Our research shows the effect of time-resolution in groundwater stresses (monthly vs. annual vs. steady state representation of pumping and recharge) on nitrate transport modeling results. Simulation of pumping and recharge stresses as well as NPS nitrate loading using average annual, average multi-annual, or even steady-state stress/loading conditions may yield representative results.
Nitrate in drinking water may cause serious health problems for consumers. Agricultural activities are known to be the main source of groundwater nitrate contaminating rural domestic and urban public water supply wells in farming regions.
At the core of the NPSAT tool is software for the simulation of a high-resolution steady-state flow solution in an unconfined aquifer. Methods and example applications are described and documented in this paper (manuscript in preparation).