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Nourishment of San Luis Beach, Galveston Island, TX

by John R. Giardino, Texas A&M Univ, College Station, TX, USA,
Robert S. Bednarz, Texas A&M Univ, College Station, TX, USA,
John T. Bryant, Texas A&M Univ, College Station, TX, USA,



Document Type: Proceeding Paper

Part of: Coastal Zone '87

Abstract:

It has been proposed that one way of stopping shoreline retreat and protecting the foot of the Galveston Seawall is to nourish the complete length of the beach in front of the Seawall. A small-scale nourishment project was initiated in the spring of 1985 along a 458 m section of the Seawall. The project has been monitored through October of 1986. The beach was nourished with 11,460 m**3 of material that ranged in grain size from 0. 08 - 0. 15 mm. The native beach grain size ranged from 0. 10 - 0. 42 mm. During the 17 months of monitoring, the shoreline retreated approximately 53 m and lost approximately 16% of the material comprising the beach after the nourishment was completed. Beach material was found to have exited the system via the following pathways: 1) suspension and subsequent movement offshore, 2) end loss, 3) profile adjustment, and 4) aeolian transport.

Subject Headings: Beach protection and nourishment | Beach profiles | Shoreline protection | Sediment transport | Sea walls | Coastal protection structures | Transportation engineering | Texas | United States

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