WMS:Riverside County Lag Time Equation: Difference between revisions
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The Riverside County Flood Control and Water Conservancy District developed three different lag equations corresponding to mountainous, foothill, and valley areas near Riverside County, California (Anonymous, 1963). | The Riverside County Flood Control and Water Conservancy District developed three different lag equations corresponding to mountainous, foothill, and valley areas near Riverside County, California (Anonymous, 1963). | ||
: | :<math>T_{LAG} = 1.20 \left ( \frac {L \ast L_{ca}}{ \sqrt {S}} \right )^{0.38} </math> | ||
:''(Mountainous) 15.19'' | :''(Mountainous) 15.19'' | ||
: | :<math>T_{LAG} = 0.72 \left ( \frac {L \ast L_{ca}}{ \sqrt {S}} \right )^{0.38} </math> | ||
:''(Foothills) 15.20'' | :''(Foothills) 15.20'' | ||
: | :<math>T_{LAG} = 0.38 \left ( \frac {L \ast L_{ca}}{ \sqrt {S}} \right )^{0.38} </math> | ||
:''(Valleys) 15.21'' | :''(Valleys) 15.21'' | ||
where: | where: | ||
T<sub>LAG</sub> | :''T<sub>LAG</sub>'' = lag time in hours. | ||
L | :''L'' = maximum flow length in miles. | ||
L<sub>ca</sub> | :''L<sub>ca</sub>'' = length to the centroid in miles. | ||
S | :''S'' = weighted slope along the maximum flow path length in ft/mile. | ||
The typical characteristics of watersheds for which the Riverside County equations were used include the following: | The typical characteristics of watersheds for which the Riverside County equations were used include the following: | ||
* Areas from 2 to 650 square miles. | |||
Areas from 2 to 650 square miles. | |||
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{{WMSMain}} | {{WMSMain}} | ||
[[Category:Equations|Riverside]] | |||
[[Category:WMS Basins|Riverside]] | |||
Latest revision as of 15:13, 29 September 2017
The Riverside County Flood Control and Water Conservancy District developed three different lag equations corresponding to mountainous, foothill, and valley areas near Riverside County, California (Anonymous, 1963).
- (Mountainous) 15.19
- (Foothills) 15.20
- (Valleys) 15.21
where:
- TLAG = lag time in hours.
- L = maximum flow length in miles.
- Lca = length to the centroid in miles.
- S = weighted slope along the maximum flow path length in ft/mile.
The typical characteristics of watersheds for which the Riverside County equations were used include the following:
- Areas from 2 to 650 square miles.
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