Lake Water Intake Systems
Lake Water Intake Systems
(OP)
Hello,
I am wondering if anyone has any experience designing lake water intake systems. I have a shallow lake that freezes over the winter that I need to draw 2000m^3/day from. We were thinking a stilling well on the bank of the lake with a pipe running into the lake from below the surface.
Does anyone have any experience designing any systems like this?
Thanks!
I am wondering if anyone has any experience designing lake water intake systems. I have a shallow lake that freezes over the winter that I need to draw 2000m^3/day from. We were thinking a stilling well on the bank of the lake with a pipe running into the lake from below the surface.
Does anyone have any experience designing any systems like this?
Thanks!





RE: Lake Water Intake Systems
RE: Lake Water Intake Systems
I don't suppose I have a specific question. As the job proceeds questions will arise I'm sure.
RE: Lake Water Intake Systems
RE: Lake Water Intake Systems
One problem is growth inside the pipe. With fresh nutrients flowing past all the time there is a build up. In desalination plants there is a hypochlorite injection point offshore to kill the growth.
You would also need an intake structure and grid to avoid sucking up fish. A figure of 0.2m/s for flow rates is quoted so that fish can swim away but this may depend on fish size.
A job we are looking at presently in the sea has a electronic fish repelling system.
Hope this helps.
Stephen Argles
Land & Marine
www.landandmarine.com
RE: Lake Water Intake Systems
The grid is needed to exclude humans and other trash.
Mike Halloran
Pembroke Pines, FL, USA
RE: Lake Water Intake Systems
Just my opinions.
Regards,
SNORGY.
RE: Lake Water Intake Systems
The biggest issue I have had is with solids loading. If you are piping into a pipeline, for example, you can silt up pretty quickly without filtration. In one application, to deliver water filtered down to 100 microns, we calculated an annual operating cost - in filter element replacement / maintenance alone - of $84,000.00. Make sure you get a good water analysis and plan accordingly.
Regards,
SNORGY.
RE: Lake Water Intake Systems
We are looking into ways to avoid excessive solids from entering the system. The lake that we are tapping into is fairly small and secluded and we are getting a survey of the lakebed and associated geotechnical information. I will see if we can do some water sampling as well.
Artisi: we would use a water agitation system around the float so that the water does not freeze in the pumps vacinity. A believe tapping into the lake horizontally would be an easier solution. We may use a float and anchor system for the end of the inlet pipe however to limit sediment intake. In this senario we would allow the float to freeze.
Thanks again for all your comments and please feel free to give me any more input!
RE: Lake Water Intake Systems
If you are in an area with severe winter, some of the flow can be tapped to provide aeration around the well to prevent it being destroyed or torn out of its position by the ice.
RE: Lake Water Intake Systems
Good one Mike! Having a good day? Everyone treating you kindly?
jt