WMS:Rational Hydrograph: Difference between revisions
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{{Rational Hydrograph}} | |||
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. | ||
Revision as of 15:25, 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.
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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