NITROGEN TRANSFORMATION AND TRANSPORT MODELING IN GROUNDWATER AQUIFERS USING SPREADSHEETS

Groundwater nitrogen pollution is a common problem and it poses a major threat to groundwater-based drinking water supplies. In this study, a kinetic model is developed to study nitrification–denitrification reactions in groundwater aquifers. A new reaction module for the reactive transport in one-dimension code is developed and tested to describe the fate and transport of nitrogen species. The proposed model was developed to simulate groundwater nitrate concentration. The model is later used to study the field-scale nitrogen transport and transformations at a catchment area of Shenyang City. Modeling results are consistent, indicating that the method provides a convenient for solving practical problems on nitrogen transport and transformation. The developed model describing nitrification and denitrification reactions is a useful framework for simulating the fate and transport of nitrogen species in groundwater aquifers.