I recently dug a small pond on my property. I created a 5' x 5' grid over the pond and out on to the flat ground around it to get an idea of the volume it will hold and surveyed 780 points across it.
My software does the volume and I am good there but I am looking at getting a plastic liner installed so it will hold water and that is sold by the square foot. I know the area of the pond at ground level but I need the actual surface area of the pond bottom.
Attached is a CSV of the survey data - X,Y, Z, Name
The water level will be at 3,268.5' - What I need to know and can't figure out is the surface area of the pond below 3268.5'
Thanks in advance.
Here's a quick look at it in metric Civil3D. In the first screenshot below the red line is the 3268.5 contour. It is not complete, so using 0.1 contour intervals, the next complete one down is 3268.0, which is the blue line. In the second screenshot this blue line is used as a new boundary to the surface and the new 2d and 3d surface areas (in sq "units") are shown. I presume it is the 3d area that is required.
However, it will take considerably more area than what gets calculated. It's like trying to tape sheets of tablet paper onto a globe.
I have no experience in pond liners. But it would seem to me the liner would arrive in a roll of material that would have to be cut into overlapping sheets. In that case, you'll need to account for the required overlap, wrinkles, and misalignments that will likely occur during installation. Good luck.
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Drilldo, post: 429701, member: 8604 wrote: I recently dug a small pond on my property. I created a 5' x 5' grid over the pond and out on to the flat ground around it to get an idea of the volume it will hold and surveyed 780 points across it.
My software does the volume and I am good there but I am looking at getting a plastic liner installed so it will hold water and that is sold by the square foot. I know the area of the pond at ground level but I need the actual surface area of the pond bottom.Attached is a CSV of the survey data - X,Y, Z, Name
The water level will be at 3,268.5' - What I need to know and can't figure out is the surface area of the pond below 3268.5'
Thanks in advance.
This pond will NOT hold water at 3268.5. From NW corner to about due east, the elevation does not get up to 3268.5.
The highest elevation to contain the water is 3268.15
Volume is 94,165 cu. ft.
Planar Surface Area is 17,951 sq. ft.
True Surface Area is 18,606 sq. ft.
Just curious. Where is this located? What Country or state?
Pond topo map.
I've been around a number of lined ponds.
They would bring in manufactured linings on trucks.
As I understand it the company that does the linings would calculate the shape and areas for the linings from the topo.
If you haven't been involved with lined ponds, here are a few things I know. They are highly dangerous and need a number of safety features beginning with a very secure fence.
Then there needs to be ladders and/or roping to allow someone who is unlucky enough to find themselves trapped in one to have a way to escape from it.
The fencing should be secure enough to keep out dogs, cats, rabbits, any animals basically that can't fly.
That's the minimum for safety features there are probably some resources online that discuss lined ponds.
I wouldn't want one on my property, and I wouldn't want one anywhere near my property if I still had children living with me.
Lined ponds vs. unlined ponds - whats the safety difference? I assume it's because your feet slip as you try and climb out?
imaudigger, post: 429748, member: 7286 wrote: Lined ponds vs. unlined ponds - whats the safety difference? I assume it's because your feet slip as you try and climb out?
A slippery slope indeed:
http://baltimore.cbslocal.com/2012/05/24/man-2-sons-found-dead-in-md-manure-pit/
imaudigger, post: 429748, member: 7286 wrote: Lined ponds vs. unlined ponds - whats the safety difference? I assume it's because your feet slip as you try and climb out?
Lined ponds are very slippery, the ones I've been involved with were out in remote areas, there are ropes and ladders to help anyone in them out, a residential one should have a very shallow slope area to allow an escape and should also have ropes or ladders somewhere. Cattle or deer usually will tear the lining apart to climb out or they will drown, along with dogs, cats, rabbits, ect.
There are reasons of course to line a pond, it can be done with plastic, bentonite, hardscape.
There was a development of patio homes near my house, they installed a lined pond, the landscaper working on the project got trapped in it, his yelling attracted some locals and they were able to throw him something to help him get out......they filled in the pond the next week.
You can rip-rap the lining, but that often will fall apart over time.
MightyMoe, post: 429756, member: 700 wrote: Lined ponds are very slippery, the ones I've been involved with were out in remote areas, there are ropes and ladders to help anyone in them out, a residential one should have a very shallow slope area to allow an escape and should also have ropes or ladders somewhere. Cattle or deer usually will tear the lining apart to climb out or they will drown, along with dogs, cats, rabbits, ect.
There are reasons of course to line a pond, it can be done with plastic, bentonite, hardscape.
There was a development of patio homes near my house, they installed a lined pond, the landscaper working on the project got trapped in it, his yelling attracted some locals and they were able to throw him something to help him get out......they filled in the pond the next week.
You can rip-rap the lining, but that often will fall apart over time.
All of the discharge ponds for the gas wells around here are lined. Required by law. They have a built in ramp but not sure what is there for traction. Definitely want multiple of ways to get out.
paden cash, post: 429753, member: 20 wrote: A slippery slope indeed:
http://baltimore.cbslocal.com/2012/05/24/man-2-sons-found-dead-in-md-manure-pit/
Those types of accidents are tragic stories...one family member succumbs to methane...then a second dies trying to save the first.
I don't know why farmers are allowed to have these types of gas traps as part of a commercial business. They should be fenced and have forced ventilation.
Interesting to say the least. I guess we don't have many lined ponds around here. Everybody is too poor to afford one and there isn't the industrial type businesses operating that would use lined ponds. Sounds like economical design isn't the safest design.
imaudigger, post: 429789, member: 7286 wrote: Interesting to say the least. I guess we don't have many lined ponds around here. Everybody is too poor to afford one and there isn't the industrial type businesses operating that would use lined ponds. Sounds like economical design isn't the safest design.
I could be wrong but I always got the idea the manure ponds for hog and cattle operations were lined to protect the influent from contaminating the water table. There are some hog production facilities in the Oklahoma panhandle that are measured in square miles. That's a whole lot of hog piss and crap. If you get downwind of some of those places it can knock you out.
paden cash, post: 429797, member: 20 wrote: If you get downwind of some of those places it can knock you out.
My sister lives 9 miles from one and frequently gets the distinct odor.
Funny thing is, I just received drawings of several large manure storage ponds. I have to build models of these for use with 3d machine guidance systems.
Yes, fence on the plan.
Thanks a million guys!
Sorry for the delayed responses I was out trenching in a 3" PVC pipe from our well to the pond to fill it.
The liner guys stopped by today and by their measurements they came up with 23,000 sq feet. They dig a trench about 4' deep around the perimeter and stuff the liner down in and backfill so it stays anchored.
The reason for the liner is our soil will not hold water. When I had the pond half dug we had a heavy rain that filled it completely up and in less than week it was dry - well not dry it was a mud pit but no standing water.
We looked at bentonite as an option but the contractors said it is really hit an miss if it will work and there is no source close by.
The liner is getting installed for $7,500 which seemed pretty reasonable to me.
I decided on 3,268.0' as the full water level. I walked around the pond and took shots and sprayed paint for the liner install people to see where the 3,268' water level is. I plotted this on Leegreen's map and it falls where it should.
