WMS:Modified Rational Hydrograph: Difference between revisions

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The Modified Rational Hydrograph also assumes that the time to peak is equal to the ''t<sub>c</sub>'', but allows for the duration of the storm to be longer than ''t<sub>c</sub>, resulting in a trapezoidal shaped hydrograph as shown below. A coefficient to modify the slope of the receding limb may also be applied with this method.
#redirect [[WMS:Rational_Method_Computing_Hydrographs#Modified_Rational_Hydrograph]]
 
[[Image:ModifiedRationalHydrograph.gif]]
 
where:
 
* <math>t_c</math> = Time of concentration.
* <math>Q</math> = Flow at time <math>t</math>, in cfs.
* <math>Q_p</math> = Peak flow.
* <math>r</math> = Falling limb coefficient
* <math>s_d</math> = Storm duration
 
 
==Related Topics==
* [[WMS:Rational Method Computing Hydrographs|Computing Hydrographs with Rational Method]]
* [[WMS:Rational Method Equation|Rational Method Equation]]
 
 
{{WMSMain}}
[[Category:Rational Method|M]]
[[Category:Equations]]

Latest revision as of 15:38, 11 December 2017