Subsidence

Texas Hazard Mitigation Package (THMP)

Data Layer:	Subsidence (Feet): 1906 - 1987
Content:	Amount of subsidence in feet, recorded from 1906 to 1987, summarized by county
Map:	Counties categorized into 5 classes using user defined method
Use Notes:	Identify the relative risk of this hazard, as expressed by historical occurrences
Metadata:
Download:	Direct statewide download of this data layer. User options for downloading this data layer or others by county (or statewide), use the Download Utility
Source:	Data layer was compiled internally, sourced from UT / BEG -- see Subsidence Risk Zones below

Data Layer:	Subsidence Risk Zones
Content:	Recorded subsidence areas, in feet.
Map:	Coastal and inland areas categorized into 5 classes of subsidence in feet, displayed by isolines
Use Notes:	Classes are not rounded to nearest foot
Metadata:
Download:	Direct statewide download of this data layer. User options for downloading this data layer or others by county (or statewide), use the Download Utility
Source:	The University of Texas / Bureau of Economic Geology www.beg.utexas.edu/coastal/hazard_atlas1.htm www.beg.utexas.edu/coastal/hazard_atlas2.htm ...Direct link to source map: www.landsubsidence.org/Map1_files/slide0015.html

OTHER MAPS AND DATA

Land Subsidence (Harris, Galveston, Fort Bend Co.'s)
http://www.landsubsidence.org/

http://www.landsubsidence.org/Map2_files/slide0013.html www.landsubsidence.org/Map4_files/slide0011.html

OTHER HAZARD INFO

Subsidence and Fault Activation Project:
USGS / Coastal and Marine Geology
coastal.er.usgs.gov/gc-subsidence/overview.html

Harris-Galveston Subsidence District
www.subsidence.org

Fort Bend Subsidence District
www.fbsubsidence.org

USGS reports related to Subsidence in the Houston-Galveston Region
tx.usgs.gov/subsidence/index.html

Report: water.usgs.gov/pubs/circ/circ1182/pdf/07Houston.pdf