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An interface to NFF within WMS provides the following benefits:
1. WMS computes basin geometric parameters from a TIN. Many of the regression equations are functions of geometric parameters computed by WMS such
as area, slope, elevation, basin length, etc. Whenever an equation is specified which uses a variable computed by WMS, the value is automatically substituted. The user always has the chance to "override"
the value computed by WMS, and other variables such as mean annual precipitation, basin storage, etc., can be defined prior to performing computations.
2. WMS works in both MS-Windows and UNIX-X-Windows environments. Therefore the interface to NFF within WMS is an intuitive graphical interface that
runs on both types of platforms.
3. The interface can be used with or without terrain data to supply geometric parameters. There are obvious advantages to using digital terrain data
to aid in basin delineation and geometric parameter computations, but in many instances the terrain data is not available. In such cases WMS can still be used in the same way the NFF program currently works (the
user specifies values for all variables in the specified regression equation(s)) except that it is runs in the Windows environment.
4. WMS has interfaces to other hydrologic modeling programs such as TR-20 and HEC-1 which, when necessary, can be used to compare results with NFF.
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