WMS:Riverside County Lag Time Equation: Difference between revisions
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:''(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'' | ||
Revision as of 21:01, 26 February 2013
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:
= lag time in hours.
= maximum flow length in miles.
= length to the centroid in miles.
= 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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