Houston-Galveston Bay Area,
Texas, From Space—
A New Tool for Mapping Land Subsidence
By S.V. Stork and M. Sneed
Fact Sheet 110-02
In cooperation with the U.S. Fish and Wildlife
Service
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Contents
Consequences
of Land Subsidence
InSAR
InSAR-Detected
Inland Subsidence, 1996
InSAR-Detected
Coastal Subsidence, 1996–99
Integrated
Monitoring in the 21st Century
Selected
References
Figures
1. Map showing subsidence study area and extent of
two satellite scenes, Houston-Galveston Bay area, Texas
2. Map showing extent of subsidence in the Houston-Galveston
Bay area during 1906–95
3. Map and graphs showing that during 1978–95, subsidence
in areas southeast of Houston essentially ceased as pumpage there decreased;
and subsidence continued in areas northwest as pumpage there increased
4. Photograph showing land subsidence of 5 to 7 feet
in a residential area in northern Houston exacerbated flooding in June 1989
5. Map showing areas of interferograms shown in figures
6–9
6. Wrapped and unwrapped interferograms for the western
Houston area for the 11.5-month period January 13–December 29, 1996
7. Unwrapped interferogram for the Texas City area
for the 31-month period August 27, 1996–March 29, 1999
8. Unwrapped interferogram for the Sagemeadow-Johnson
Space Center area for the 31-month period August 27, 1996–March 29, 1999
9. Unwrapped interferogram for the Baytown area for
the 31-month period August 27, 1996–March 29, 1999
