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San Francisco Bay Bathymetry | U.S. Geological Survey

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Official websites use .gov A .gov website belongs to an official government organization in the United States. Secure .gov websites use HTTPS A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites. Frequently Asked Questions Bathymetry of a dynamic tidal estuary, such as San Francisco Bay, provides the observable linkage between anthropogenic modifications of the landscape—such as evolving land use practices, flood control, and water diversions—and natural forces of climate-driven river flow, sea level change, tides, and wind. By examining our record of hydrographic surveys, spanning over 150 years, we can gain insights into the probable effect of future modification including efforts toward restoration. In addition to historical change analysis, current bathymetry is critical for the calibration and interpretation of hydrodynamic and

Methods In the example sequence shown below, the first step in the preparation of regular grids displayed on this web site begins with irregular hydrographic survey data (soundings) that have been corrected to a common datum (1). The National Oceanic and Atmospheric Administration (NOAA) is the primary resource for obtaining these original soundings. Other agencies, including the US Army Corps of Engineers, California Department of Water Resources, US Bureau of Reclamation, and the USGS, have contributed local studies. Once the soundings are in hand they are contoured, and shoreline and…

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