Coastal Erosion

Texas Hazard Mitigation Package (THMP)

 

SUMMARY DATA

 

Data Layer:
Coastal Erosion (Ft. per Yr.): 1931-2000
Content:
Coastal Erosion, in terms of average shoreline change in feet per year, for the period 1931 to 2000, summarized by county.
Counties categorized into 5 classes using the natural breaks method
Use Notes:

Identify the relative risk of this hazard, as expressed by historical occurrences.
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, using data from the Bureau of Economic Geology, UT Austin
www.beg.utexas.edu/index.html

Direct access to the Coastal Erosion (Shoreline Change) sources:
www.beg.utexas.edu/coastal/ hazardsIndex.htm

www.beg.utexas.edu/coastal/hazard_atlas1
www.beg.utexas.edu/coastal/hazard_atlas2
www.beg.utexas.edu/coastal/hazard_atlas3

 

DETAILED DATA

 

Data Layer:
Coastal Erosion Rates (Ft. per Yr.): 1931-2000
Content:
Texas Coastal Erosion Rates, in terms of average shoreline change in feet per year, for the period 1931 to 2000.

Erosion points or stations along the Texas Coast (shorelines). In Gulf of Mexico shorelines the points are placed 164ft (50 meters) apart, while those along the Bays are placed 25 meters apart. The values range from less than -16 ft of change to 140 ft of change.

Use Notes:

Assists in determining average rates of change per year to this type of hazard.

Limitations of the data:
The erosion points were digitized at 1:24000 scale. It is important to note that interpretation or analysis using this data layer at scales larger than 1:24000 could result in a loss of accuracy. Reference should be made at 1:24000 scale or smaller.
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, using data from the Bureau of Economic Geology, UT Austin
www.beg.utexas.edu/index.html

Direct access to the Coastal Erosion (Shoreline Change) sources:
www.beg.utexas.edu/coastal/ hazardsIndex.htm

www.beg.utexas.edu/coastal/hazard_atlas1
www.beg.utexas.edu/coastal/hazard_atlas2
www.beg.utexas.edu/coastal/hazard_atlas3

 

Data Layer:
Coastal Shoreline Types (ESI)
Content:
Shoreline types for the coastline of Texas.

Environmental Sensitivity Index (ESI) mapping of the Texas coastline by shoreline type.

Standardized ESI Rankings for Texas (scroll down)

Use Notes:

Assists in showing the various types of shorelines along the Texas coast.
(Some segments have more than one shoreline type.)

Limitations of Data:
The original mapping was conducted at 1:24,000 scale. Therefore, this data layer should not be used for mapping at scales larger than 1:24,000.

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 using data from the General Land Office (GLO), which was based on data created by the Bureau of Economic Geology, UT Austin.

Bureau of Economic Geology
www.beg.utexas.edu/index.html

Direct access to the data source:
www.glo.state.tx.us/gisdata/gisdata.html
(under Coastal/Oil Spill Response Data - Environmental Sensitivity Index Shoreline)

 

 

OTHER MAPS AND DATA

 

NOAA Coastal Services Center / Shoreline Data
http://www.csc.noaa.gov/shoreline/index.html

Texas Coastal Ocean Observation Network
lighthouse.tamucc.edu/TCOON/HomePage

USGS / Gulf of Mexico Shoreline Change Map Viewer
coastalmap.marine.usgs.gov/ArcIMS/Website/usa/GoMex/shoreline_change/viewer.htm

USGS / Galveston Bay Project: Wetlands and Subsidence
gulfsci.usgs.gov/galveston/index.html

General Land Office (GLO) / Texas Coastal Natural Resource Inventory (NRI)
http://www.glo.state.tx.us/nri/

 

OTHER HAZARD INFO

 

General Land Office (GLO) / Coastal Erosion Planning and Response Program
http://www.glo.state.tx.us/coastal/erosion.html

Bureau of Economic Geology / Measuring Shoreline Change Along Bays and Oceans
http://www.beg.utexas.edu/coastal/poster_measuringchange.htm

An Overview of Coastal Land Loss: With Emphasis on the Southeastern United States
pubs.usgs.gov/of/2003/of03-337/intro.html

FEMA / Significant Losses From Coastal Erosion Anticipated Along U.S. Coastlines
www.fema.gov/nwz00/erosion.shtm

NOAA / National Ocean Service
www.nos.noaa.gov/

USGS / National Assessment of Coastal Change Hazards
coastal.er.usgs.gov/national-assessment/index.html

NGS / Coastal Mapping Program
http://www.ngs.noaa.gov/RSD/rsd_home_cmp.shtml

National Assessment of Coastal Vulnerability to Sea-Level Rise: Preliminary Results for the U.S. Gulf of Mexico Coast
pubs.usgs.gov/of/of00-179/