Temporal dynamics of spring complexes
Other Publication ResearchOnline@JCUAbstract
Analysis and interpretation of moderate spatial resolution, high temporal frequency satellite imagery documented seasonal growth cycles of the dominant wetland vegetation types. Different wetland communities have characteristic seasonal phenological patterns of greening and drying, distinct from those of dryland and intermittent watercourse vegetation. This information can be used to recommend appropriate timing of image and field data collection for future spring monitoring. Changes in wetland area for Dalhousie and Hermit Hill complexes were documented over the past decade with fortnightly time steps. Seasonal fluctuations are underlain by decade-long trends in changing wetland area, strongly influenced by total rainfall in the preceding 6–12 months. Very high spatial resolution satellite images of vegetation greenness provided highly detailed delineations of the extent of spring-fed wetland vegetation. In addition, high spectral resolution airborne images of selected spring groups acquired in 2009 and 2011 enabled comparisons of dry and wet antecedent conditions. Spectral mapping techniques revealed changes in the extent and species composition of spring-fed wetland vegetation and surrounding wetted area and diffuse discharge.
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Publication Name
Spatial Survey and Remote Sensing of Artesian Springs of the Western Great Artesian Basin
Volume
IV
ISBN/ISSN
978-1-922136-09-1
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Pages Count
27
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Publisher
National Water Commission
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Publisher Location
Canberra, ACT, Australia
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DOI
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