[SEL] O.T. O.T. Need Help On Water Flow Problem

frank skinner marinesurveys at msn.com
Wed Jun 3 09:48:19 PDT 2009


Paul;

Why not just use a soaker hose 

        Franklin S. Skinner 
    Marine Surveyor & Consultant 
3428 Talon Court Wilmington NC 28409 
       34'10.9 North 74'52.4 West 
PH 910-791-8870 Cell 910-612-7470



 
> From: paulmaples at sbcglobal.net
> To: sel at lists.stationary-engine.com
> Date: Wed, 3 Jun 2009 09:28:26 -0600
> CC: MaytagTwin at aol.com; k_armstrong at arach.net.au
> Subject: Re: [SEL] O.T. O.T. Need Help On Water Flow Problem
> 
> Thanks Bob.
> 
> I have been told that 1 gallon of water will cover 230 cubic inches to a 
> dept of 1". I measured my water flow from the end of the hose coming from my 
> water faucet and it is 5 gpm per minute. I know that my actual bed size is 
> 117.5" X 39.5" or 4641.3 cubic inches of soil surface. 1 gallon of water = 
> 230 ci so I divide my total soil surface of 4641.3 by 230 which = 20.1 
> gallons of water needed to achieve a water penetration depth of 1" over my 
> soil surface. Knowing that my flow rate is 5 GPM/minute I now divide the 
> 20.1 gallons needed by 5 gpm/min (actual flow rate) and find I would need to 
> leave the water on for 4 minutes in order to achieve a 1" depth of water 
> penetration over the bed area.
> 
> In order for this to work I will need to get an equal flow out of each of 
> the dispensing holes or some parts of the bed will get more and some get 
> less of the water. This is my problem, trying to achieve an equal amount of 
> water out of each orifice.
> 
> Paul
> 
> 
> ----- Original Message ----- 
> From: "Bob Willman" <blcksmth at wcnet.org>
> To: "'The SEL email discussion list'" <sel at lists.stationary-engine.com>
> Sent: Tuesday, June 02, 2009 10:21 PM
> Subject: Re: [SEL] O.T. O.T. Need Help On Water Flow Problem
> 
> 
> > I would think that very very small holes at the 16 locations so that
> > the water flow from each is a very small percentage of the flow in the 
> > main
> > pipe so as to maintain constant pressure throughout the system. As it is 
> > the
> > pressure drops after each discharge hole. You could start with a larger
> > diameter pipe up front and reduce the diameter after each opening which, I
> > think, is the accepted method.
> > If all the holes are already drilled and the system is level, I
> > would try turning all the discharge holes to the top of the pipe and use a
> > very slow flow rate in order to fill the entire pipe and let it slowly run
> > out over the pipe to keep the flow rate slow but hopefully stabilize the
> > pressure along the whole length.
> >
> >
> > Bob Willman
> 
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