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van der Werff, H.
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van der Werff, H.
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- PublicationOpen AccessMapping of semi-arid iron bearing red sands on emerged areas around lake marshes (Tablas de Daimiel, Spain) using hyperspectral DAIS 7915 spectrometer data(2006-02)
; ; ; ; ; ; ;Riaza, A.; Instituto Geológico y Minero de España (IGME), Madrid, Spain ;Garcia-Melendez, E.; Área de Geodinámica Externa, Facultad de Ciencias Ambientales, Universidad de León, Spain ;Suárez, M.; Departamento de Geología, Universidad de Salamanca, Spain ;Hausold, A.; DLR_German Aerospace Research Establishment, Remote Sensing Data Centre, Oberpfaffenhofen, Wessling, Deutschland ;Beisl, U.; DLR_German Aerospace Research Establishment, Remote Sensing Data Centre, Oberpfaffenhofen, Wessling, Deutschland ;van der Werff, H.; International Institute for Aerospace Survey and Earth Sciences (ITC), Enschede, The Netherlands; ; ; ; ; Wetlands are particularly sensitive environments receiving attention from the natural sciences community due to their wealth of both flora and fauna, and often considered as natural parks. In the Tablas de Daimiel (La Mancha, Central Spain), Digital Airborne Imaging Spectrometer data (DAIS 7915) have been analyzed to map geological processes on areas around the receding wetland which have never been flooded by water in the past. Sediments permanently exposed to the atmosphere dehydrate and oxide, developing different mineralogical associations arranged on planation surfaces. Such planation surfaces are key in the geological knowledge of recent climate change and landscape evolution. Progressive iron oxide/hydroxide rate and decarbonation can be spectrally followed on the Holocene sands framing the current marshy area. Such mineralogical changes are geologically registered on flat surfaces at different heights over the receding shore of the paleolake. Interacting erosion and sedimentation processes are responsible for the development of the flat morphological surfaces with increasing dryness. Maps are built for four different morphological units consisting of planation surfaces following chronologically the receding marsh during the last 2000 years before the present. Interactive spectral responses of mineralogical associations are described on the imagery, field and laboratory spectra.169 288