WMS:OC Rational Job Control: Difference between revisions

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The Job Control parameters include all of the universal data necessary to run an Orange County analysis that are not a part of a basin, reach, or reservoir. The following are the specific parameters defined as part of job control:
The Job Control parameters include all of the universal data necessary to run an Orange County analysis that are not a part of a basin, reach, or reservoir. The following are the specific parameters defined as part of job control:


'''Units:''' By default Orange County performs computations in English units, however metric unit calculations can be specified.
*'''Units''' – By default Orange County performs computations in English units, however metric unit calculations can be specified.


'''Frequency:''' Select the return period of the design storm. Non-mountainous and mountainous IDF curve values are updated based on this selection. The user must enter IDF curve values for the 500-yr storm.
*'''Frequency''' – Select the return period of the design storm. Non-mountainous and mountainous IDF curve values are updated based on this selection. The user must enter IDF curve values for the 500-yr storm.


'''Expected Value:''' Toggle this check box on to do an expected value analysis. IDF curves and losses will be automatically updated for each sub-area if they have already been computed.
*'''Expected Value''' – Toggle this check box on to do an expected value analysis. IDF curves and losses will be automatically updated for each sub-area if they have already been computed.


===IDF Curves===
===IDF Curves===
IDF (intensity-duration-frquency) curves in Orange County are calculated differently depending on the location of the analysis. This section is subdivided into non-mountainous (areas below 2000 feet) and mountainous (areas above 2000 feet) regions.  
IDF (intensity-duration-frquency) curves in Orange County are calculated differently depending on the location of the analysis. This section is subdivided into non-mountainous (areas below 2000 feet) and mountainous (areas above 2000 feet) regions.  


'''Non-mountainous''' &ndash; The IDF curves are generated using a regression equation <math>I = atb</math> where:
*'''Non-mountainous''' &ndash; The IDF curves are generated using a regression equation <math>I = atb</math> where:
** <math>I</math> &ndash; rainfall intensity (in/hr, mm/hr)
** <math>t</math> &ndash; duration (min)
** <math>a, b</math> &ndash; regression equation coefficients


* <math>I</math> &ndash; rainfall intensity (in/hr, mm/hr)
*'''Mountainous''' &ndash; The IDF curves are generated by interpolating between known intensities at specified time values.
* <math>t</math> &ndash; duration (min)
* <math>a, b</math> &ndash; regression equation coefficients
 
'''Mountainous''' &ndash; The IDF curves are generated by interpolating between known intensities at specified time values.




Revision as of 21:33, 13 February 2013

File:Job control.JPG

The Job Control parameters include all of the universal data necessary to run an Orange County analysis that are not a part of a basin, reach, or reservoir. The following are the specific parameters defined as part of job control:

  • Units – By default Orange County performs computations in English units, however metric unit calculations can be specified.
  • Frequency – Select the return period of the design storm. Non-mountainous and mountainous IDF curve values are updated based on this selection. The user must enter IDF curve values for the 500-yr storm.
  • Expected Value – Toggle this check box on to do an expected value analysis. IDF curves and losses will be automatically updated for each sub-area if they have already been computed.

IDF Curves

IDF (intensity-duration-frquency) curves in Orange County are calculated differently depending on the location of the analysis. This section is subdivided into non-mountainous (areas below 2000 feet) and mountainous (areas above 2000 feet) regions.

  • Non-mountainous – The IDF curves are generated using a regression equation where:
    • – rainfall intensity (in/hr, mm/hr)
    • – duration (min)
    • – regression equation coefficients
  • Mountainous – The IDF curves are generated by interpolating between known intensities at specified time values.


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