Abstract:

Environmental Sensitivity Index (ESI) mapping of the Texas coastline

was conducted in the Galveston Bay system and north to the Louisiana

border (Morton and White, 1995). ESI classification of the shoreline

was interpreted from aerial videography and transferred to paper USGS

7.5' quadrangle maps. Aerial photography and National Wetlands Inventory

(NWI) data provided supplementary information where aerial videography

was lacking. Information from the 7.5' quads was digitized and coded as

to the ESI classification.

Purpose:

ESI mapping is conducted primarily for oil spill response

applications.

Limitations_of_Data:

The original mapping was conducted at 1:24,000 scale.

Therefore, this dataset should not be used for mapping at

scales larger than 1:24,000.

Entity_and_Attribute_Overview:

The .aat contains the ESI code for each portion of the

shoreline. The ESI code is defined as a character item

10 characters in width.

Standardized ESI Rankings for Texas

ESI No. Shoreline Type

1 Exposed walls and other structures made of concrete,

wood, or metal

2A Scarps and steep slopes in clay

2B Wave-cut clay platform

3A Fine-grained sand beaches

3B Scarps and steep slopes in sand

4 Coarse-grained sand beaches

5 Mixed sand and gravel(shell) beaches

6A Gravel (shell) beaches

6B Exposed riprap structures

7 Exposed tidal flats

8A Sheltered solid man-made structures, such as bulkheads

and docks

8B Sheltered riprap structures

8C Sheltered scarps

9 Sheltered tidal flats

10A Salt- and brackish-water marshes

10B Fresh-water marshes (herbaceous vegetation)

10C Fresh-water swamps (woody vegetation)

10D Mangroves

Procedures_Used:

See abstract.

Revisions:

Reviews_Applied_to_Data:

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References_Cited:

Morton, R .A., and White, W. A., 1995, Shoreline types of the upper Texas coast:

Sabine-Galveston-Freeport-Sargent areas: The University of Texas at

Austin, Bureau of Economic Geology, final report prepared for the Texas Natural

Resources Inventory Program, Texas General Land Office, Texas Natural Resource

Conservation Commission, and Texas Parks and Wildlife Department under GLO

contract no. 94-177R and Minerals Management Service Gulfwide Information

Systems at Louisiana State University, CMI-30660-19901, 42 p.

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