city of san diego’s energy effi ifficiency water...
TRANSCRIPT
PresentationtothePresentation to the
Western Sustainability and Pollution Prevention Network Conference ‐October 28, 2010
City of San Diego’s ffi i &Energy Efficiency &
Water ConservationWater Conservation
C thl C Pi iCathleen C. PieroniPublic Utilities Department Long‐Range Planning & Water Resources Division
San Diego Water SystemSan Diego Water System
• 1.3 million people
• 404 Square Miles
• Avg. Daily Consumption more than 200 MGD
• 9 Raw Water Reservoirs
• 3 Water Treatment Plants
More than 3 000 Miles of• More than 3,000 Miles of Pipelines
• 27 Distribution Reservoirs/StandpipesReservoirs/Standpipes
• 50 Pump Stations
• More than 110 Pressure Zones
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San Diego Wastewater SystemSan Diego Wastewater SystemMetropolitan System
• 2.2 million people
• 450 square miles
• City of SD &15 Participating
agencies
• Approximately 180 MGD
• Point Loma WWTP• Point Loma WWTP
• Metro Biosolids Center
• 4 Major Pump Stations
Municipal Collection System• 1.3 million people
• 330 square miles
3
q
• 3,000 miles sewer lines
• 83 pump stations
City of San Diego’s Water SupplyCity of San Diego s Water Supply
Source: City of SD Public Utilities Department 8/16/10
Average (2005-2010)
Estimated energy intensity of water in San Diego CountySan Diego County
• Relationship of water to energy, broken downp gy,
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ISO 14001 CertifiedISO 14001 Certified
W t S t
• Increased Employee Awareness
12% 6%
Water System Operations Energy
Awareness• Saving Natural Resources• Reducing Environmental 80%
6%1%
gFootprint
• Reducing CostsPump Stations
Filtration Plants
Buildings
Misc
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San Diego Keeps GrowingBy 2030 San Diego may need 11% more water
San Diego Keeps Growing
2030: 275,925acre-feet per year
2007 248 0002007: 248,000 acre-feet per year
The Climate CycleThe Climate CycleGlobal Climate ChangeRegulatory
FocusPlanning Focus
GHG Emissions Regional Impacts
ationAdap
Natural SourcesAnthropogenic
Sources Natural Systems Human Systems
Mitiga
ptationPrimary Contribution Sectors Primary Impact Sectors
Transportation Industry Electric Power Water Resources
Environment
Coastal Zones
Agriculture
14Drivers
Adaptation: Local Water SuppliesAdaptation: Local Water Supplies
• Water Conservation• Local Runoff ‐ Reservoirs• Recycled Water• Brackish Groundwater desalination• Groundwater Conjunctive Use• Seawater Desalination (San Diego Region)• On‐site alternatives:
– Greywater– Stormwater capture
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San Diego is ConservingSan Diego is Conserving
1600300000
1200
1400
1600
250000
300000
Demand (AF)
Reduced Water Demand
et
800
1000
150000
200000
ula
tion
x
1000
nd
in A
cre-
fee
400
600
50000
100000 Pop
u 1
Wat
er D
eman
0
200
0
50000
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Fiscal Year
SavingWater in Commercial SettingsSaving Water in Commercial Settings
JoEllenJacobyJoEllen Jacoby
San Diego Public Utilities Department
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Commercial Landscape Survey ProgramSurvey Program
Uses Water Resources Landscape Database (WRLD) water budget
Measures commercial landscaping using aerial photographs &aerial photographs & geo-graphic information systems
Records irrigation water budget on water billbill
Creation of the CLSPCreation of the CLSPBegun summer 2002g1800+ budgets prepared2,402 acres surveyed (including mixed meter sites)785,646 H.C.F. potential water savings
CLSP - Site VisitCLSP - Site VisitIrrigation specialist walks site with g pknowledgeable landscape maintenance personnel:
id ifi h l d h i i didentifies the landscape area that is serviced by each meterchecks water pressure at the backflowchecks water pressure at the backflow
CLSP – Site VisitCLSP Site Visitnotes broken/missing equipment and mismatched headsmismatched heads notes over‐spray and poor coveragenotes blocked spray heads and inadequatenotes blocked spray heads and inadequate clearanceidentifies mixed plant material on the same valve
CLSP – Site VisitCLSP Site Visitchecks for mulch coveragegdiscusses irrigation scheduleperforms one or more catch can test checks pressure at various irrigation heads
CLSP - Back in the OfficeCLSP Back in the OfficeIrrigation specialist prepares a report:
using satellite imagery the landscape area canusing satellite imagery the landscape area can be identified as grass, shrubs and groundcover, native plant material or hardscape
CLSP Report PreparationCLSP Report PreparationAnnual water requirement is determined per
b dmeter based on:crop coefficientdistribution uniformitydistribution uniformityevapotranspiration (regionally based)area measurearea measure
Post Survey ResultsPost Survey ResultsSurveys completed in 2005 attained water y psavings of: (14 sample size)
‐6% in 2006‐9% in 2007‐19% in 2008
Grass replacement rebate
•Rebate for Rotator nozzles•Rebate for micro-spray, dripRebate for micro spray, drip and inline drip hose
Water Saving DevicesWater Saving Devices
Water Brooms• Water Brooms• Cooling Tower upgrades
• Possibly connect to recycled water
• Toilets• FlushometersFlushometers• High Efficiency• Urinals
Connectionless Food• Connectionless Food Steamers
• Air cooled Ice machines