HR: 13:40h
AN: G13A-01 INVITED     [Abstracts]
TI: Taking Measure of Natural Hazards with Satellite InSAR Imagery
AU: * Lu, Z
EM: lu@usgs.gov
AF: SAIC, USGS EROS, 47914 252 Street, Sioux Falls, SD 57198 United States
AB: Interferometric synthetic aperture radar (InSAR) imaging is a new, all-weather geodetic technique capable of measuring ground-surface deformation with centimeter to subcentimeter vertical precision and spatial resolution of tens-of-meter over a relatively large region. The spatial distribution of surface deformation data, derived from InSAR images acquired by European Remote Sensing Satellite (ERS)-1, ERS-2, Environmental Satellite (Envisat), Japanese Earth Resources Satellite (JERS)-1, and Canadian Radar Satellite (Radarsat)-1 enables the construction of detailed mechanical models to enhance the study of natural hazards induced by volcanic, seismic, landslide, and hydrogeologic processes. Measuring how a volcano's surface deforms before, during, and after eruptions provides essential information about magma dynamics and a basis for mitigating volcanic hazards. Measuring spatial and temporal patterns of surface deformation in seismically active regions is extraordinarily useful for understanding rupture dynamics and estimating seismic risks. Measuring how landslides develop and activate is a prerequisite to minimize associated hazards. Mapping surface subsidence and uplift related to extraction and injection of fluids in groundwater aquifers provides fundamental data on aquifer properties and processes and improves our ability to mitigate undesired consequences. Monitoring dynamic water-level changes beneath wetlands improves hydrological modeling predictions and enhances the assessment of future flood events over wetlands. We conclude that evolving satellite radar imagery combined with InSAR techniques are powerful tools for studying ground surface deformation associated with various natural hazards and will play an increasingly important role in better understanding, and eventually forecasting, natural hazards.
UR: http://edc.usgs.gov/Geo_Apps/
DE: 6924 Interferometry (1207, 1209, 1242)
DE: 7209 Earthquake dynamics (1242)
DE: 8419 Volcano monitoring (7280)
DE: 8488 Volcanic hazards and risks
SC: Geodesy [G]
MN: Fall Meeting 2005