What a SWAT+ with MODFLOW order builds

This is what a SWAT+ with MODFLOW order builds, here in Michigan's Lower Peninsula. First the SWAT+ model, from NHDPlus HR: six subbasins and seven hundred ninety-five channels over seven hundred thirty-one square kilometers. Its average yearly percolation becomes the recharge of a separate groundwater model, in MODFLOW 6, at steady state. That model has three layers on a two-hundred-fifty-meter grid, one hundred thirty-eight by one hundred forty-six cells. Its heads are calibrated to measured water levels at eight hundred fifty-five wells, a step that also scales the recharge, and checked at three hundred sixty-six more wells held out: here they are, simulated against measured. Both models come with the order. SWAT+ with MODFLOW is offered in Michigan's Lower Peninsula, Indiana, Minnesota, Ohio and Wisconsin.