RE: Converting a swimming pool into a cistern
- Subject: RE: Converting a swimming pool into a cistern
- From: &* N* <m*@internode.on.net>
- Date: Fri, 17 Jul 2009 08:16:30 +0930
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What do I grow in my garden? That’s
quite a question. I go about it in a deliberate thoughtful way. First I grow only things that grow, flower
and seed during the rainy season – Autumn, Winter, Spring. I stretch that
a bit by including plants that finish active growth before Summer starts –
this way I can allow (and am successful with) species, early-flowering and tree
peonies, and clematis – esp. viticella and texensis hybrids. Then I apply rule no.2 : grow plants which
have water-storing mechanisms with-in the above rule. All kinds of bulbs –
but not summer growing ones; these we grow a few of in pots – liliums,
hymenocallis, ismene, hippeastrum, hostas. We grow narcissus, crocus,
tulips, hyacinths, babianas, sparaxis – nearly all species or near
species hybrids avoiding the risks of hybrids made and selected for
European conditions – big, fat ‘Dutch’ tulips and crocus in
particular. Apart from bulbs I look for plants with
other water-storage mechanisms in their roots eg Yuccas, and other tubers,
rhizomes (plenty of irises inc Tall-Bearded) and corms. Rule no.3 is choose plants that originate from
climate zones similar to your own – approx the Med regions of the world,
plus a few experiments from other more extreme summer dry places like western
China and the dry monsoon regions of the Himalaya foothills. Rule no.4 –plants with leaves and
stems that store water – succulents of all kinds, esp aloes. Rule no.5 – plants with other water
conserving mechanisms – silvery/ hairy/ glossy/ waxy leaves. Rule no. 6 – experiment and have fun. Rule no.7 – if it works plant more
of it; if it don’t work don’t do it again – well not more
than 3 tries anyway What to look at of you can’t always have
green – form, shape, texture, light reflecting qualities of foliage,
branch structure, shadows, silhouettes, interesting rocks, varied ‘paving’
– cobbles, crazy, cracked whatever in some inter-connected variety. AND ALWAYS REMEMBER THE POOR STARVING
ARTISTS IN YOU R COMMUNITY WHO MAKE POTS, scrap and found sculptures – or
a Rodin or Bullwinkle if you can afford it. Cheers Trevor N From:
owner-medit-plants@ucdavis.edu [mailto:owner-medit-plants@ucdavis.edu] On Behalf Of Ben Wiswall Hi Trevor, Thanks for fleshing that out: I don't mind if you use metric, I have
one of those handy composition notebooks that has all the conversion values on
the back cover. Congratulations on creating a garden fed only with rainwater! Regarding the monochrome green garden of the Romantics and fertilizer
salesman, I actually agree with you, I doubt I would plant such a garden.
I do require shade though: unless you're within a mile or so of the
Pacific, southern However, I have a hard time with the alternatives proposed by most
waterwise advocates, nearly all of which have extensive areas of shredded bark
mulch. In a wide, casual, country setting, accompanied by large evergreen
oaks, a mulched ground with scattered shrubs and perennials can work. In a suburban tract with a homeowners association, it just doesn't.
Even when it is permitted, a garden featuring native shrubs in a lot of
visible mulch looks dusty and unstructured and rather impoverished when the
neighbors all have mown lawns and dead-headed roses. So, if I forego lawns and roses, I still want a garden that will stand
up to the neighbors' well-groomed and flowery yards. For me this means more
drought-tolerant plants, and more unusual plants, but planted densely enough to
harmonize with the rest of the neighborhood. Trevor, what do you grow in your garden? If you pass on the green
roof and the green floor, what do you have instead? Do you have a gravel
lawn beneath Plane trees with a green shrubbery border, as is sometimes seen in
southern Thanks, Ben A-W From: Hi Ben & others who are interested in pool
conversions The pool is 45ft long x 20ft wide x 8ft
deep grading to 3 feet. I think/ guess it is about 50,000 gallons – we
think in Centimetres and litres so it’s a bit hard for me. It to 3 days
and nights to fill when we first filled it with the tap running full bore. Our garden is almost a half an acre,
slight slope to the SW – most exposed to afternoon heat in summer, very
shallow slightly acidic sandy loam over fractured shale and quartzite. No, the gutters go into our two big new
rainwater tanks. The s/pool almost fills entirely on what rain gets through the
slatted deck that now sits over the old pool hole. I will try to send a photo
of what it looks like. We use a submerged pump permanently in
place with a long 1” diameter hose attached. We don’t use an
irrigation system but move the hose to flood, pond and soak areas as needed
– as I said old trees and our veg patch plus a bit for my greenhouse of
Madagascan and South African plants. I have designed our garden so it gets by
with grey water and the above stored water. We do not use potable tap water on
the garden except for my wife’s few potted plants on our front porch. We have switched our psychological and
cultural focus from gardening in Spring, Summer and Autumn with a winter rest
(the old Anglo-European tradition) to gardening in Autumn, Winter and Spring
with a summer rest. That makes sense to us, saves summer work and watering, and
is in tune with what happens naturally Down Here. That way we work with our
seasons and do not try to fight them. Philosophically I don’t believe that
gardens should be green from top to bottom, front to back, side to side.
