recycled water managed aquifer recharge in · pdf filemanaged aquifer recharge in california...
TRANSCRIPT
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Recycled Water Managed Aquifer Recharge
in California
Segunda Jornada Technicas sobre la Recarga Artificial de Acuiferos
y Reuso De Agua Torre de Ingeneria, UNAM, Mexico D.F.
28 y 29 de agosto de 2013
Timothy Kevin Parker, Parker Groundwater Director, Groundwater Resources Association of California
Director, California Groundwater Coalition Director, American Ground Water Trust
Public Advisory Committee – California Water Plan Groundwater Caucus Chair - California Water Plan
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Presentation Overview
• California setting and current efforts
• Drivers for increasing recycled water use
• Recycled water policy
• Case studies – WRD & OCWD
• Summary & Conclusions
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PPIC 2011
California Setting
18,500 Mm3
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Basins with Chronic Groundwater Level
Declines
DWR Bulletin 118-75 September 1975
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USGS Professional Paper 1766
Storage Loss 60 M acre-feet/74,000 Mm3
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Water from the Water-Rich North to the
Water-Poor South Goes Through…..
The Delta (estuary)
1100 mi/1770 km of water ways 2/3 state’s drinking water
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Water from the Water-Rich North to the
Water-Poor South Goes Through…..
The Delta
In Crisis Ecology Subsidence Climate Change Earthquakes
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Water from the North to the
South Would Go Through…..
The Tunnels
• Length 30mi/48km • Three Sacramento River intakes • Capacity 9,000cfs/255m3s • Modify/optimize Clifton Forebay
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Current Significant Efforts in California
• Delta Stewardship Council and Delta Plan
• Bay Delta Conservation Plan
• California Water Plan Update 2013
• Statewide Water Action Plan
– (or “Water Vision”)
• 2014 Water Bond
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Groundwater Management Is California still the Wild West?
• Surface Water is Permitted – Groundwater is not
Regulated/Permitted • State Agency Mandates and
Policies – Mal-Aligned and Counter-
Productive – Policies Largely Contaminant
Cleanup-Based
• Fractionated Local Agency Management – Over 1,000 Local Agencies - Water
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Special Groundwater
Districts & Adjudications
PPIC 2011
• 23 adjudicated basins
• 4 special groundwater districts
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DWR PAC 2013, unpublished
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June 2012 13
106 Projects Recorded Source:
CA Dept of Water Resources
Banking and Recharge Projects in California
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Drivers for Recycled Water Use and Recharge
• Increasing demands • Climate change uncertainty • More surface water storage limited • Current major water infrastructure designed
middle of the last century based on hydrology which was ‘wet’
• Groundwater contamination growing • Groundwater reservoirs can work to help meet
the future needs • Basins need to be refilled for a non-rainy day fund
for future supply resiliency and reliability
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Recycled Water Policy
• 2009 Recycled Water Policy adopted by the State Water Resources Control Board – Increase use of recycled water
– Increase stormwater recharge
– Streamline project permitting
– Put recycled water to beneficial use
• Recycled Water Policy: develop Salt and Nutrien Management Plan (SNMP) for all groundwater basins or subbasins in California – Understand effects of salt and nutrient loading
– Manage loading to protect groundwater quality
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1. Groundwater monitoring plan 2. Goals and objectives for water
recycling and stormwater recharge
3. Salt and nutrient source characterization, assimilative capacity, loading estimates and fate & transport
4. Measures to manage loading 5. Anti-degradation analysis
SNMP Required Elements
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Recycled Water Recharge Permitting
• Permits for use of recycled water are issued by the State and Regional Water Boards
• California Department of Public Health (CDPH) establishes criteria for water recycling criteria & regulations, and makes recommendations to Water Boards per recycled water project
• Water is continuously monitored before and after treatment • Recharged water is also monitored in wells between point of
injection and water supply • Monitoring parameters include emerging constituents of concern • Water supply wells have to be located minimum distance of
– Six month travel time for water infiltrated in spreading basin – One year travel time for water injected into the aquifer – Travel time determined by tracer tests and modeling
