Data and Tools
We have a long history of data collection, monitoring, and reporting. With the passage of the Sustainable Groundwater Management Act (SGMA), there is an increased need for local and state agencies and the public to easily access water data in order to make informed management decisions. , there is an increased need for local and state agencies and the public to easily access water data in order to make informed management decisions.
Science-based analysis of complex issues may require the analysis of multiple datasets, such as the study of groundwater and surface water interaction, or evaluating the impact of water quality on water quality. The following data collections, interactive mapping tools, and reports are important resources to inform sustainable groundwater management decision-making.
DWR's SGMA Portal allows local agencies, groundwater sustainability agencies (GSAs), and watermasters to submit, modify, and view the information required by the Sustainable Groundwater Management Act (SGMA). It also enables you to view submitted information and provide comments, where applicable. You don't need a login for public access.
The Water Data Library contains hydrologic data (groundwater level data and some groundwater quality data) for over 35,000 wells in California. The data is collected by DWR Region Offices and dozens of local and federal cooperators.
California Statewide Groundwater Elevation Monitoring (CASGEM) Program - In 2009, the Legislature passed SBX7 6, which establishes, for the first time in California, collaboration between local monitoring parties and DWR to collect groundwater elevations statewide and that this information be made available to the public.
The CADWR Land Use Viewer allows you to easily view and download both statewide (as recent as 2014 crop data) and existing county land use datasets that have been collected over the last 30 years. The application also enables you to filter crop specific information and visualize land use change over time. View the SGMA Tech Talk webinar about the Land Use Viewer and how to use it.
The Well Completion Report Map Application provides direct statewide access to copies of Well Completion Reports. Well Completion Reports contain information collected by drillers during the drilling and construction of water wells, including the location, dates of construction, planned use, depth of the well, subsurface geologic units encountered, well construction, and well yield.
The Groundwater Information Center Interactive Map Application allows you to view individual Geographic Information Systems (GIS) layers containing geospatially-referenced groundwater-related information, and download these layers as GIS shapefiles or GeoTIFF raster files.
The Water Management Planning Tool is an interactive map application that allows you to overlay numerous Geographic Information Systems (GIS) layers onto a map of California. Each planning layer includes a brief description and a location or source where you can find additional information regarding that layer.
The The Groundwater Basin Boundary Assessment Tool (BBAT) is a web-based application to inform local agencies and the public about the existing Bulletin 118 groundwater basins and other relevant geologic and geographic data.
The The Disadvantaged Communities (DAC) Mapping Tool is a web-based application to assist local agencies and other interested parties in evaluating disadvantaged community (DAC) status throughout the State, using the definition provided by Proposition 84 IRWM Guidelines (2015). The DAC Mapping Tool is an interactive map application that allows users to overlay three US Census geographies as separate data layers:1) Census Place, 2) Census Tract, 3) Census Block Group.
DWR’s Modeling Support Branch of the Bay-Delta Office provides ongoing support for the (IWFM) code. IWFM is a water resources management and planning model that simulates groundwater, surface water, stream-groundwater interaction, and other components of the hydrologic system.
California Central Valley Groundwater-Surface Water Simulation Model (C2VSim)
Although the code has been used by others for model applications throughout the state, DWR's applications of IWFM are focused on California's Central Valley.The California Central Valley Groundwater-Surface Water Simulation Model (C2VSim) is an integrated numerical model that simulates water movement through the linked land surface, groundwater and surface water flow systems in California's Central Valley using the IWFM modeling platform. For more information, visit the Bay-Delta Office's C2VSim.
Sacramento Valley Simulation Model (SVSIM)
SVSim is a model of the Sacramento Valley developed on the IWFM modeling platform and based on C2VSim-FG dataset. SVSim was developed to support more detailed analysis of the stream depletion due to groundwater substitution transfers in the Sacramento Valley. It has more refined (i.e., smaller) horizontal grid network along the rivers and more discretized vertical layering. SVSim also has an updated representation of aquifer properties based on an extensive lithologic texture analysis. It is scheduled to be completed in Spring 2018.
DWR is providing data, tools, and guidance to assist GSAs with incorporating climate change into their GSPs. This effort leverages previous work done by DWR for the Water Storage Investment Program (WSIP). The anticipated release of this information is later in Fall 2017.
Statewide Groundwater Level Change Summarized by Hydrologic Region "Piemaps"
Sacramento Valley Groundwater Elevation Change
A selected list of regional reports is presented below. Additional regional reports can be found under Bulletin 118.
Additional DWR Resources
- California Water Commission
- DWR Office of Tribal Policy Advisor
- California Data Exchange Center (CDEC)
- California Irrigation Management Information System (CIMIS)
- Urban Water Use Efficiency Data (WUEdata)
State & Federal Resources
External & Local Agency Resources
- Association of California Water Agencies
- California State Association of Counties
- Water Foundation
- Water Education Foundation
- Groundwater Resources Association of California
- National Groundwater Association
- American Groundwater Trust
- UC Davis Center for Watershed Sciences
- Stanfords Water in the West Program
- Desert Research Institute - Hydrologic Sciences
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