It’s a concept based on an Arcadian fantasy developed by the Romantic
poets and novelists. We shouldn’t expect it; it’s not a real
possibility: everything has its season of growth and rest, of green-ness and
dormancy or brown-ness. In American terms it’s a bit too Hollywood.
Florence Yoch has a lot to answer for. As do American lawn companies,
fertilizer companies and chemical companies – those in the All the plants you list would grow well
here under our circumstances IF I chose to grow them. I don’t. Hope this helps. trevor From:
owner-medit-plants@ucdavis.edu [mailto:owner-medit-plants@ucdavis.edu] On Behalf Of Ben Wiswall Hi Trevor, Thanks for the info! It sounds like your climate, with five months of utterly rainless
summer, is comparable to southern What is the pool's capacity? And how large is your garden? I assume roof gutters now feed the pool/cistern? Do you use a pump to water the garden with a hose, or is it connected
to some kind of irrigation system? By late summer the pool is empty: how much of your garden water
could realistically be supplied by the pool/cistern alone? If you did rely solely on harvested rainwater, would you have enough
water to have a garden with a green roof and a green floor? (For example,
Callistemon citrinus and Myoporum parvifolium, or Olea europea and Sedum
anglicum, or Rhus lancea and Drosanthemum rosea, etc.?) Those are just my
minimum requirements for a mediterranean zone garden: in the true desert, I
might tolerate a groundcover of gravel or DG, but not here. If you know, let me know. Thanks, Ben Armentrout-Wiswall From: We did it two years ago. A standard
in-ground concrete pool was converted to a cistern of sorts – the
affordable sort. We fitted a wooden deck over the top with gaps between the
slats so rain can get in; a trapdoor for inspections, access to submersible pump
and access to sweep out dirt and leaves etc during late summer when it has run
dry. The supporting structure is a framework of water-proof timber. Cost me
around $6000 Australian and could be done by any competent wood-structures
builder with a helper or two. We use the water ONLY for our garden. To comply
with building regulations/ health regs etc to save drinking water we would have
to have a sealed pool with guttering from an adjacent garage, it would have to
be mosquito proof – absolutely, and the internal support structures would
have to be of non-rusting steel fabricated to fit + pump and access point. Our
quote from the same builder we used was around $20,000 – hardly economic
for us. As it is the pool/ tank/ cistern
doesn’t quite fill over a regular winter – last yr very below
average, this yr going above but it is a very handy contributor to keeping
established trees and veg garden going through our usual 5 month hot and
utterly rainless summer. And we can still add 3 more narrow profile tanks to
collect 15,000 litres from our garage. This is my next project – maybe
2011 if I can get my books re-published. It is hard work when you are on a
super-pension so DO IT WHILE YOU ARE STILL IN WORK if you can. Regards Trevor N. From:
owner-medit-plants@ucdavis.edu [mailto:owner-medit-plants@ucdavis.edu] On Behalf Of Ben Wiswall Hi All, Has anyone any experience with converting a swimming pool into a
cistern? There was an article about it on a Metropolitan Water District
website, and though we don't have a pool, this would make sense for someone who
had a pool but didn't really use it. -Ben Armentrout-Wiswall |
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