Valparaiso, Indiana:
Chloride contamination (Cont'd)

Numerical groundwater models were developed and applied to evaluate the effectiveness of alternative remedial pumping scenarios. Three types of groundwater models were used. All three models were fully 3-dimensional and linked by a shared model database. The three model types are:

• Groundwater flow model (single phase), DYNFLOW - incorporates the physical characteristics of the aquifer and computes the distribution of groundwater flow and head in response to pumping, recharge and other boundary conditions.
• 2-Phase flow model, DYNSWIM - an extension of the single phase flow model which incorporates two interacting fluids of different density, i.e., saltwater and (relatively) fresh water.
• Solute transport model, DYNTRACK - computes the advection and dispersion of dissolved solutes in groundwater using flow fields computed by the flow models; does not include any fluid density effects.

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