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Rain Water Storage
Rain Water storage for your Sydney home
The rainwater
cistern is historically an underground basin of water,
but it can also be an above ground barrel or tank.
Much like an
artificial well, cisterns are used to make sure that water is
not contaminated nor suffers from evaporation. Probably the most
effective but overlooked form of rainwater storage in the modern
era rainwater cisterns are practical and can be aesthetically
concealed below ground, behind fencing or trellis. Good materials
for cisterns include plastic liners or membrane material in wood
frames, ceramic, fiberglass, “food grade” plastic
and poly-tanks, as well as other potable liquid materials.
The two
main reasons why people use cisterns are either for the sake of
survival in a place where the only potable water is rainwater,
or ecological awareness in search of sustainability. Either people
need a cistern, or want one because they are concerned about how
they (or others) are consuming water. A rainwater basin needs
to offer enough capacity to collect enough useable water from
a catchment surface. Rain barrels are exceptional tools for not
only excess cistern water, but if connected together can catch
enough rainwater to filter for using for cabins and other weekend
getaways.
The rainwater
cistern can hold large amounts of water and is completely sealed
from contaminants, except those in the water itself. Where evaporation
and external contamination can be issues with basins, the most
practical thing about a cistern in all this is both size and location.
Historically cisterns are put underground because it is one of
the safest places to put something that is to be kept under constant
temperature. Nowadays, we have giant rainwater cisterns that can
be bought from manufacturers and become a wonderful element to
add to your backyard, or barn, there is no reason not to be proud
your rainwater harvesting tank.
Accumulated
water is wealth in some places, and among the people of the sand
in Africa, water is synonym for the word God, so important is
this natural resource. Eskimos have more than 30 different words
for snow, so important is it in their way of life.


In the
average American family of four, anywhere from 900 to 1200 liters
of water are consumed daily. So much water, what if it doesn’t
rain for six months? Well, calculate the amount of cubic liters
needed to safely use a cistern year round according to catchment
size, rainfall, and daily consumption. The longest dry season,
will determine the longest length of time without water, and that
multiplied by days and liters would give the total size of any
given rainwater cistern.What is rainwater storage?
Simply put, it is a way to hold collected rainwater, in a safe,
hygienic, filtered (if possible), and economical fashion so as
to avoid seepage, contamination or evaporation. Hygiene is the
most important part of rainwater storage, as water is a place
for organisms to thrive. Once fully understood the concept of
hygiene, the next concept is filtration, which can be an option
that may mean the difference between drinkable and irrigational
water. Economy is the last point of observation, as any good rainwater
storage container, site, vault, or dank is doing the job of saving
energy.
Etymologically
we know that the word storage only appears after 1612, but descends
from a Greek word “stauros” (stake or pole), for which
in Latin later translated into store. He who builds up or maintains
a store, is in a sense, creating “storage”, or goods,
to then later be sold or used. In thermodynamics, the concept
of storing energy refers to this kind of containment as economical.
In architecture, ecological footprints, can trace the spent energy
in any structure, back to square acres of land, or square meters
of water, because basic units of measurement such as water and
earth are the basis for all products the earth produces, including
life.
Hygiene
is not just a good idea when dealing with water, hygiene is an
absolute must. Without good hygiene, there can’t be any
kind of healthy use for the stored water. Living organisms that
thrive in clear and shallow pools, just love a good rainwater
storage tank, but people’s stomachs, as well as livestock,
or sometimes even crops, may not enjoy the organisms in the water.
So storage tanks MUST be kept hygienic! Cleanliness is essential.
And if the water is to be used for drinking, all the more vigilant
must a rainwater storage unit be.
Filtering
is an option in rainwater storage, and in today’s world
a very good idea. There are many different varieties of filters,
but they fall into three categories, mechanical, biological and
chemical. Any modern system will at the very least have a mechanical
filter which must be cleaned regularly in order to make sure that
the cleanliness and hygiene of the water can be kept under more
demanding control. Sand and gravel are wonderful mechanical filters
that mimic nature’s natural filtering system, and are widely
used in rainwater harvesting.
The very
concept of rainwater storage revolves around the whole idea of
economy. Rainwater is energy. Be it energy for a seedling or energy
for an ancient Redwood in the middle of the forest, rainwater
brings life. But once it hits the ground, it goes back into the
ground, then is purified by many layers, until it arrives once
again into underground reservoirs, or streams and rivers, until
finding its way to the surface, or the ocean, evaporates, and
then condensates into rain once again. One of the most important
factors in any good rainwater storage unit is that it is sound
and has no seepage of any kind, is kept sealed as to avoid contamination
and evaporation. The advantage of this is water for later on.
Water to drink, water to bath, water to irrigate plants and crops,
water for days when it simply will not rain.
Rainwater
storage is a way of conserving energy. Safe storage of rainwater
means excellent hygiene that avoids bad news organisms that thrive
in still water. Filtering systems should be in place to make the
storage of clean and drinkable rainwater a reality.
Economical use of the rain that drops from great Zeus’s
palace in the sky and the mere mortal, whom without the gods is
nothing, tries so desperately to collect it in pots and pales
while stranded in a desert. With water, this mortal may be able
to survive for just one more day of intense walking through arid
climates. Rainwater storage kept desert trading caravans alive
in antiquity, while crossing the desert; it can help a world in
desperate need of new and innovative solutions.
Drought
and water restrictions have driven market demand for domestic rain
water storages. Once a water-saving device saved for rural areas,
rain water storageare now part of the urban streetscape. Check out
some of the options currently available.
Bluescope Steel Waterpoint
This steel rainwater storage by Bluescope is the domestic equivalent
of the traditional rural water storage. The slimline version (pictured)
fits under the eaves of your house and provides water into the home's
mains system for use in toilets, cold water washing and outside
taps. The 3000 litre water harvesting system has been proven to
reduce both water consumption and stormwater discharge by 20 per
cent. The storages are made from AQUAPLATE steel and have a proven
high quality food grade polymer (plastic) liner which provides a
healthy clean-tasting water source. They are available in various
sizes from 480-4,000 litres.
Installed above or below ground
When planning the installation of a rainwater storage, it is important
to consider where it can be located on your property. In many cases
storages are installed above ground, especially when the storage
is being installed alongside an existing dwelling. However installing
the storage underground can be a good space saving solution. Click
here for more information.
Storage materials - selection criteria
When determing the type of storage to install, consider:
What ground surface preparation is required
Whether the vessel can be installed above or below ground
How easily the material is to repair
What manufacturer guarantee is available
An overview of types of storages available
Concrete storages
An ideal in-ground solution. Feature load bearing storage lids,
so they can be installed under garages or driveways. Click for more
information.
Metal/Steel storages
Extremely strong storages with polyethylene storage linings to prevent
corrosion and ensure water quality. Click for more information.
Poly/Plastic storages
Popular due to its lightweight material which makes for easy site
preparation and installation. Poly storages are now the most common
for household use and come in a variety of shapes, sizes and colours.
Click for more information.
Fibreglass storages
Corrosion resistant and sturdy, fibreglass storages are a relatively
expensive but long-lasting option. Click for more information.
Bladders & other new innovations
New space saving bladders and modular storage systems have been
developed in recent years. These water storage vessels provide wonderful
solutions, particularly for urban areas.
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