Shallow Groundwater Mapping: Alameda, Marin, San Francisco, and San Mateo Counties
This dataset includes depth-to-groundwater maps produced by Pathways Climate Institute and San Francisco Estuary Institute under a grant from the Bay Area Council's California Resilience Challenge. For more information, please visit the project page.
Each link below is a zipped file containing a geodatabase (GDB). There is one zip file for each county covered by this analysis. Each zipped GDB contains:
- Raster layers of depth to groundwater for current conditions and under 10 future sea-level rise scenarios: 12", 24", 36", 48", 52", 66", 77", 84", 96", 108". These align with the scenarios used in BCDC's mapping for the ART Bay Shoreline Flood Explorer.
- Polygon layers of emergent groundwater for current conditions and under the same 10 future sea-level rise scenarios
- Polygon layers of groundwater within 6 feet of the ground surface for current conditions and under the same 10 future sea-level rise scenarios (impacts to underground infrastructure from high groundwater tables are possible within 6 feet of the ground surface; see the accompanying documentation for more information).
- Polygon layer showing inland areas in each county not mapped for this analysis.
- Polygon layer showing areas of low confidence due to recent grade changes not reflected in the Digital Elevation Model used as an input to the groundwater mapping.
These datasets are meant for planning purposes and are a best estimate of groundwater levels based on available empirical data. More refined analysis is needed for site scale engineering and design.
DOWNLOAD LINKS
For more background on groundwater rise, the methods used to develop these GIS layers, and other information, please download the accompanying report.
You can also view these data and overlays of emergent groundwater layers with sea-level rise layers from the ART Bay Shoreline Flood Explorer in interactive online web maps:
Creation Date:
Friday, December 16, 2022
Last Updated:
Friday, December 16, 2022
Type of Data:
GIS vector dataset
GIS imagery/raster
Programs and Focus Areas:
Environmental Informatics Program
Resilient Landscapes Program
Shoreline Resilience
Associated Staff:
Funders:
Partners:
Related Projects, News, and Events:

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