[Laura Stabell]

You might want to look at environmental engineering. It can combine sustainability,aesthetics and scientific solutions to problem solving.

[Laura Stabell]

That’s amazing-I guess the concerns of the past have faded in the post cholera era?! In my area septic systems are the largest nitrogen contributor to the rivers-except the occasional horse farm which spot contaminates the surface waters. The sewage treatment plants take some things out but not enough. Diversion permits between water tables and TMDL’s in some streams cut the size of treatment plants and reduce development (thankfully in some cases) Some of the regional cities have failing sewage treatment facilities. Nobody has suggested constructed wetlands that I have heard of.-(except for me) One city was given a waiver from updating its facilities if it cut down on lawn fertilizer use among its residents.

That speaks loud to me how polluting fertilizers are. I’ve always advocated water insoluble nitrogen and mineral fertilizers for that reason. When your pool is in place, its important the lawn guy doesn’t fertilize around the pool and also that the pool isn’t catching runoff from the septic or fertilized areas. Leaves, grass clippings and the like have to be cleaned and cleared out.

I just saw an ad for a company doing pond vacuuming, diver harvesting and fabric lining to reduce weed growth. Northeast Diving Services –http://www.northeastdivingservices.net (I have to admit though-that I think their “before” photo of the pond with the lily pads is preferable to me! Lily pads keep the water cooler which is another way to keep weed growth down.) A septic system garbage pump might be used to suck the muck periodically. Maybe installed in the low point? Water can be screened and filtered and sent back through the system .

There also comes to mind clarifying agents used in wine making. Betonite is one that is used but is listed in some toxicology books as a toxin as well as a potential source of natural PCB’s depending on the mine source of (any) clay. I thought I read of cream of tarter being another-Wikipedia lists more. The use of such material is that it might speed the clarifying of the water, making particles settle so they can be cleaned out. Except for diatomaceous earth (can cause lung problems)and activated charcoal, I haven’t seen any being used commercially in water treatment of pools or ponds. If you have a local sewage treatment plant-they probably can clue you in to any water treatment chemicals used commercially. I think I have read about flocculants being part of the process. My point is, a natural safe clarifying agent might be a useful thing to find to quickly treat water turned murky or to be used as part of the maintenance process.

Have to go! Next time I have to clue you in on snails!

[Laura Stabell]

Hi Miles,

I was just reading Permaculture Magazine(UK). Somebody was writing about using bamboo charcoal for drinking water filtration. I dont know if its better than plain wood charcoal.

Also there people have something called “reed beds” to handle their effluent. I wouldn’t think that would fly here with health dept regulations unless it was covered. I have seen some long glass covered “pits” designed in the US. Im not sure what reed is used- probably cat tails,Typha latifolia , maybe Phragmites? Not a non native invasive in UK like here.

[Laura Stabell]

I have dealt with water gardens, bog gardens,wetlands and other water quality issues. Water is never easy! I designed-never built my own natural pool. This will be a trial and error project. An inexpensive construct might be done using a liner. I’ve used fish quality vinyl-good till a deer waded in. Industrial vinyl pond and canal lining is available now-drinking water quality. Construction suppliers have it for lining chemical lagoons and dumps-so it should hols up. Fish quality butyl rubber is good but expensive-might be more resilient. Just bought poly pond liner/roof garden material from farm tec that I like best. I used 6 mill poly to do bog gardens-a few layers thick in the past. This is 36 mill thick and durable. All lined ponds need to have the hole lined to avoid puncturing from below. If your customer is “green” recycled synthetic carpeting is easy to get from installers for free. The surface also has to be covered to protect from UV rays. This works great for a natural pool where a sand or pebble beach and natural appearance are the goal. The liner needs protecting from above so material can be put on it. Felt carpet padding works great for this. It seems indestructible (Can also be found free) and works as a filter.You should be able to place big stones on top of it by cutting out circles and adding more layers of padding under the stones-bigger stone-more layers. I love to use bank run coarse grade gravel to line the ponds. It is available in my area (tristate) at a very inexpensive price and has all sizes from sand to small round boulders mixed together. The art comes from how you sort the stones. This is a glacial till-so stones are smooth and the sand is sharp(the best filtering sand). It looks gross when it arrives-just wash it. You could also build up the felt sand-gravel in a few layers to filter more. A pump inlet can be buried below  layers to suck the water through the layers. The pump is best above at the top of your installation to replace easily.(make sure suction is diffused so it doesn’t suck someone down and hold them under) The upper ponds can be bogs(pool filled almost with gravel) or ponds.I have used wood to remove nitrogen from natural wetlands by building “beaver dams”.Sewage effluent sent through a series of streams filled with plants ended up with drinking water quality water-so more plants and distance=cleaner water. If your water turns green, oat straw bales work well but are somewhat costly.I was thinking of trying bio-char to filter water. Free for the making from brush on site(might make the water smell smokey for a time) A large pit filled with it capped over with gravel should filter the water of nutrients and toxins.Some larger single celled organisms also turn the water green-many proliferate then die out for good given some time. Kids peeing can turn water green overnight.Ducks might bring duckweed in-tiny plant,tough customer-maybe out compete it with water hyacinth? PH affects water-alkaline PH seems to create more rock slime acidic PH seems to kill off slime(and other life if too high) To recap: Soil base/carpet/pond liner/carpet felt padding/stones-gravel-sand/ plants. Just do it-have fun-give extra time to work out bugs free of charge. Education costs money.

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