Enter the same or different hyetographs for each basin, but each basin can only have a single hyetograph. Get this hyetograph from recorded data or from any other method. The User Hyetograph method can be used if a hyetograph is known for each sub-basin of the watershed being modeled. See the topics below for more detailed information about the HMS Meteorological Model dialog. Only use the No Precipitation option if the HMS model does not have any basins. If wanting to model a standard project storm, select the standard project storm or the SCS hypothetical storm method. If wanting to create a synthetic storm with a known exceedance probability, select the frequency storm method.
If having rainfall gage data for the watershed, use the user hyetograph or the user gage weighting method. The precipitation method chosen should be based on the type of analysis to be run.
The same precipitation method must be assigned to all the basins in the HMS model.
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