Mixing in an aquifer

Chemicals leaching through soils to groundwater mix with water already present there. The change in concentration of the chemical depends upon the concentration of the solution entering the aquifer(the inflow concentration), the rate at which the solution is entering the aquifer (the recharge rate), the initial concentration of water in the aquifer (the initial concentration), and the amount of water in the aquifer (the product of the porosity and thickness of the aquifer). The applet below allows you to modify these parameters and to see the aquifer concentration as a function of time as well as the total time required to reach a critical concentration.  The applet is based on a simplified aquifer system.

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Last Modified: October 22, 1999.