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A-11 | Groundwater Sustainability Plan for the Yucaipa Basin Area | San Bernardino Valley Municipal Water District
Usable Capacity & Safe Yield for the Yucaipa Recycled Water Use Evaluation Using the
Basin | San Bernardino Valley Municipal Gateway Subbasin Focused Groundwater
Water District Model | Yucaipa Valley Water District
Mr. Robert Tincher, PE, Manager of Engineering & Mr. Joseph Zoba, General Manager |
Planning | (909) 387-9215 | bobt@sbvmwd.com (909) 797-5117 | jzoba@yvwd.dst.ca.us
Geoscience helped determine both the usable Geoscience evaluated the effect of recycled
capacity and the maximum sustainable yield for water recharge in the Wilson Creek Spreading
a series of groundwater sub-basins within the Basin located within the Gateway Subbasin.
Yucaipa Basin area. The first stage of the project Geoscience developed a subbasin focused
included background research data collection groundwater model to assess recycled water
and review. Then a layered base map to visually travel times the nearest production well, and
display project results was developed. Once the estimated the percentage of recycled water that
base map was developed, previously delineated would be produced by the wells. They developed
subbasin boundaries were reevaluated in light the model using existing data collected from
of more recent geologic data. previous work in the basin. The model also
assessed geologic conditions, and was used to
After this step, the local geology and hydrology evaluate multiple recharge scenarios.
were characterized faults and their impact
on groundwater. The usable storage capacity Staff assigned: Johnson Yeh, Brian Villalobos, Kapo
of each newly-delineated subbasin was then Coulibaly, Leo Liu
determined and sustainable yields were
calculated for each subbasin using a water Relevance to Project:
balance technique. At the conclusion of
the project, Geoscience prepared a report • Study was conducted within the Yucaipa
containing the project’s results, which was Groundwater Basin
presented to basin stakeholders during project • Leveraged existing data collected from
meetings. previous work to develop the model using
Staff assigned: Johnson Yeh, Brian Villalobos, Kapo MODFLOW
Coulibaly, Leo Liu • Conducted a hydrogeological characterization
Relevance to Project:
• Ability to utilize existing data to expedite and
streamline the development of the GSP and reduce
cost and schedule
• Completed the Sustainable Yield and Water Budget
which are the same components required in a GSP
• Completed the Yucaipa Basin geologic
characterization and can utilize that information
Yucaipa Sustainable Groundwater Management Agency - August 9, 2018 - Page 30 of 208
