WMS:Universal Rational Hydrograph: Difference between revisions
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!t/ | !<math>t</math>/<math>t_c</math> !!<math>Q</math>/<math>Q_p</math> | ||
|- Align=Center | |- Align=Center | ||
|0 ||0.00 | |0 ||0.00 | ||
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Notice that the peak occurs at 3* | Notice that the peak occurs at <math>3*t_c<math>, and the time base is equal to <math>11*t_c</math>. | ||
[[Image:WMSImage81.gif]] | [[Image:WMSImage81.gif]] | ||
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where: | where: | ||
* | * <math>t_c</math> = time of concentration. | ||
* Q = Flow at time t, in cfs. | * <math>Q</math> = Flow at time <math>t</math>, in cfs. | ||
* Qp = Peak flow. | * <math>Qp</math> = Peak flow. | ||
'''Related Topics:''' | '''Related Topics:''' | ||
* [[WMS:Rational Method Computing Hydrographs|Computing Hydrographs with Rational Method]] | * [[WMS:Rational Method Computing Hydrographs|Computing Hydrographs with Rational Method]] | ||
* [[WMS:Rational Method Equation|Rational Method Equation]] | * [[WMS:Rational Method Equation|Rational Method Equation]] | ||
Revision as of 23:16, 7 March 2013
The Universal Rational Hydrograph uses a set of coefficients and the peak discharge to compute the hydrograph ordinates at different times. The coefficients are shown in the following table and the resulting hydrograph is displayed.
| ||
| / | / | |
|---|---|---|
| 0 | 0.00 | |
| 1 | 0.21 | |
| 2 | 0.30 | |
| 3 | 1.00 | |
| 4 | 0.54 | |
| 5 | 0.39 | |
| 6 | 0.25 | |
| 7 | 0.18 | |
| 8 | 0.15 | |
| 9 | 0.14 | |
| 10 | 0.13 | |
| 11 | 0.00 | |
Notice that the peak occurs at .
where:
- = time of concentration.
- = Flow at time , in cfs.
- = Peak flow.
Related Topics:
