evaporation rate is worrying me

On Sun, 15 Aug 2004 02:40:35 GMT, "tim chandler"
wrote:

Larry,

It sure sounds like a leak. To lose a foot a day in a 3'x3' area (only 9
square feet of surface area) is 9 cubic feet of water or about 67-68 gallons
a day! If you had, say, 150 square feet of pond instead in full sun and
lived in a hot and dry and/or windy climate, then to lose that much a day
would take it down less than an inch and wouldn't be out of the range for
evaporation alone.

You may be able to pin it down by filling everything up to the brim but not
running the waterfall. Let it stand for a day and see what part loses
water. If nothing goes down, then yes, evaporation from your waterfall
could be the problem - but to lose that much in a day I'd still suspect a
leak.

Happy Ponding,
Tim


Thanks Tim,

As I posted the message tonight, I thought about the 12" estimate.
Thought that it sounded like a lot so I stuck my hands in with a tape
to see. I'd estimate closer to 8". When I'm away for a few days I
turn the pump waterfall pump off. I loose very little during those
few days.

Does anyone know if the waterfall is contributing to the vast majority
of evaporation.

TIA

Larry
Southern Ontario

I don't think it is evaporation, it could be splash, or could be wicking
away somewhere along the waterfall's course. How wet is the ground around
the waterfall area? ~ jan

On Sat, 14 Aug 2004 22:57:51 -0400, Larry wrote:

On Sun, 15 Aug 2004 02:40:35 GMT, "tim chandler"
wrote:

Larry,

It sure sounds like a leak. To lose a foot a day in a 3'x3' area (only 9
square feet of surface area) is 9 cubic feet of water or about 67-68 gallons
a day! If you had, say, 150 square feet of pond instead in full sun and
lived in a hot and dry and/or windy climate, then to lose that much a day
would take it down less than an inch and wouldn't be out of the range for
evaporation alone.

You may be able to pin it down by filling everything up to the brim but not
running the waterfall. Let it stand for a day and see what part loses
water. If nothing goes down, then yes, evaporation from your waterfall
could be the problem - but to lose that much in a day I'd still suspect a
leak.

Happy Ponding,
Tim


Thanks Tim,

As I posted the message tonight, I thought about the 12" estimate.
Thought that it sounded like a lot so I stuck my hands in with a tape
to see. I'd estimate closer to 8". When I'm away for a few days I
turn the pump waterfall pump off. I loose very little during those
few days.

Does anyone know if the waterfall is contributing to the vast majority
of evaporation.

TIA

Larry
Southern Ontario



~Power to the Porg, Flow On!~

Maybe I can help. I have a 2500 gallon pond and started losing about 3" a
day. Looked carefully and found a hairline crack along the waterfall. It
was maybe 1/16th of an inch, or less. I thought there was no way a tiny
crack could be the issue, but once I sealed it it was solved. Guess I
should have paid more attention in high school physics.

gary
"~ jan JJsPond.us" wrote in message
...
I don't think it is evaporation, it could be splash, or could be wicking
away somewhere along the waterfall's course. How wet is the ground around
the waterfall area? ~ jan

On Sat, 14 Aug 2004 22:57:51 -0400, Larry wrote:

On Sun, 15 Aug 2004 02:40:35 GMT, "tim chandler"
wrote:

Larry,

It sure sounds like a leak. To lose a foot a day in a 3'x3' area (only
9
square feet of surface area) is 9 cubic feet of water or about 67-68
gallons
a day! If you had, say, 150 square feet of pond instead in full sun and
lived in a hot and dry and/or windy climate, then to lose that much a
day
would take it down less than an inch and wouldn't be out of the range
for
evaporation alone.

You may be able to pin it down by filling everything up to the brim but
not
running the waterfall. Let it stand for a day and see what part loses
water. If nothing goes down, then yes, evaporation from your waterfall
could be the problem - but to lose that much in a day I'd still suspect
a
leak.

Happy Ponding,
Tim


Thanks Tim,

As I posted the message tonight, I thought about the 12" estimate.
Thought that it sounded like a lot so I stuck my hands in with a tape
to see. I'd estimate closer to 8". When I'm away for a few days I
turn the pump waterfall pump off. I loose very little during those
few days.

Does anyone know if the waterfall is contributing to the vast majority
of evaporation.

TIA

Larry
Southern Ontario



~Power to the Porg, Flow On!~

On Sat, 14 Aug 2004 20:31:34 -0700, "gng"
wrote:

Maybe I can help. I have a 2500 gallon pond and started losing about 3" a
day. Looked carefully and found a hairline crack along the waterfall. It
was maybe 1/16th of an inch, or less. I thought there was no way a tiny
crack could be the issue, but once I sealed it it was solved. Guess I
should have paid more attention in high school physics.

Hi Gary,

How did you find that crack? I have rocks on the liner all the way
down. Did you listen or see the crack first. Water seems to sit okay
in the top tier (1") when the pump is turned off and it seems to stay
in the larger bottom receptacle(3x3') when I turn it off. Sounds
like a bit of grunt work coming.

Larry
Southern Ontario

On Sat, 14 Aug 2004 20:22:11 -0700, ~ jan JJsPond.us
wrote:

I don't think it is evaporation, it could be splash, or could be wicking
away somewhere along the waterfall's course. How wet is the ground around
the waterfall area? ~ jan

Hi Jan,

The pond liner extends a good 2' on both sides of the course. The
ground is not wet. I'll ask Gary how he found his crack.

Thanks,

Larry
Southern Ontario

Larry wrote:

As I posted the message tonight, I thought about the 12" estimate.
Thought that it sounded like a lot so I stuck my hands in with a tape
to see. I'd estimate closer to 8". When I'm away for a few days I
turn the pump waterfall pump off. I loose very little during those
few days.

Does anyone know if the waterfall is contributing to the vast majority
of evaporation.

Sounds more like it is contributing to the leak, a fairly sizable leak
somewhere in the waterfall or its plumbing. Most ponds here need some
draining due to the rain we have been getting. No one here is adding
water.

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