Bureau of Economic Geology The University of Texas at Austin.

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Presentation transcript:

Bureau of Economic Geology The University of Texas at Austin

GEOTUBES ALONG THE UPPER COAST Preliminary Observations James Gibeaut Coastal Coordination Council Executive Committee Special Meeting November 12, 2001

Long-term Average Annual Rate of Shoreline Change

Geotube Schematic Approx. 30 ft Approx. 7 ft

InstallationCovered and vegetated ExposedMaintenance

Treasure Island July 19, 2001

Geotube Locations July 2001 Rollover Pass San Luis Pass Gilchrist East 6,200 feet Gilchrist East Total = 6.32 miles Gilchrist West Gilchrist West14,400 Dellanera Dellanera 1,590 Pocket Park 2 Pocket Park Riviera Riviera 590 Pirates Beach Pirates Beach 8,540 Treasure Island, North, Middle, South Treasure Island 1,650

2001 July 1997 Nov 1998 Pre- Frances 1998 Post- Frances 2000 May LIDAR Topographic Images Gilchrist East Geotube Area Rollover Pass Gulf of Mexico 1,000 ft

Pirates Beach on Galveston Island June 14, 2001

Exposed Geotubes June 13, 2001 ProjectExposed (ft)% Exposed Gilchrist, East1,67027 Gilchrist, West10,63074 Dellanera41326 Pocket Park 200 Riviera00 Pirates Beach85010 Treasure Isl Total14,52043

Beach Profile Gilchrist West (GLO-021) Height in meters Distance in meters geotube

GLO-021 Profile Location Sept. 23, 1999

June 13, 2001 GLO-21 Profile Location July 18, 2001

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