WMS:HEC-HMS Frequency Storm: Difference between revisions

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"The frequency storm method can be used to create a balanced, synthetic storm with a known exceedance probability. Automatic adjustments for storm area and series type are based on the exceedance probability. Depth-duration data are usually obtained from publications such as TP-40 (National Weather Service, 1961)." (HEC-HMS User's Manual) The options for defining a frequency storm are shown below:
#redirect [[WMS:HEC-HMS_Defining_the_Meteorological_Model#Frequency_Storm]]
 
[[Image:HMSFrequencyStorm1.jpg|thumb|none|left|550 px|''HMS Meteorological Model'' dialog for the "Frequency Storm" method.]]
 
Follow the following steps (from the HEC-HMS User's Manual) to set up a frequency storm:
 
# Select a storm exceedance probability from the list (Exceedance probability = (1 / Return Period) * 100%).
# Set the series type for the desired output.
# Select the maximum intensity duration and the total storm duration.
# Enter the precipitation depths corresponding to the selected exceedance probability for the durations between the maximum intensity and storm durations.
# Select the percentage of the storm duration that occurs before the peak intensity.
# Enter the storm area. This is equal to the total drainage area at the point where the exceedance probability will be inferred for the computed flow.
 
 
== Related Topics: ==
* [[WMS:HEC-HMS Defining the Meteorological Model|Defining the Meteorological Model]]
 
 
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[[Category:HEC-HMS|F]]
[[Category:HEC-HMS Dialogs|F]]

Latest revision as of 16:07, 26 February 2018