidence of
magnetic mineral enrichment inside the tonal anomaly compared with the surroundings. An intense
silicification process, characterized by a cover of fine-grained silicified cobbles and boulders, seems to
be responsible for inhibiting the development of diagenetic clay mineralization, as indicated by
variations in the depth of the 2200 nm soil spectra absorption band.
Language: English
Document Type: Research article