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drainage question PaulS 11-10-2006
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Posted by PaulS on November 10, 2006, 4:00 pm
some books I have read say slope the drain toward daylight. what is the
purpose of 'toward daylight' ?
Thanks,
Paul



Posted by Bob Morrison on November 10, 2006, 2:58 pm
In a previous post PaulS wrote...
> some books I have read say slope the drain toward daylight. what is the
> purpose of 'toward daylight' ?
>

So that the water spills out onto the ground away from whatever it is you
are trying to drain.

--
Bob Morrison, PE, SE
R L Morrison Engineering Co
Structural & Civil Engineering
Poulsbo WA
bob at rlmorrisonengr dot com

Posted by longshot on November 10, 2006, 3:59 pm
right you wouldn't want it to slope towards the house or the barn


> In a previous post PaulS wrote...
>> some books I have read say slope the drain toward daylight. what is the
>> purpose of 'toward daylight' ?
>>
>
> So that the water spills out onto the ground away from whatever it is you
> are trying to drain.
>
> --
> Bob Morrison, PE, SE
> R L Morrison Engineering Co
> Structural & Civil Engineering
> Poulsbo WA
> bob at rlmorrisonengr dot com



Posted by DanG on November 10, 2006, 5:17 pm
The very best solution to all drainage issues is move the water
away on the surface with enough slope to move and keep it away
from your "stuff".

In an ideal piped system you would always like to drain runoff
water to daylight. This is often difficult or impossible due to
the geography of your property, there may simply be nowhere to
allow gravity to take the water and discharge it above ground or
the distance to do so is prohibitive. The next best solution
would to send runoff to a major storm system. Another alternative
would be to take it to a good functioning drywell. The worst
scenario might take water to a mechanical lift or sump of some
type.

When a properly sized pipe ends in daylight, the only thing that
can go wrong is having the daylight end under flood waters or a
blockage caused by pipe failure or critters. The city storm can
be overpowered, drywells can become saturated or overpowered, and
mechanical lifts fail when needed most (one of Murphy's laws)
either due to power failure. equipment failure, or inadequate
sizing..
___________________________
Keep the whole world singing. . . .
DanG


> some books I have read say slope the drain toward daylight.
> what is the purpose of 'toward daylight' ?
> Thanks,
> Paul
>



Posted by Mark on November 10, 2006, 7:27 pm
> The worst scenario might take water to a mechanical lift or sump of some
> type.

That's 'second-worst.'

The worst scenario was the lake in my basement every winter
before I dug a catchbasin and installed a sump pump. Now
my basement has been completely dry for three winters,
including our recent visit from the "pineapple express."

http://www.canleyworks.com/projects/drainage/

-Mark



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