Water Resources - IMPACT - September 2017 - 9

W

Aquifer storage and recovery is defined
as the injection of water at a given site, and
recovery from the same site. The concept
has been to take advantage of excess water
during certain times of the year, store that
water and retrieve it at a later point in time
when it is needed. Two benefits result - first,
water supplies that might otherwise be
lost can be captured for public water use,
and second, water treatment plants in high
peak demand locations may not have to be
constructed for peak days - the peaks can be
shaved with ASR well recovery.
The first ASR site was constructed and
tested nearly 50 years ago. Since that time,
over 200 sites in 27 states have investigated
the concept of ASR (see Figure 1). For the
most part, utilities have pursued injection
of treated, potable water with the intent of
recovering this same water for pumping
directly into the distribution system. In
many cases, only disinfection is required.
Many of these systems were groundwater
supplies, however, the more recent projects
have been reclaimed water and untreated
raw surface water. All of the nine operating
South Carolina ASR systems use surface
water that is treated and successfully
injected into an old aquifer production zone
that was overpumped from 1970s to 1990s
and recovered for peak conditions in the
summer. In some cases the same wells are
25
being used.
Florida has been a leader in advancing
ASR science; the state still has over 25%
20
of the sites. Sites include injection of
groundwater, raw surface water and
reclaimed water, and include sites injecting
into fresh and brackish formations. Many
15
have been successful projects, operating for
20 years. More recent projects have used
raw water supplies and reclaimed water for
injection. South Carolina, California, New
10
Jersey, Arizona, Nevada and Oregon have
been very active with ASR for years.
At present, 35% of the 204 sites are
5
currently active and another 20% appear
to be inactive at present (for various
reasons), with the rest in the planning or
testing stage. In a few cases the project has
0
been abandoned or converted to other use
FL NJ CA OR AZ SC TX NV WA IA CO DE KS NC VA WI WY UT GA ID IL OK NY MNNM SD TN
(several in California and the Florida Keys
State
were converted; two others in Florida were
plugged and abandoned). Ongoing projects
Figure 1: Location of ASR wells by state.

Number of ASR Well Sites

ithin the 21st century, many utilities will experience
conflicts over water supplies to their customers. The
competition will come from upstream of co-located
agriculture, power and natural systems. To
compound the situation, the most significant competition for water
supplies according to United States Geological Survey (USGS),
is in areas where people are moving - the south and southwest
(the latter of which is more arid than the northeast and midwest).
Agriculture has been using groundwater and surface water in the
west for over 70 years, and aquifer levels have dropped significantly
in many of those same areas due to low precipitation and deep
aquifer formations. Climate variability, the loss of snowpack storage
and earlier snowmelts are challenges not anticipated 20 years ago
by many established utilities. Variation in water supplies throughout
the year complicates the situation - for the most part the highest
demand periods occur when the precipitation is least in the areas
where people live or are moving. These challenges have made water
utilities consider options for managing their water supplies. One
option that has been explored is aquifer storage and recovery (ASR),
one option for managed aquifer recharge.

Volume 19 * Number 5 www.awra.org * 9


http://www.awra.org

Table of Contents for the Digital Edition of Water Resources - IMPACT - September 2017

President’s Message
Growing Up…with Managed Aquifer Recharge
Aquifer Storage and Recovery as Means to
The Regulatory Environment of Managed
The ASCE-EWRI Standard Guidelines
Managed Aquifer Recharge:
Managed Aquifer Recharge: A Global Perspective
What’s Up with Water? Sisyphus, Heraclitus and WOTUS
The New Economics of Water: Reducing CO2 Emissions in the Bay Delta Could Reverse Erosion
Domestic Well Aquifer Storage and Recovery Using Seasonal Springs
Philosophy and Ethics: The Rio Grande and the Ganges Rivers: How Human ‘Success’ is Choking the Life out of Two Great River-Spirits
ASR: Aquifer Storage Rescues a Small Water Supply District
Putting Aquifers to Work: MAR Applications in Nutrient Removal
Summer Conference Recap
Harvesting Glacial Meltwater with Managed Aquifer Recharge
AWRA State Section and Student Chapter News
In Memoriam: Peter E. Black
Herbert Scholarship Award Recipients for 2017-2018 Announced
August JAWRA Highlights
2017-2018 Editorial Calendar
Water Resources - IMPACT - September 2017 - intro
Water Resources - IMPACT - September 2017 - cover1
Water Resources - IMPACT - September 2017 - cover2
Water Resources - IMPACT - September 2017 - 3
Water Resources - IMPACT - September 2017 - 4
Water Resources - IMPACT - September 2017 - President’s Message
Water Resources - IMPACT - September 2017 - Growing Up…with Managed Aquifer Recharge
Water Resources - IMPACT - September 2017 - 7
Water Resources - IMPACT - September 2017 - Aquifer Storage and Recovery as Means to
Water Resources - IMPACT - September 2017 - 9
Water Resources - IMPACT - September 2017 - 10
Water Resources - IMPACT - September 2017 - The Regulatory Environment of Managed
Water Resources - IMPACT - September 2017 - 12
Water Resources - IMPACT - September 2017 - 13
Water Resources - IMPACT - September 2017 - The ASCE-EWRI Standard Guidelines
Water Resources - IMPACT - September 2017 - 15
Water Resources - IMPACT - September 2017 - 16
Water Resources - IMPACT - September 2017 - Managed Aquifer Recharge:
Water Resources - IMPACT - September 2017 - 18
Water Resources - IMPACT - September 2017 - 19
Water Resources - IMPACT - September 2017 - Managed Aquifer Recharge: A Global Perspective
Water Resources - IMPACT - September 2017 - 21
Water Resources - IMPACT - September 2017 - 22
Water Resources - IMPACT - September 2017 - 23
Water Resources - IMPACT - September 2017 - 24
Water Resources - IMPACT - September 2017 - 25
Water Resources - IMPACT - September 2017 - 26
Water Resources - IMPACT - September 2017 - 27
Water Resources - IMPACT - September 2017 - 28
Water Resources - IMPACT - September 2017 - 29
Water Resources - IMPACT - September 2017 - What’s Up with Water? Sisyphus, Heraclitus and WOTUS
Water Resources - IMPACT - September 2017 - 31
Water Resources - IMPACT - September 2017 - The New Economics of Water: Reducing CO2 Emissions in the Bay Delta Could Reverse Erosion
Water Resources - IMPACT - September 2017 - Philosophy and Ethics: The Rio Grande and the Ganges Rivers: How Human ‘Success’ is Choking the Life out of Two Great River-Spirits
Water Resources - IMPACT - September 2017 - ASR: Aquifer Storage Rescues a Small Water Supply District
Water Resources - IMPACT - September 2017 - 35
Water Resources - IMPACT - September 2017 - Summer Conference Recap
Water Resources - IMPACT - September 2017 - 37
Water Resources - IMPACT - September 2017 - AWRA State Section and Student Chapter News
Water Resources - IMPACT - September 2017 - In Memoriam: Peter E. Black
Water Resources - IMPACT - September 2017 - Herbert Scholarship Award Recipients for 2017-2018 Announced
Water Resources - IMPACT - September 2017 - 41
Water Resources - IMPACT - September 2017 - 2017-2018 Editorial Calendar
Water Resources - IMPACT - September 2017 - cover3
Water Resources - IMPACT - September 2017 - cover4
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