There are multiple methods to define precipitation data. To define precipitation data, take one of the following steps:
1. Uniform Precipitation Method.
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- Use Precipitation... under the GSSHA menu to enter the data for the rainfall event, intensity, duration, and start date/time.
- Enter the GSSHA job control parameters.
- Save and run the GSSHA model.
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2. Using a Design Storm Hyetograph.
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- Select Precipitation... under the GSSHA menu and define the distribution under the Hyetograph option.
- Save and run the GSSHA model.
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4. Rain gages with the Thiessen Polygon Method.
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- Select Precipitation... under the GSSHA menu and select Thiessen polygons as the interpolation method.
- Save and run the GSSHA model.
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