The Recharge conc in UZT: Unsaturated-Zone Transport Package (MT3D-USGS) pane is on the MODFLOW Features tab of the Object Properties dialog box.
This tab is used for specifying the concentration of recharge in the Unsaturated Zone Flow (UZF) package.
The data that can be specified in this pane are the Starting time, Ending time, and Recharge concentration (CUZINF).
Starting time and Ending time are explained in the help for the MODFLOW Features tab.
Recharge concentration is the concentration of flux into the saturated zone from the unsaturated zone.
