Modelling Plume Development with Annual Pulses of Contaminants Released from an Airport Runway to a Layered Aquifer, Evaluation of an In Situ Monitoring System

In cold climates, the use of de-icing chemicals in winter can lead to groundwater contamination, especially when used large quantities, such as at airports. Oslo Airport, Gardermoen, is situated on Norway’s largest rain-fed aquifer. Potassium formate remove ice from runways and propylene glycol airplanes; organic parts are degradable. Most wells monitor spread underlying aquifer have well screens near level, while source divides, where vertical flow expected. The objective this study demonstrate importance layers time-varying recharge spreading contaminant plumes an a divide. This done with numerical modelling. model results show increased transport added tracer presence horizontal layers, both continuous discontinuous, With certain distributions hydraulic conductivity, Ks, we that deeper monitoring required. scenarios modelled here, has weaker effect plume distribution. Measured concentrations potassium total carbon cyclic seasonally varying contaminants, asymptotic accumulation concentration over time, consistent runs. conclusion, systems divide should include multi-level samplers ensure control movement.