Template: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 ''2t<sub>c</sub>'' as shown below. This method is chosen by specifying the Modified Hydrograph Method using 1.0 for the recession limb coefficient and ''t<sub>c</sub>'' 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 ''2t<sub>c</sub>'' as shown below. This method is chosen by specifying the Modified Hydrograph Method using 1.0 for the recession limb coefficient and ''t<sub>c</sub>'' for the storm duration. | ||
:[[Image:RationalHydrograph1.png]] | :[[Image:RationalHydrograph1.png]]<noinclude>[[[[Category:Rational Method|H]][[Category:Equations]]</noinclude> | ||
Latest revision as of 15:27, 11 December 2017
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 2tc as shown below. This method is chosen by specifying the Modified Hydrograph Method using 1.0 for the recession limb coefficient and tc for the storm duration.
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