The sub surface aquifers can act as a buffer capacity for drinking water and irrigation purposes. The aquifers can have a certain impact in areas where surface water aquifers are used as storage of water for irrigation purposes.
Processes that inhibit pH changes in an aquifer are called pH buffering processes and are important because pH is often a key control in the chemical and microbiological processes responsible for contaminant remediation. This happens when the aquifer buffer capacity is sufficient to counteract pH changes resulting from contaminants entering the aquifer and/or in situ remediation processes. Buffering capacity can occur naturally or by modifications in the groundwater system.