General Program Information

This program draws the slopes into the bottom of the floctank to provide access for the water to flow out of the valves when draining. Since drains must always be put in the first and last channels of the flocculator, in the event of an even number of channels, there will be two drains placed contiguously in the channels closest to the entrance tank. This code is the same for horizontal and vertical flocculators.

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[!floc slope.PNG|width=450px!|AutoCAD Channel Program]
Slopes in Floor of Flocculator
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Technical Program Information

1) A new layer, "flocdrainslopes," is created.

2) The slopes are iteratively drawn as wedges in each channel from the channel closest to the sedimentation tank to the channel closest to the entrance tank.

• The width of a slope is equal to the diameter of the valves, the center of which is aligned with the middle of its channel.
• The depth of the slope into the bottom of the floctank is half of a valve diameter, putting the center of the opening at-grade.
• The length of the slope is determined by setting the angle of the slope to 30 degrees. If the slope is so long that it extends beyond the nearest baffle, the length is recalculated to be 5 cm away from the nearest baffle.

3) All wedges are unioned.

4) The "floctank" layer is thawed so that it may be edited.

5) The unioned slopes are subtracted in a single command from the floctank.

6) The "floctank" and "drainslopes" layers are frozen.