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By
Paul Mooney
We get our fair share of rain in the North East, so there should
be no shortage of study material!
The
standard Met Office rain gauge is a copper device which has a 5
inch rim, the edge of which sits 30cm above the ground.
To
buy one of these, along with a rainfall measure, would cost in the
region of £100, but you can make a simple alternative for your own
garden. Although this won't give you officially recognised measurements,
it will allow you to keep your own records and compare different
weather events and situations.
Basically
any container left in the open will collect rainwater. How about
using something that would otherwise be thrown away and add to our
ever growing mountain of litter?
We've
used an empty plastic fizzy pop bottle, 2 litre size. Simply cut
the bottle in half and essentially the bottom half is your new rain
gauge.
If
you leave this standing on your lawn or in your back yard it'll
blow all over the place, so you need to make it more stable.
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What
you'll need:
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A
plastic bottle
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A coat hanger
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Take
a piece of wire, an old coat hanger would do, and carefully bend
and twist it to make a holder for your gauge.
Make
part of the wire into a hook and secure to the top edge of a fence
or shed.
Ideally
the rain gauge should be in a place where it is exposed to the elements.
It's no good hanging it under the eaves of your house, it'll never
collect any rain there.
Use
your new rain gauge along with your barometer to record the weather
patterns.
For
instance, watch for times when the air pressure falls and you end
up with a half-full rain gauge, or days when the pressure is rising
and you manage to collect no rain at all.
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| The
finished rain gauge |
Keep
a note of your readings and measurements in a book and also try
and note your observations of how the sky looked - was it blue,
overcast, and so on.
Observing
what's going on around us, weather-wise, in this way is a great
way for children in particular to learn, but none of us are ever
too old to learn, are we?
Don't
get me wrong, your home-made weather station isn't going to instantly
unravel the forces of nature that govern our weather, but then neither
is buying a £40 million super computer!
In
our next instalment how about we try and make a rainfall radar system
using a dustbin lid and an empty washing up liquid bottle? No? Ok
then, we'll try and make a wind vane! .
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