potential use of aquifer storage (and recovery) as a tool for
TRANSCRIPT
Potential Use of Aquifer Storage
(and Recovery) as a Tool for
Stormwater Management and
Stream Restoration
Jason Melady, RG, CWRE, Senior Hydrogeologist
GSI Water Solutions
GSI WATER SOLUTIONSPORTLAND, OR – KENNEWICK, WA – CORVALLIS, OR – BEND, OR – SANTA BARBARA, CA
www.gsiwatersolutions.com
Overview
► What is ASR?
► Alternative ASR Concepts
► Feasibility Considerations
► Example Projects
What is ASR?
What is ASR?
What is ASR?
What is ASR?
What is ASR?
What is ASR?
City of Beaverton Water Supply
Beaverton’s ASR Program
ASR Initiated in 1999
3 ASR wells – approximately 500 feet deep
Storage aquifer: Columbia River Basalt Group (CRBG) - Upper Grande Ronde Basalt
Source water: Treated drinking water
Storage target: 450 million gallons per year
ASR peak supply of 6 million gallons per day (4,200 gallons per minute)
Represents 35% of summer-time peak supply
Recharged and recovered 3.6 billion gallons since 1999
Beaverton ASR Wells
ASR
#1
ASR
#2
ASR
#4
Beaverton ASR SummaryASR Storage target: 450 MG per year
Typically 1 Million Gallon
www.oregonlive.com
Less than 50 Million Gallon
450 Million Gallon Reservoir
Madison Ranches
What is ASR?
Madison Ranches
► 17,000 acre agricultural-farm in eastern Oregon.
► Crops of corn, canola, potatoes, alfalfa, ryegrass,
and wheat.
► Intense groundwater development in the area
has over-drafted the basalt aquifer (500 foot
decline).
► Critical Groundwater Area Declaration by OWRD
in 1990 and curtailed groundwater use.
Madison Ranches
► ASR feasibility assessed in 1993 and initiated in
2006
► 1 ASR Well (1960)– approximately 700 ft deep
► Storage aquifer: Columbia River Basalt Group
► ASR Source water: Seasonally available alluvial
groundwater
► Storage volume: Up to 170 million gallons – more
possible
► Recharge and recovery rate: 1.6 million gallons
per day (1,100 gallons per minute)
Madison Ranches
Madison Ranches
Madison Ranches
GSI Water Solutions
ASR Lessons Learned
12 active ASR projects in Oregon
ASR is capable of storing large quantities of water for
drinking water and irrigation – 1,000’s gpm and 100’s of
million gallons
Columbia River Basalt Group (CRBG) is an excellent
target aquifer for storage
No negative water quality observations during storage
Recovered water retains quality of recharge water
with some mixing near end of recovery
ASR typically very cost effective relative to other
storage options
Alternative ASR Concepts
Alternative ASR ConceptsThermal Storage and Recovery
Warm noncontact cooling water
storage in summer, recovered for
HVAC in winter
Cold surface water stored in
winter for cooling purposes in the
summer
ASR for Streamflow Enhancement
Cold surface water/alluvial groundwater stored in winter
Recovered in the summer to
increase streamflow and reduce
stream temperature
Alternative ASR ConceptsASR for Water Quality (Temperature)
Mitigation
Cold surface/alluvial groundwater
water stored in winter
Stored water recovered in summer
for blending with effluent or
mitigation
ASR for Stormwater Management
Stormwater stored in winter
Recovered in the summer to use
for irrigation or streamflow
enhancement/mitigation
Temperature Mitigation ASR Concept
Stormwater Recharge Concept
Feasibility Considerations
Feasibility ConsiderationsTemperature Mitigation Concept
Physical Feasibility
Source Water Quality and Quantity
Alluvial groundwater/surface water
Temperature
Groundwater Storage Reservoir
Aquifer capacity
Transmissivity
Static water level
Water quality
Mixing assessment - temperature
Recovered Water Quality
Temperature
Other constituents
Feasibility ConsiderationsTemperature Mitigation Concept
Regulatory Feasibility
Water Rights
Source water
Winter groundwater/surface water
Storage
AR/ASR License – OWRD
UIC - DEQ
Water Quality
Drinking water standards
Surface water treatment
Turbidity – well clogging
Recovery and discharge
Integrated in NPDES permit
Feasibility ConsiderationsStormwater Recharge Concept
Physical Feasibility
Source Water Quality and Quantity
Stormwater
Groundwater Storage Reservoir
Aquifer capacity
Transmissivity
Static water level
Water quality
Mixing assessment
Recovered Water Quality
Temperature
Other constituents
Feasibility ConsiderationsStormwater Recharge Concept
Regulatory Feasibility
Water Rights
Precipitation from impervious
surface is exempt use – no water
right required
Storage
AR/ASR License – OWRD
UIC - DEQ
Water Quality
Determine beneficial use of storage
aquifer-usually drinking water.
Use local stormwater water quality
data with similar land use to assess
potential stormwater quality for
recharge.
Feasibility ConsiderationsStormwater Recharge Concept
Regulatory Feasibility (Continued)
Water Quality (Continued)
Ideal horizontal setbacks – 2-year
time of travel or 500 feet.
Fate and transport modeling to
develop site specific action levels
protective of nearest compliance
point.
If necessary, assess pre-treatment
to meet action levels.
Recovery and discharge
Integrated in NPDES/MS4 permit if
discharged
Use for irrigation based on ASR
license
Example Projects
Aquifer Recharge - Stormwater
Sonoma County, CA
Naples, FL
Australia
SummaryTemperature Mitigation and
Stormwater Recharge ASR Concepts
Utilize storage to offset impact of
wastewater and stormwater
discharge to surface water
Reallocates either a portion of the
surface water (temperature
mitigation) or a portion of the
discharge (stormwater)
Use of ASR has been successful
where geologic conditions are
favorable and has been cost
beneficial
Should be considered for
wastewater and stormwater
management
Questions?