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California Groundwater Ambient Monitoring and Assessment (GAMA) Program Domestic-Supply (Shallow) Aquifer Assessment Study Unit Boundaries for Assessment of Groundwater Resources

Dates

Publication Date
Start Date
2012
End Date
2022
Last Revision
2023-01-24

Citation

Watson, E., Johnson, T.D. and Dupuy, D.I., 2020, California Groundwater Ambient Monitoring and Assessment (GAMA) Program Domestic-Supply (Shallow) Aquifer Assessment Study Unit Boundaries and Grid Cells for Assessment of Groundwater Resources (ver. 2.0, January 2023): U.S. Geological Survey data release, https://doi.org/10.5066/P931PZRC.

Summary

The California Groundwater Ambient Monitoring and Assessment Program (GAMA) is a statewide assessment of groundwater quality designed to help better understand and identify risks to groundwater resources. GAMA is implemented by the California State Water Resources Control Board. The U.S. Geological Survey (USGS) is the technical lead for the Priority Basin Project (PBP), one of the components of the GAMA Program. Starting in 2012, GAMA began an assessment of water resources in domestic-supply (shallow) aquifers in California. These aquifers provide water for domestic and small community-supply wells, which are often drilled to shallower depths in the groundwater system than public-supply wells. Domestic-supply aquifers are of interest [...]

Contacts

Point of Contact :
Elise Watson
Originator :
Elise Watson, Tyler D Johnson, Danielle I. Dupuy
Metadata Contact :
Elise Watson
USGS Mission Area :
Water Resources
SDC Data Owner :
California Water Science Center
Distributor :
U.S. Geological Survey - ScienceBase

Attached Files

Click on title to download individual files attached to this item.

Shapefile: GAMA_PBP_SAA_Boundaries.zip
GAMA_PBP_SAA_Boundaries.CPG 5 Bytes
GAMA_PBP_SAA_Boundaries.dbf 2.69 KB
GAMA_PBP_SAA_Boundaries.prj 445 Bytes
GAMA_PBP_SAA_Boundaries.sbn 276 Bytes
GAMA_PBP_SAA_Boundaries.sbx 132 Bytes
GAMA_PBP_SAA_Boundaries.shp 1.71 MB
GAMA_PBP_SAA_Boundaries.shx 220 Bytes

Purpose

This digital data set was created as part of the study design for a statewide, comprehensive groundwater monitoring and assessment program (Belitz and others, 2003; Belitz and others, 2015; California State Water Resources Control Board, 2003). The purpose of this publication is to collect and assemble all of the study unit boundaries into a single GIS dataset. At the time of this publication, a total of 16 study units have been sampled, ranging from 1964 to 9843 square kilometers in size. Additional study units sampled as part of the GAMA program will be added to this data set when sampling for new study units is completed.

Map

Spatial Services

ScienceBase WMS

ScienceBase WFS

Communities

  • USGS California Water Science Center

Tags

Provenance

Data source
Input directly
Revision 2.0 by Elise Watson on January 24, 2023. To review the changes that were made, see “GAMA_PBP_SAA_DR_VersionHistory.docx” in the attached files section on the main landing page.

Additional Information

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