Alternate Water Sources (Aquifer Storage and Recovery [ASR])

Aquifer storage and recovery (ASR) is the process of injecting water from the surface into a suitable underground aquifer for storage and re-supply. One of the advantages of ASR is that it can be used to store large volumes of water from wet periods (e.g. storm events) which can be stored with very little evaporation and can then be used at another time of the year when water is scarce. It is a suitable technology for urban environments where surface storage is limited, and demand is seasonal. ASR is likely to become a more common alternative source water supply in future.