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The above image is an illustration and should not be used for navigational purposes.
The backscatter maps of west-central San Francisco Bay were gridded at 2-m resolution.
The images of the disposal site just south of Alcatraz Island show that the dumped sediment apparently has been intrained into a flow back into the bay (to the north, then east of Alcatraz Island). This flow would be related to the incoming flood tide.
The shaded-relief image of the land surrounding San Francisco Bay was constructed using a DEM (Digital Elevation Model) with 10-meter resolution provided by the USGS National Mapping Division.
U.S. Department of the Interior U.S. Geological Survey Western Coastal & Marine Geology Seafloor Mapping
URL: http://walrus.wr.usgs.gov/pacmaps/sf_backs.html
maintained by Pete Dartnell
last modified 15 November 2006 (lzt)