Geophysical Surveys of the San Andreas and Crystal Springs Reservoir System Including Seismic-Reflection Profiles and Swath Bathymetry, San Mateo County, California

Figures

Figure 1. (2.0 MB)
Location of San Andreas Lake and Upper and Lower Crystal Springs Reservoir, San Mateo County, California (Map courtesy of Google Inc. 2008).
Figure 2. (0.3 MB)
15-second epoch-rate post-processed kinematic vertical positions of the vessel waterline with a 5-minute running median filter of the data shown as a red line. The filtered line was input into the Swath Processor software during post-processing as a tide curve. This established the vertical datum of the San Andreas Reservoir survey as WGS84 G1150/ITRF2000. Equipment upgrades after the San Andreas Reservoir survey eliminated the need to do this procedure during the Crystal Springs Survey.
Figure 3. (0.1 MB)
(Left) Plot of water temperature as a function of depth (1 dbar pressure is approximately equivalent to 1-m depth); (Right) Sound velocity as a function of water depth.
Figure 4. (0.1 MB)
Daily temperature (left) and sound-velocity profile (right) measurements taken at Upper and Lower Crystal Springs Reservoir, San Mateo County, California (1 dbar is equivalent to 1-m water depth).
Figure 5. (0.4 MB)
Data processing workflow showing data sources and processing software.
Figure 6. (1.0 MB)
The Geoid03 model difference between WGS84 G1150 and NAVD88 projected into UTM Zone 10 coordinates with a 10-m-cell spacing using cubic convolution. The outlines of San Andreas Lake and Crystal Springs Reservoir are shown for reference.
Figure 7. (0.7 MB)
Combined bathymetry and topography of San Andreas Lake with elevations in NAVD88 on the NAD83 CORS96 ellipsoid, San Mateo County, California.
Figure 8. (0.6 MB)
Combined bathymetry and topography of Upper and Lower Crystal Springs Reservoir, San Mateo County, California. Elevations are NAVD88 on the NAD83 CORS96 ellipsoid.
Figure 9. (0.4 MB)
Plot of the 1st Standard Deviation of elevation samples falling within each 1-m cell in the San Andreas Lake DEM.
Figure 10. (0.3 MB)
Plot of the 1st Standard Deviation of elevation samples that fall within the 1-m cells used to create the Crystal Springs DEM.

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For more information, contact David Finlayson.