Shum, C. ., School of Earth Sciences, Ohio, Columbus, USA, ckshum@osu.edu
Lee, H. ., School of Earth Sciences, Ohio State University, Columbus, USA, lee.2444@osu.edu
Alsdorf, D. ., Ohio State University, Columbus, USA, alsdorf@geology.ohio-state.edu
Ibaraki, M. ., School of Earth Sciences, Ohio State University, Columbus, USA, ibaraki.1@osu.edu
Lu, Z. ., U.S. Geological Survey, Vancouver, USA, lu@usgs.gov
Braun, A. ., University of Calgary, Calgary, Canada, braun@ucalgary.ca
Kuo, C. ., National Cheng Kung University , Tainan, Taiwan ROC, kuo70@mail.ncku.edu.tw
Cheng, K. ., National Chung Cheng University , Chia-Yi, Taiwan ROC, Cheng.168@eq.ccu.edu.tw

LOUISIANA WETLAND MONITORING USING SATELLITE ALTIMETRY AND SAR INTERFEROMETRY

At present, accurate monitoring of coastal estuaries and wetland water level changes and its changes relative to the shoreline presents a challenge to the contemporary spaceborne active remote-sensing tools, including the pulsed-limited nadar radar altimeters and the repeat-pass synthetic aperture radar interferometry (InSAR). While the Ku-bank radar altimetry and the innovative use of the double-bounce SAR interferometry have been demonstrated to be feasible to observe water level changes in vegetated wetlands, the establishment of absolute and high-resolution (e.g., up to 40-m) water level change time series remain difficult. Here we present a study using retracked Ku-band radar altimetry (TOPEX, ENVISAT) water level change time series (up to decadal), and high-resolution relative water level changes using ERS C-band InSAR over the Louisiana watershed/wetland region. We assess the impact of environmental corrections (water vapor and ionosphere) on the altimetric water level over the wetlands. With the use of available water stage data, we provide a separation of land subsidence and water level change, allowing the feasibility to accurately link the solid Earth to the water level.

http://geodeticscience.osu.edu

Oral presentation

Presentation is given by student: No
Session #:006
Date: 03-05-2008
Time: 17:15