HR: 1330h
AN: G43A-04    [Abstracts]
TI: Observation of Subsidence in New Orleans Using Permanent Scatterers
AU: * Kim, S
EM: skim@rsmas.miami.edu
AF: Division of Marine Geology and Geophysics, University of Miami, 4600 Rickenbacker Causeway, Miami, FL 33149-1098 United States
AU: Ferretti, A
EM: alessandro.ferretti@treuropa.com
AF: Tele-Rilevamento Europa - T.R.E. s.r.l. a POLIMI spin-off company, Via Vittoria Colonna, 7, Milano, 20149 Italy
AU: Novali, F
EM: fabrizio.novali@treuropa.com
AF: Tele-Rilevamento Europa - T.R.E. s.r.l. a POLIMI spin-off company, Via Vittoria Colonna, 7, Milano, 20149 Italy
AU: Wdowinski, S
AF: Division of Marine Geology and Geophysics, University of Miami, 4600 Rickenbacker Causeway, Miami, FL 33149-1098 United States
AU: Amelung, F
AF: Division of Marine Geology and Geophysics, University of Miami, 4600 Rickenbacker Causeway, Miami, FL 33149-1098 United States
AU: Dixon, T H
AF: Division of Marine Geology and Geophysics, University of Miami, 4600 Rickenbacker Causeway, Miami, FL 33149-1098 United States
AU: Dokka, R K
EM: rkdokka@c4g.lsu.edu
AF: Louisiana State University, Main Post Office, Baton Rouge, LA 70803 United States
AU: Rabus, B
EM: brabus@mda.ca
AF: MDA, 13800 Commerce Parkway, Richmond, BC Canada
AB: In Louisiana, areas along the coast are sinking as much as one inch a year, and the state loses approximately 35 square miles per year due to ground subsidence and coastal erosion. Subsidence in the region has leads to loss of coastal wetlands and increased vulnerability to flooding and coastal storm inundation. Some of the technology for monitoring statewide elevation change is already in place. The Louisiana Spatial Reference Center (LSRC) is capable of measuring land movement as small as a few millimeters per year using Global Positioning System satellites. However, the lack of precise and high resolution quantitative spatial data on subsidence has limited development of a satisfactory theory to explain all aspects of modern surface motions. In this study, we apply the method of permanent scatterer SAR interferometry (PSInSAR) to detect and quantitatively measure land subsidence in New Orleans. PSInSAR is a fully operational tool for millimeter-scale accuracy ground deformation mapping on a dense grid of persistent targets. High accuracy and spatially dense subsidence data lead to enhanced understanding via mechanical modeling. Our results will be tested against GPS and another InSAR result that may be derived from RADARSAT-1.
DE: 6924 Interferometry
SC: Geodesy [G]
MN: 2005 Joint Assembly