severe beach erosion at surfside, texas caused by engineering changes to the coast and rivers
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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. Beach Erosion at Surfside , 1/11/2007. TexasCoastGeology.com. A River of Sand, Sand Movement in the Surf Zone. - PowerPoint PPT PresentationTRANSCRIPT
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
Beach Erosion at SurfsideBeach Erosion at Surfside, , 1/11/20071/11/2007
TexasCoastGeology.com
A River of Sand,A River of Sand,Sand Movement in the Surf ZoneSand 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
Galveston East JettyGalveston East Jetty, , 23 million cubic meters of sand 23 million cubic meters of sand storedstored(4 million dump trucks)(4 million dump trucks)
TexasCoastGeology.com
TexasCoastGeology.com
7.6 million cubic meters lost from the
beach
The Octagon, 1969
From Surfrider Foundation website
The Octagon, 2000From Surfriders website
From Surfrider Foundation website
H. Rita Landfall, H. Rita Landfall, 20052005
TexasCoastGeology.com
Surfside Village after Surfside Village after RitaRita
TexasCoastGeology.com
Surfside Village, TX after Surfside Village, TX after RitaRita
TexasCoastGeology.com
Freeport Jetties, Surfside
Old Delta
Location
New Delta
Freeport Channel
TexasCoastGeology.com
Brazos River Deltas Brazos River Deltas 19351935
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 Brazos River Deltas 19541954
TexasCoastGeology.com
Old DeltaNew Delta
Location of Surfside
Brazos R. Sediment Brazos R. Sediment DischargeDischarge
From Mathewson & Minter, 1976
Brazos Deltas circa 2002Brazos Deltas circa 2002
New Delta
Old Delta
Surfside
Historic Shorelines, Historic Shorelines, SurfsideSurfside
1930 (river m
oved in 1929)19501960
19802000
From Texas General Land Office, Data by Bureau of Eco. Geol., Aerial Photo
2006
Freeport dredging Freeport dredging doubleddoubled
TexasCoastGeology.com
Relative Sea Level Rise, Galveston, Relative Sea Level Rise, Galveston, TXTX
From James Gibeaut, Bureau of Economic Geology, Univ. Texas, Austin
Surfside has many causes of Surfside has many causes of shoreline retreatshoreline retreat
• Brazos River mouth and delta movedBrazos River mouth and delta moved
• Freeport Entrance greatly enlargedFreeport Entrance greatly enlarged
• Subsidence due to water extractionSubsidence due to water extraction
• Updrift sand impoundments at jettiesUpdrift sand impoundments at jetties
• Updrift sand loss at man-made inletUpdrift sand loss at man-made inlet
• Sea level riseSea level rise
• Reduced sand from rivers due to damsReduced sand from rivers due to dams
New Brazos River Delta, 1999
San Bernard River
Surfside Village
Old
Sh
ore
line
All Storms Since All Storms Since 18511851
TexasCoastGeology.com
Don’t park too close to the Don’t park too close to the waterwater
TexasCoastGeology.com
Richard L. Watson, Ph.D.
TexasCoastGeology.com
(361) 749-4152
That’s All Folks!