Carried by the surface water, pollutants such as agricultural pesticides and fertilizers, oils and salts from roadways, and industrial effluents can make their way into the groundwater. Surface water migrates into the groundwater by infiltration through the soil, or by runoff into areas where the water table is above the surface of the ground. Above-ground storage tanks and pipelines for petroleum products and other chemicals can leak or break, releasing their contents to seep into an aquifer. Mine tailings and industrial waste stored in surface pits can leach into groundwater.

Video: Migration of the continuous tracer plume for an injection well. Model parameters: Q = 500 GPM;   Hydraulic conductivity of the aquifer: 100 ft/day; Aquifer thickness: 100 ft; Effective porosity: 0.2; River stage difference: 25 ft

Develop a MAGNET model that reproduces the above animation, representing a contamination plume originating from surface contamination zone represented in three different ways 

• "prescribed flux" with a specified concentration, representing a leaky waste water pond above the water table
• "two way head dependent flux" with specified concentration, representing a polluted pond that is hydraulic connected with the aquifer
• "prescribed head", with a specified concentration, representing a polluted pond fully connected with the aquifer

• Use ‘Synthetic mode’ in MAGNET to create a model domain.
• You may follow the model set-up described in the animation caption above.  
• Use line and features as prescribed head boundaries to generate the head difference from the south edge to the north edge of the model.