Groundwater recharge is the entry of water into the saturated zone at the water-table surface. In MAGNET, recharge is treated as a model input of specified flux [L/T] that is constant in time. (Time-varying recharge can be assigned using zone features). Here, in this example problem, a single value (15 in./yr.) is applied throughout the model domain (default setting), but you could also use the spatially-variable recharge raster available from the MAGNET data server or your own raster file of recharge.