Flood Management in Los Angeles County · Water Conservation and Flood Control Challenges The...
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Flood Management in Los Angeles County October 28, 2015
Transcript of Flood Management in Los Angeles County · Water Conservation and Flood Control Challenges The...
Flood Management in Los Angeles County
October 28, 2015
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Public WorksCore Service Areas
Public Buildings
Water Resources
Waste Management
TransportationDevelopment
ServicesEmergency
Management
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Preparing for El Nino
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Preparing for El Nino
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Preparing for El Nino
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Pre-Storm Coordination Activities
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Available Resources� C.A.R.E.: Coordinated Agency Recovery Effort (dpw.lacounty.gov/care)
� Alert L.A. County
� DPW 24-hour Dispatch: (800) 675 – HELP (4357)
� dpw.lacounty.gov/contact/
� Twitter: @dpwCARE @LAPublicWorks
� Los Angeles County – The Works smart phone app
� https://www.lacounty.gov/elnino
� 911 for Emergencies
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LA Region’s Sources of Water
2/3 Imported
1/3 Local
� Groundwater
� Local Surface
� Reclaimed
Groundwater Recharge
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Dams/Reservoirs1Spreading Grounds2
Natural Bottom Channels3
Rubber Dams4
Morris Dam
Major Dams and Reservoirs
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Hansen Spreading Grounds
Spreading Grounds
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Soft Bottom Channels and Rubber Dams
San Gabriel River
0
100,000
200,000
300,000
400,000
500,000
600,000
700,000
800,000
VO
L C
ON
SE
RV
ED
(A
C-F
T)
WATER YEAR (Oct – Sept)
Stormwater Imported Recycled
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Flood Control District Groundwater Recharge
Avg Yearly
Conservation
310,000 ac-ft**
*Preliminary numbers, to date
**Since 2000. Does not include 25,000 ac-ft/year for seawater barrier operation 14
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Water Conservation and Flood Control Challenges
� The Sediment Management
challenge threatens local water
conservation and storage facilities
� 8 million cubic yards to be removed
from Devil’s Gate, Big Tujunga, and
Pacoima Reservoirs over the next
7 – 10 years
Pickens Debris Basin – 2009-10 Storm Season
La Canada Flintridge, January 2010
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Infrastructure Investments
Big Tujunga Dam
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Los Angeles Basin Stormwater Conservation Study
Objectives
1) Evaluate EXISTING water conservation
under FUTURE conditions
2) Evaluate POTENTIAL NEW facilities &
operational changes for climate change
Population GrowthPopulation GrowthPopulation GrowthPopulation Growth
keykeykeykeyClimate ChangeClimate ChangeClimate ChangeClimate Change
concernsconcernsconcernsconcerns
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Basin Study: Initial Findings
Pro
ject
ed
Wa
ter
Su
pp
ly 2
09
5
0
500,000
1,000,000
1,500,000
2,000,000
2,500,000
8.5
9
9.5
10
10.5
11
11.5
12
2010 2035 2095
Po
pu
lati
on
( M
illi
on
s)
Population Water Demand
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Multi-Benefit Case Study: Sun Valley Watershed Proj ect
� Flood Protection
� Water Quality
� Water Conservation
� Recreation
� Habitat
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Multi-benefit Project: Sun Valley Park
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Multi-benefit Project: Rory M. Shaw Wetlands
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Pilot Study:
Distributed Stormwater Capture System on Residentia l Parcels
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Water Energy Nexus (GHG Reductions):
Imported vs Stormwater
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� Well Prepared for Flood Management
� Investing in Stormwater for Local Sustainability
� Integrated, Collaborative Planning
Summary
