WMS:Universal Rational Hydrograph: Difference between revisions

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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.
#redirect [[WMS:Rational_Method_Computing_Hydrographs#Universal_Rational_Hydrograph]]
 
{| Border=1 CellSpacing=0 CellPadding=2
|-
| ColSpan=2 |
{| Border=1 CellSpacing=0 CellPadding=2 style="background:#aaccff;"
|-
!Dimensionless Time and Hydrograph Ordinates
|}
|- style="background:#dfdfdf;"
!''t''/''t<sub>c</sub>'' !!''Q''/''Q<sub>p</sub>''
|- Align=Center
|0 ||0.00
|- Align=Center
|1 ||0.21
|- Align=Center
|2 ||0.30
|- Align=Center
|3 ||1.00
|- Align=Center
|4 ||0.54
|- Align=Center
|5 ||0.39
|- Align=Center
|6 ||0.25
|- Align=Center
|7 ||0.18
|- Align=Center
|8 ||0.15
|- Align=Center
|9 ||0.14
|- Align=Center
|10 ||0.13
|- Align=Center
|11 ||0.00
|}
Notice that the peak occurs at ''3*t<sub>c</sub>'', and the time base is equal to ''11*t<sub>c</sub>''.
 
:[[Image:UniversalRationalHydrograph.png]]
 
:where:
 
:* ''t<sub>c</sub>'' = Time of concentration.
:* ''Q'' = Flow at time ''t'', in cfs.
:* ''Q<sub>p</sub>'' = Peak flow.
 
 
==Related Topics==
* [[WMS:Rational Method Computing Hydrographs|Computing Hydrographs with Rational Method]]
* [[WMS:Rational Method Equation|Rational Method Equation]]
 
 
{{WMSMain}}
[[Category:Rational Method|U]]
[[Category:Equations|U]]
[[Category:WMS Plot]]
 
{{stub}}

Latest revision as of 15:43, 11 December 2017