WEL: Well Package Pane

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The Well package allows the user to specify a volumetric rate of fluid withdrawal or injection. Positive pumping rates represent injection, negative rates represent withdrawals. The pane for this package is on the MODFLOW Packages and Programs dialog box under Specified Flux.

PHIRAMP is the fraction of the cell thickness used as an interval for smoothly adjusting negative pumping rates to 0 for dry cells. Negative pumping rates are adjusted to 0 or a smaller negative value when the head in the cell is equal to or less than the calculated interval above the cell bottom. If PHIRAMP is not specified, MODFLOW-NWT uses a default value of 0.05.

The user can also specify parameters for the well pumping rate. The final pumping rate will be the parameter value times a multiplier. Objects must be used to define the well pumping rates or well pumping rate multipliers. The user can also set up well pumping rates that do not involve parameters.

Parameters can also be edited in the Manage Parameters dialog box.