HY8:Contra Costa Basin
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Contra Costa Basin
The input variables required for this calculation is the following:
- Baffle Block Height Ratio -- The ratio of the baffle block height to baffle block distance from the culvert.
- End Sill Height to Maximum Depth Ratio -- ratio to determine the end sill height from the maximum depth.
- Basin Width -- The channel width is recommended for the basin width.
The following figures show the design of a Contra Costa basin.
Variables from the figure
- D -- Diameter of culvert
- y0 -- Outlet depth
- y2 -- Approximate maximum water surface depth
- y3 -- Basin exit velocity
- V0 -- Outlet velocity
- V2 -- Exit velocity
- h1 -- Height of small baffle
- h2 -- Height of large baffle
- h3 -- Height of end sill
- L2 -- Length from culvert exit to large baffle
- L3 -- Length from large baffle to end sill
- LB -- Basin length
