DRAINMOD simulations for two agricultural drainage sites in western Fillmore County, southeastern Minnesota

DRAINMOD, a field-scale, process-based, distributed model (Skaggs, 1980; https://www.bae.ncsu.edu/agricultural-water-management/DRAINMOD/), was used to simulate subsurface drainage flow and field water-surface elevations. DRAINMOD simulations are often used to optimize drainage patterns for agricultural fields with subsurface drainage. For this study, the model results were also used to simulate deep seepage rates. Deep seepage is the amount of water that moves past the agricultural drains. These deep seepage rates were then used as a surrogate for potential groundwater recharge rates. A total of nine different scenarios were run, each sceanrio corresponding to a different location on one of three different field sites (two drained sites, one undrained site). All of the different scenarios and model results are discussed in the associated Scientific Investigations Report, https://doi.org/10.5033/sir20205006.