Units 

Here you choose the units for data entry. The units can be set for the following components: Rivers, Reservoirs, Groundwater, Other Supplies, Land Use, Wastewater Treatment, and Monetary. The exception is the Default Water Use Rate set on the Demand tab. The Default Water Use Rate you set will be the default data entry unit, but you will be able to change the units individually for each branch. Also, the system Discount Rate is entered on the Monetary tab.

Units Definition

Regardless of the unit used for data entry, you can view results in any units. User-defined units can be added by clicking on the Units Definition button.

Menu Option: General: Units