Multitemporal multitrack monitoring of wetland water levels in the florida everglades using alos palsar data with interferometric processing

S. H. Hong, S. Wdowinski

Research output: Contribution to journalArticle

18 Scopus citations

Abstract

We present an improved wetland interferometric synthetic aperture radar (InSAR) technique that uses multitrack SAR data and ground-based stage (water level) data to calculate a time series of high spatial resolution water level maps throughout wide wetland areas. The technique was applied to a wetland area in the northern Everglades, Florida, using a four-year-long Advanced Land Observing Satellite (ALOS) Phased Array L-band Synthetic Aperture Rada (PALSAR) data set acquired during 2007-2011. Although the temporal resolution of ALOS PALSAR interferograms is low (multiples of the satellite's 46-day revisit cycle), the multitrack algorithm combines results from the four tracks and significantly improves the observation frequency up to seven days in the best case. A quality control analysis indicates that the average root-mean-square error of the differences between the InSAR- and stage-based water levels is 4.2 cm. The end products of absolute water level time series with improved temporal and high spatial resolutions can be used as excellent constraints for high spatial resolution wetland flow models and other water resource applications.

Original languageEnglish (US)
Article number6684321
Pages (from-to)1355-1359
Number of pages5
JournalIEEE Geoscience and Remote Sensing Letters
Volume11
Issue number8
DOIs
StatePublished - Aug 2014

Keywords

  • Absolute water level
  • Water Conservation Area 1 (WCA1)
  • everglades
  • interferometric synthetic aperture radar (InSAR) time series
  • multitrack
  • small temporal baseline subset (STBAS)
  • temporal resolution
  • wetlands

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Electrical and Electronic Engineering

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