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| As regions are selected in the Regions overlapped by watershed window the relevant parameters for the regional equations are added to the spreadsheet. Parameters that can be computed by WMS are defaulted to their computed values at the time the regression equation is selected for use. You may override defaulted values if you wish, and later return to the computed values by clicking on the '''Restore Computed Geometric Values''' button.
| | #redirect [[WMS:NSS Computing Peak Discharges#Variable Values]] |
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| Parameters not computed by WMS when computing basin data can sometimes be computed using the generic ''GIS Overlay calculator''. This option (under the '''Calculators''' menu) can be used for example to determine the percentage of lake or forest cover from your drainage coverage and a land use layer.
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| The NSS program includes in its database the range of parameter values for the watersheds used in developing the regression equations. The applicable range, along with the expected units are displayed on the same row as the parameter edit field.
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| ==Related Topics==
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| * [[WMS:NSS Computing Peak Discharges|Defining an NSS Simulation]]
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| * [[WMS:NSS|Overview of NSS]]
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| * [[WMS:Coverage Overlays|GIS Overlay]]
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| {{WMSMain}}
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