Percolation is the process by which water moves downward through the soil and into an aquifer.

Artesian aquifers are a type of confined aquifer, not a separate type.

Hydraulic conductivity is a measure of the ease with which water can flow through an aquifer.

Evaporation is a process that removes water from an aquifer, not a factor that affects its recharge.

Storativity is a measure of the amount of water that an aquifer can store per unit volume.

Natural attenuation is a process that removes contaminants from groundwater, not a type of contamination.

Remediation is a general term for the process of removing contaminants from groundwater.

Natural attenuation is a process that removes contaminants from groundwater naturally, not a method of remediation.

Bioremediation is a process that uses microorganisms to remove contaminants from groundwater.

Natural attenuation is a process that removes contaminants from groundwater naturally, not a type of bioremediation.

Phytoremediation is a process that uses plants to remove contaminants from groundwater.

Natural attenuation is a process that removes contaminants from groundwater naturally, not a type of phytoremediation.

In-situ chemical oxidation is a process that uses in-situ chemical reactions to remove contaminants from groundwater.

Natural attenuation is a process that removes contaminants from groundwater naturally, not a type of in-situ chemical oxidation.

Pump-and-treat is a process that uses a pump to remove contaminants from groundwater.