|
|
| (5 intermediate revisions by the same user not shown) |
| Line 1: |
Line 1: |
| "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|500 px|''HMS Meteorological Model'' dialog]]
| |
| | |
| 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]]
| |
| | |
| | |
| {{Template:WMSMain}}
| |
