Wetlands

, Volume 30, Issue 1, pp 1–13

Hydrologic Dynamics of the Ground-Water-Dependent Sian Ka’an Wetlands, Mexico, Derived from InSAR and SAR Data

  • Bibi R. N. Gondwe
  • Sang-Hoon Hong
  • Shimon Wdowinski
  • Peter Bauer-Gottwein
Original Paper

DOI: 10.1007/s13157-009-0016-z

Cite this article as:
Gondwe, B.R.N., Hong, SH., Wdowinski, S. et al. Wetlands (2010) 30: 1. doi:10.1007/s13157-009-0016-z

Abstract

The 5,280 km2 Sian Ka’an Biosphere Reserve includes pristine wetlands fed by ground water from the karst aquifer of the Yucatan Peninsula, Mexico. The inflow through underground karst structures is hard to observe making it difficult to understand, quantify, and predict the wetland dynamics. Remotely sensed Synthetic Aperture Radar (SAR) amplitude and phase observations offer new opportunities to obtain information on hydrologic dynamics useful for wetland management. Backscatter amplitude of SAR data can be used to map flooding extent. Interferometric processing of the backscattered SAR phase data (InSAR) produces temporal phase-changes that can be related to relative water level changes in vegetated wetlands. We used 56 RADARSAT-1 SAR acquisitions to calculate 38 interferograms and 13 flooding maps with 24 day and 48 day time intervals covering July 2006 to March 2008. Flooding extent varied between 1,067 km2 and 2,588 km2 during the study period, and main water input was seen to take place in sloughs during October–December. We propose that main water input areas are associated with water-filled faults that transport ground water from the catchment to the wetlands. InSAR and Landsat data revealed local-scale water divides and surface water flow directions within the wetlands.

Keywords

HydrologyRemote sensingSurface waterSynthetic aperture radar interferometryYucatan Peninsula

Copyright information

© Society of Wetland Scientists 2009

Authors and Affiliations

  • Bibi R. N. Gondwe
    • 1
  • Sang-Hoon Hong
    • 2
  • Shimon Wdowinski
    • 2
  • Peter Bauer-Gottwein
    • 1
  1. 1.Department of Environmental EngineeringTechnical University of DenmarkKgs. LyngbyDenmark
  2. 2.Division of Marine Geology and GeophysicsUniversity of MiamiMiamiUSA