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Brief History of Groundwater Recharge with Recycled Water in California
• 1933 - Orange County Water District – recharge Santa Ana River water
• 1960’s -Water Replenishment District of Southern
California and Los Angeles County Sanitation
• 1976 – OCWD - treating recycled water Water Factory 21
• 1991 – OCWD permitted to inject 100% recycled water
• 2005 – WRD Advanced Water Treatment Facility
• 2006 – City of Los Angeles Department of Water & Power
• 2008 – OCWD begins operation of Groundwater Replenishment System -70MGD/265,000cubic meters-day – 117B gallons produced
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Central and West Coast Basins of
Southern Los Angeles County
600,000 acre feet total water used per year
43 cities
250,000 acre feet is from groundwater (~ 40%)
Population is about 4 million
(over 10% of California’s population)
Over 400 Wells Today
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Spreading Grounds
Alamitos
Barrier
Dominguez Gap
Barrier
West
Coast
Barrier
MAR Facilities
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Facilities owned and operated by LA
County Flood Control District
Spreading
Grounds -
Built 1937 Rio Hondo
San
Gabriel Size Both Basins: 1,000 Ac/4Km
Intake Capacity: 2,850 cfs/80.7m3/s
Storage Capacity: 5,200 af/6.4 Mm3
Infiltration Rate: up to 1,200 cfs/34m3s
(2,400 afd)
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Spreading Water Sources
Rainfall per year
(54,000 af/66.6 Mm3)
Recycled Wastewater per year
(50,000 af/62 Mm3)
Imported River Water
(21,000 af/26 Mm3)
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Barrier Wells Built 1950’s
Facilities owned and
operated by LA County
Flood Control District
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Barrier Water Sources
• Potable Water per year
(10,500 af/12 Mm3)
• Advanced Treated Recycled Municipal Wastewater/year (17,500 af/21 Mm3)
Reverse Osmosis
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Goal is to be independent from imported water to replenish all of the groundwater supplies. Increase recycled and stormwater capture to replace imported.
WIN is a collection of 6 solo or partnered projects that will provide a sustainable groundwater supply.
The WIN Program will decrease demand on water from environmentally sensitive Bay Delta as well as the Colorado River.
Up to 34,000 af/42 Mm3 of imported water will be replaced by WIN. Estimated cost $200 million. Date of completion 2020.
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Orange County Water District
Established in 1933 to:
– Protect Santa Ana River flow
– Conserve water
– Manage groundwater basin – Control groundwater pumping
– Replenish basin
– Protect water quality
– Seawater intrusion
– Basin recovery projects
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OCWD recharge
facilities along
Santa Ana River.
Warner Basin in
center/background.
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River flows can be diverted with an inflatable rubber dam
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Anaheim Lake can recharge 100+ cubic feet per second when clean
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Summary & Conclusions
• California has a long, successful history of MAR, and recycled water has been used for several decades
• Due to continued losses of endangered species in the Delta system, less water is available, and recycled water is being used more
• State policy and regulations – Increase use of recycled water – Maintain salt and nutrient balance in basins
• Regional Interdependence Will Work – less reliant on imported water through recycled water,
stormwater capture and increasing conservation, public outreach and education
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End
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References
• Groundwater Availability of the Central Valley Aquifer – USGS Professional Paper 1766
• Managing California’s Water: From Conflict to Reconciliation – Public Policy Insitute
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Websites
• http://www.waterplan.water.ca.gov/cwpu2013 • http://baydeltaconservationplan.com/Home.aspx • http://deltacouncil.ca.gov/ • http://ballotpedia.org/wiki/index.php/California_Water_Bond_%28
2014%29 • http://www.leginfo.ca.gov • http://www.ocwd.com • http://www.wrd.org • http://www.grac.org • http://www.ppic.org • http://ballotpedia.org/wiki/index.php/California_Water_Bond_%28
2014%29 • http://ca.water.usgs.gov/projects/central-valley/central-valley-
hydrologic-model.html
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Recycled Water Managed Aquifer Recharge
in California
Segunda Jornada Technicas sobre la Recarga Artificial de Acuiferos
y Reuso De Agua Torre de Ingeneria, UNAM, Mexico D.F.
28 y 29 de agosto de 2013
Tim Parker, Parker Groundwater Director, Groundwater Resources Association of California
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DWR Bulletin 118-80 January 1980