California Aqueduct Subsidence February 10, 2020 2 California - - PowerPoint PPT Presentation

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Aug 18, 2023 28 likes •141 views

C A L I F O R N I A D E P A R T M E N T O F W A T E R R E S O U R C E S California Aqueduct Subsidence February 10, 2020 2 California Aqueduct Supplies water to 27 million people and 750,000 acres of farmland Up to 3 feet of

SLIDE 1

C A L I F O R N I A D E P A R T M E N T O F W A T E R R E S O U R C E S

California Aqueduct Subsidence February 10, 2020

SLIDE 2

Supplies water to 27

million people and 750,000 acres of farmland

Up to 3 feet of subsidence

during recent drought

Subsidence projected to

continue if no action is taken

California Aqueduct

SLIDE 3

Extent of Subsidence

SLIDE 4

Recent DWR Studies

Subsidence due to deep groundwater

pumping

Over 2 feet of subsidence from recent

drought can not be recovered

Transition from annual to perennial crops
Aqueduct capacity reduced by 20% in

some locations

Reduced Aqueduct operational flexibility

SLIDE 5

Impacts on the Aqueduct

Decreased delivery capacity
Increased cost to deliver water
Decreased system reliability
Increased operations and

maintenance

SLIDE 6

Impacts – Damaged Liner

SLIDE 7

Impacts – Subsided Gate

SLIDE 8

Restore delivery capacity for reliable

water delivery

Restore operational flexibility
Long-term infrastructure resiliency
Affordability
Pursue supplemental funding

Key Considerations

SLIDE 9

Sustainable Groundwater Management Act

Engage with sustainable

groundwater agencies and

thers
Protect the Aqueduct from

further damage

SLIDE 10

What’s Next?

Near-term Efforts

Raise portions of the Aqueduct
Repair siphons and gate

structures

Raise bridges over Aqueduct

Long-term Efforts

Conduct feasibility study
Plan, design, and implement

enduring repairs to the Aqueduct

SLIDE 11