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Home: KOI Talk: Pond Construction & Water Filtering System:
Calclations

 





 


verynewtokoi
Koi Lover

May 15, 2008, 6:28 PM

Post #1 of 5 (941 views)
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Calclations Can't Post
Please help

How does one calculate the volume of a circular pond?

and,

How do I calculate how much flow I would get from a bottom drain? (In this case on a40mm pipe?)

Thanks


yongfan
Koi Lover

May 17, 2008, 12:01 AM

Post #2 of 5 (901 views)
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Re: [verynewtokoi] Calclations [In reply to] Can't Post
Volume(m3) = Diameter(m) x Diameter(m) x 0.785 x Water Depth(m)

The flow thru bottom drain depend on your pumps. the pipe size of 100 mm could handle flow rate up to 50 - 60 m3/hr at reasonable headloss.


Epal63
Koi Lover

Sep 3, 2008, 3:56 PM

Post #3 of 5 (471 views)
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Re: [yongfan] Calclations [In reply to] Can't Post
In Reply To
Volume(m3) = Diameter(m) x Diameter(m) x 0.785 x Water Depth(m)

The flow thru bottom drain depend on your pumps. the pipe size of 100 mm could handle flow rate up to 50 - 60 m3/hr at reasonable headloss.
Interesting formula on the volume. I always thought it should be radius rather than diameter, and PI value should be more than 0.785....Tongue


yongfan
Koi Lover

Sep 5, 2008, 10:38 AM

Post #4 of 5 (419 views)
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Re: [Epal63] Calclations [In reply to] Can't Post
simplified from (0.758 = 3.142/4) x Diameter x Diameter or 3.142 radiaus x radiaus where radiaus = Diameter / 2 ; 3.142 = pi

It is easier to measure diameter than radiaus.


philippinekoi
Koi Lover

Sep 6, 2008, 8:43 AM

Post #5 of 5 (385 views)
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Re: [yongfan] Calclations [In reply to] Can't Post
For a 3 inch bottom drain, the flowrate is 1200 gallons max - gravity.

 
 
 



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