Southern California Beach Processes Study (SCBPS)

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Presentation transcript:

Southern California Beach Processes Study (SCBPS) Headwaters to Oceans Conference October 26, 2005 Julie Thomas, Dr. Robert Guza, Dr. Richard Seymour, Dr. William O’Reilly, Randy Bucciarelli

SCBPS MISSION Improve our understanding of beach sand transport by waves and currents. Improve local and regional management of sandy shorelines. Coastal tourism contributes to > $200 million/year to the local economy (Ashford) Coastal erosion affects 86% of the coast of California (Griggs & Savoy, 1985) Sea level rising from 9 to 88cm by year 2100. Coastal erosion threatens public and private safety and property. LEUCADIA, CA – FEB 2002

SURVEY COVERAGE REGION Coastal Data Information Program (CDIP) wave buoys LIDAR Started in May 2002 at the same time as the SANDAG Beach Replenishment Project. First area of in-situ surveys was at Torrey Pines. Develop predictive capabilities about beach erosion: Buoys – give us detailed history of wave conditions. In-Situ ATV & JetSki Surveys: San Onofre and Torrey Pines

TORREY PINES STATE BEACH Beach Nourishment Apr 11, 2001 Thanksgiving Storm Nov 23, 2001 Publication: Seymour et. Al, Coastal Engineering, 2004

Survey Instrumentation

Insitu Surveys Monthly: Low tide above waterline (exposed beach). Twice/Year: Extend to 8m depth Torrey Pines San Onofre

Optech LIDAR Instruments Torrey Pines State Beach Altitude: 1000 m Swath Width: 600 m 1 meter DEM Optech LIDAR Instruments

University of Texas & Scripps Collaboration ATV/LIDAR Survey Comparison Index Map Cross-shore Profiles

Elevation Change (May – Sep 2002) San Onofre – Low seasonal Variation. Torrey Pines – High seasonal Variation.

South Swell Northwest Swell Both San Onofre and - San Onofre exposed Torrey Pines are exposed to North swell. Torrey Pines sheltered

SCBPS Website Results available on website. http://cdip.ucsd.edu/SCBPS

FDGC Metadata and Survey Details available on the WEB

Long Beach - Mexican Border Web Products Long Beach - Mexican Border City Level Regional Level Beach Level Profile Level

Torrey Pines Golf Course Sep 2004 LIDAR Survey Beach Sand Levels Beach Sand Level Cliff elevation

Torrey Pines Change Map from May 2002 to September 2002

COASTAL FRONTIERS PROFILES

Collaboration Seismic Reflection/MultiBeam/LIDAR Southern California Coastal Ocean Observing System (SCCOOS)

Newport October 18, 2005