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| Once a flow path (time computation) arc has been created for each sub-basin, the LACDPW TC regression equation must be assigned to each arc. This can be done in two ways:
| | #REDIRECT [[WMS:Time Computation]] |
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| #After creating the Tc arc, double-click on it with the Select Feature Arc tool. The Time Computation Arc Attributes dialog will appear.
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| #Select a sub-basin and bring up the Edit MODRAT Parameters dialog. Then click on the [[WMS:Compute Regression Tc|Compute Regression Tc]] button. This will invoke the Travel Time Computation dialog; the flow path arc can be selected and assigned an equation by selecting the Edit Arcs button. This button will invoke the Time Computation Arc Attributes dialog. | |
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| Once in the [[WMS:Time Computation|Time Computation Arc Attributes]] dialog, choose the LACDPW TC equation. The necessary variables will be shown in the window at the bottom of the dialog. If you have computed the watershed data and assigned [[WMS:MODRAT Rainfall|rainfall]], [[WMS:MODRAT Soil Type|soil type]], and [[WMS:MODRAT Impervious Area|percent impervious]], all the variables will be assigned the appropriate values. If not, you can select the variables and enter a value manually.
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| '''NOTE:''' Once you have selected the LACDPW TC equation for one Tc arc in your model, it becomes the default for all other arcs.
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| ==Related Topics==
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| * [[WMS:Automated Tc Calculations|Automated Tc Calculations]]
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| * [[WMS:Compute Regression Tc|Compute Regression Tc]]
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| * [[WMS:Flow Path Arcs|Flow Path Arcs]]
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| * [[WMS:Regression Tc Arc Computations|Regression Tc Arc Computations]]
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| {{WMSMain}}
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