MIL-HDBK-1005/16
to meet irrigation or other demands. With ASR technology, the
water is stored in the subsurface to be used at a later date.
Possible ASR applications include storing and recovering water to
meet diurnal variations in supply and demands, banking reclaimed
water to meet demands during extended drought periods or when the
quality of the water is not acceptable for the reuse application,
or strategically locating the ASR system in locations where flow
or pressure constraints are inherent in the reuse system. The
reclaimed water stored in an ASR system could be blended with
brackish water resources under certain applications to maximize
the use of freshwater and brackish water in an area with limited
water resources. Additional aquifer treatment could occur under
certain hydrogeologic conditions which may enhance reclaimed
water quality. Advanced treatment of the stored or recovered
water could allow a wide range of applications, including
indirect potable reuse with treatment of the water to drinking
water standards. Under most applications, ASR provides
additional reliability and operational flexibility for the
overall reuse system.
9.4.2
General Design Guidance. See par. 9.3.1.2 for
pertinent information concerning design of ASR wells.
a) Design of ASR wells differ from typical effluent
disposal wells in several areas:
(1) ASR wells are typically shallower than
disposal wells, completed in a less saline receiving zone.
(2) ASR wells are designed to maximize storage
and recovery versus maximizing disposal capacity.
(3) Confinement to prevent fluid movement is not
typically as stringent since reclaimed water quality is generally
very good and, because of the mode of operation (recharge and
recovery), fewer areas are typically affected.
(4) ASR wells require installation of a pump and
motor in the well since they are operated as a "production well"
during recovery periods.
(5) A small aboveground storage facility may be
required for an ASR system to meet diurnal variations in
reclaimed water demands.
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