# Difference between revisions of "HY8:Contra Costa Basin"

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===Contra Costa Basin=== | ===Contra Costa Basin=== | ||

The input variables required for this calculation is the following: | 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. | * 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. | * 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. | * Basin Width — The channel width is recommended for the basin width. | ||

The following figures show the design of a Contra Costa basin. | The following figures show the design of a Contra Costa basin. | ||

Line 12: | Line 10: | ||

Variables from the figure | Variables from the figure | ||

* D — Diameter of culvert | * D — Diameter of culvert | ||

* y<sub>0</sub> — Outlet depth | * y<sub>0</sub> — Outlet depth |

## Latest revision as of 14:39, 11 October 2016

### 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
- y
_{0}— Outlet depth - y
_{2}— Approximate maximum water surface depth - y
_{3}— Basin exit velocity - V
_{0}— Outlet velocity - V
_{2}— Exit velocity - h
_{1}— Height of small baffle - h
_{2}— Height of large baffle - h
_{3}— Height of end sill - L
_{2}— Length from culvert exit to large baffle - L
_{3}— Length from large baffle to end sill - L
_{B}— Basin length