Severe beach erosion at Surfside, Texas caused by engineering changes to the coast and rivers Richard L. Watson, Ph.D. TexasCoastGeology.com (361) 749-4152.

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Presentation transcript:

Severe beach erosion at Surfside, Texas caused by engineering changes to the coast and rivers Richard L. Watson, Ph.D. TexasCoastGeology.com (361)

Narrated Version Available A narrated version of this slide show is available. It is a recording of the actual presentation at GSA Denver. A narrated version of this slide show is available. It is a recording of the actual presentation at GSA Denver. You can click here to download a narrated copy of the presentation. It is about 13 MB, so it will take time to download. You can click here to download a narrated copy of the presentation. It is about 13 MB, so it will take time to download. You can click here to download a narrated copy of the presentation. It is about 13 MB, so it will take time to download. You can click here to download a narrated copy of the presentation. It is about 13 MB, so it will take time to download. Download the file surfsidesound.pps Download the file surfsidesound.pps Download the file surfsidesound.pps Download the file surfsidesound.pps

Beach Erosion at Surfside, 1/11/2007 TexasCoastGeology.com

A River of Sand, Sand Movement in the Surf Zone 700,000 to 800,000 cuyd/yr 250 Dump Trucks Per Day One Dump Truck Every 6 Minutes TexasCoastGeology.com

Sabine TexasCoastGeology.com

Galveston East Jetty, 23 million cubic meters of sand stored (4 million dump trucks) TexasCoastGeology.com

7.6 million cubic meters lost from the beach

The Octagon, 1969 From Surfrider Foundation website

The Octagon, 2000 From Surfriders website From Surfrider Foundation website

H. Rita Landfall, 2005 TexasCoastGeology.com

Surfside Village after Rita TexasCoastGeology.com

Surfside Village, TX after Rita TexasCoastGeology.com

Freeport Jetties, Surfside Old Delta Location New Delta Freeport Channel TexasCoastGeology.com

Brazos River Deltas 1935 TexasCoastGeology.com New Delta Old Delta River moved in 1929 Location of Surfside

Brazos River Delta, 1938 NEW OLD Location of Surfside

Brazos River Deltas 1954 TexasCoastGeology.com Old Delta New Delta Location of Surfside

Brazos R. Sediment Discharge From Mathewson & Minter, 1976

Brazos Deltas circa 2002 New Delta Old Delta Surfside

Historic Shorelines, Surfside 1930 (river moved in 1929) From Texas General Land Office, Data by Bureau of Eco. Geol., Aerial Photo 2006

Freeport dredging doubled TexasCoastGeology.com

Relative Sea Level Rise, Galveston, TX From James Gibeaut, Bureau of Economic Geology, Univ. Texas, Austin

Surfside has many causes of shoreline retreat Brazos River mouth and delta moved Brazos River mouth and delta moved Freeport Entrance greatly enlarged Freeport Entrance greatly enlarged Subsidence due to water extraction Subsidence due to water extraction Updrift sand impoundments at jetties Updrift sand impoundments at jetties Updrift sand loss at man-made inlet Updrift sand loss at man-made inlet Sea level rise Sea level rise Reduced sand from rivers due to dams Reduced sand from rivers due to dams

New Brazos River Delta, 1999 San Bernard River Surfside Village Old Shoreline

All Storms Since 1851 TexasCoastGeology.com

Richard L. Watson, Ph.D. TexasCoastGeology.com (361) Thats All Folks! You can click here to download a narrated copy of the presentation. It is about 13 MB, so it will take time to download. You can click here to download a narrated copy of the presentation. It is about 13 MB, so it will take time to download. Download the file surfsidesound.pps Download the file surfsidesound.pps. Download the file surfsidesound.pps. Download the file surfsidesound.pps