WMS:Rational Hydrograph: Difference between revisions
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The Rational Unit Hydrograph has a time to peak equal to the time of concentration. Both the rising and receding limbs of the hydrograph have a duration equal to the time of concentration, and therefore the shape of the hydrograph is an isosceles triangle with a time base of <math>2t_c</math> as shown below. This method is chosen by specifying the Modified Hydrograph Method using 1.0 for the recession limb coefficient and <math>t_c</math> for the storm duration. | The Rational Unit Hydrograph has a time to peak equal to the time of concentration. Both the rising and receding limbs of the hydrograph have a duration equal to the time of concentration, and therefore the shape of the hydrograph is an isosceles triangle with a time base of <math>2t_c</math> as shown below. This method is chosen by specifying the Modified Hydrograph Method using 1.0 for the recession limb coefficient and <math>t_c</math> for the storm duration. | ||
[[Image: | [[Image:RationalHydrograph1.gif]] | ||
Revision as of 17:01, 29 April 2015
The Rational Unit Hydrograph has a time to peak equal to the time of concentration. Both the rising and receding limbs of the hydrograph have a duration equal to the time of concentration, and therefore the shape of the hydrograph is an isosceles triangle with a time base of as shown below. This method is chosen by specifying the Modified Hydrograph Method using 1.0 for the recession limb coefficient and for the storm duration.
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