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South East Bay Plain Basin Groundwater Model Enhancements

Project URL link
Sponsoring Agency EBMUD
Subregions ('East Bay',)
Counties Alameda
Watershed Tributary NA
Public or private land? ('Public', 'Private')
Location (lat/lon) 37.70840549,-122.182388306
Start Date 01/02/2017
End Date 06/30/2017
Location Description South East Bay Plain Groundwater Basin (located in the south western portion of EBMUD's service area)
South East Bay Plain Basin Groundwater Model Enhancements

An existing groundwater model of the South East Bay Plain Groundwater Basin will be expanded to include a water quality / contaiminant transport component.

A groundwater model has been developed as part of the South East Bay Plain Basin Groundwater Management Plan.  The model is used to predict the behavoir of the Basin under various groundwater injection and extraction scenarios (more specifically, to predict water level fluctations in the basin and further to estimate the safe yeild of the basin under various extraction scenarios as could be proposed by the multiple basin stakeholders in the years ahead). 

Although a relatively new model, the model is seen as a tool that can be continually expanded upon.  As part of this effort, the model will be added to such that water quality issues can be reviewed.  For example, contaminant plume modeling, etc.

Drinking Water Supply
Water Quality Improvement
Water Reuse/Recycling
Stormwater Improvements
Groundwater Benefits
Habitat Protection and Restoration
Flood Protection
Having an expanded tool in place to model basin water quality matters will serve beneficial as part of the overall effective management of the groundwater basin.
If there are locations within the groundwater basin where contaminantion, should it occur, would travel rapidly throughout the basin, such information can be made available to local land use planners and aide in their decision-making when and if manufacturing / industry proposes to operate in certain locations.
If there is a particular groundwater contamination concern within a disadvantaged community, this model would prove as an added tool toward addressing how best to mitigate and/or address said contaminant clean up.

Part 2 - Detail

This project involves augmenting an existing groundwater model as crafted in 2011 for the South East Bay Plain Basin Groundwater Management Plan (SEBP Basin GMP) such that the model also allows for water quality evaluation and analysis.



The SEBP Basin GMP is a multi-stakeholder effort involving a number of Alameda County agencies / organizations

South East Bay Plain Basin Groundwater Management Plan, EBMUD (anticipated completion date = January 2013)

South East Bay Plain Groundwater Basin (Alameda County)

The SEBP Basin serves as a water source for EBMUD and the City of Hayward.  It also serves as a raw water source for other entities in the basin for use as a means to irrigate lands. As identified in the GMP, there is an interest in being able to model the pathways of contaminant plumes (future contaminants, should they occur, and existing known sources of contaminants).  Updating the groundwater model as prepared for the basin to allow such analysis would prove highly useful / beneficial for multiple uses such as EBMUD, the City of Hayward, etc.

Should the model not be updated, quickly predicting the pathway(s) of contamination would not be possible.  This could prove highly problematic as more and more users rely on the basin to meet their various water supply needs.

i. Water Supply (conservation, recycled water, groundwater recharge, surface storage, etc.)


ii. Water Quality


Updating the existing SEBP Basin Groundwater Model to allow for contaminant transport prediction will ultimately help users better manage (protect, insure the sustainability of, etc.) Basin Water Quality.

iii. Flood and Stormwater Management


iv. Resource Stewardship (watershed management, habitat protection and restoration, recreation, open space, etc.)


Increases Water Supply Reliability
Advances/ Expands Conjunctive Management of Multiple Water Supply Sources
Increases Water Use and/or Reuse Efficiency
Provides Additional Water Supply
Promotes Water Quality Protection
Reduces Water Demand
Advances/Expands Water Recycling
Promotes Urban Runoff Reuse
Addresses Sea Level Rise
Addresses other Anticipated Climate Change Impact (e.g. through water management system modifications)
Improves Flood Control (e.g. through wetlands restoration, management, protection)
Promotes Habitat Protection
Establishes Migration Corridors
Re-establishes River-Floodplain Hydrologic Continuity
Re-introduces Anadromous Fish Populations to Upper Watersheds
Enhances and Protects Upper Watershed Forests and Meadow Systems
Other (Please Describe)
Increases Water Use Efficiency or Promotes Energy-Efficient Water Demand Reduction
Improves Water System Energy Efficiency
Advances/Expands Water Recycling
Promotes Urban Runoff Reuse
Promotes Use of Renewable Energy Sources
Contributes to Carbon Sequestration (e.g. through vegetation growth)
Other (Please Describe)
$75,000(low) - $200,000(high)
Drought Preparedness
Use and Reuse Water More Efficiently
Climate Change Response Actions (Adaptation to Climate Change, Reduction of Greenhouse Gas Emissions, Reduce Energy Consumption)
Expand Environmental Stewardship
Practice Integrated Flood Management
Protect Surface and Groundwater Quality
Improve Tribal Water and Natural Resources
Ensure Equitable Distribution of Benefits
Reduce Reliance on the Bay-Delta
Reduce Water Demand
Improved Operational Efficiency and Transfers
Increase Water Supply
Improve Water Quality
Improve Flood Management
Practice Resources Stewardship
Other Strategies (Please Describe)
Groundwater Management Plan
Urban Water Management Plan
Water Meter Requirements
Groundwater Monitoring Requirements
AB 1420 Compliance
BMP Compliance
CEQA Compliance
Water supply reliability, water conservation and water use efficiency
Stormwater capture, storage, clean-up, treatment, and management
Removal of invasive non-native species, the creation and enhancement of wetlands, and the acquisition, protection, and restoration of open space and watershed lands
Non-point source pollution reduction, management and monitoring
Groundwater recharge and management projects
Contaminant and salt removal through reclamation, desalting, and other treatment technologies and conveyance of reclaimed water for distribution to users
Water banking, exchange, reclamation and improvement of water quality
Planning and implementation of multipurpose flood management programs
Watershed protection and management
Drinking water treatment and distribution
Ecosystem and fisheries restoration and protection
Reduced Reliance on the Bay-Delta
Projects that directly address a critical water quality or supply issue in a DAC
Urban water suppliers implementing certain BMPs as on page 17 of Guidelines
Be designed to manage stormwater runoff to reduce flood damage (PRC §5096.827)
Be consistent with the applicable Regional Water Quality Control Plans (Basin Plans) (PRC §5096.827)
Not be a part of the State Plan of Flood Control (SPFC) (PRC §5096.827)

Development of an expanded groundwater model for the South East Bay Plain Groundwater Basin to include water quality analysis would serve as an added tool serving as an overall Basin protection strategy. 

If contamination occurs, the model can be used to quickly predict the pathway(s) of contaminants and assess clean up and mitigation strategies.  It could also be used to help land planners assess areas within the basin that where certain type(s) of development / industries should be limited. 

Project team

Part 3 - Benefits