Rain Gauges and how to make one.

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How do I make a rain gauge?

Postby Beef_Taco » Tue Aug 15, 2006 2:29 pm

Make a rain gauge? You guys seem to have one and I wouldn't mind one. Do I have to buy it, or can I make it out of every day things?

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Postby Tim S » Tue Aug 15, 2006 2:41 pm

Hey Beefy, you can make one, though it is probably easier (and Cheaper) to buy one. I got my 'anolog' gauge from National Geographic for around $25 though I think you can buy em at bunnings and a few other places for a bit cheaper.

Failing that just use a bucket, using the area of a circle equation, area=pi x radius^2, you can work out how many mm you have by how many litres you get in the bucket, remembering that 1 litre per m^2 equals 1mm. :)
Kia Kaha, stay strong, live long and above all have fun. :)

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Postby squid » Tue Aug 15, 2006 4:25 pm

it is a good idea to get a rain gauge that measure up to 150mm just in case of on the rare chance that perth gets 200mm in 24 hrs :wink:

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Postby Tom M (Chaser 80) » Tue Aug 15, 2006 6:25 pm

BT just go to Bunnings, there are 3 or 4 to choose from. start at around $4

Or depending on how much you want to spend you can go here. http://shop.weatherzone.com.au/index.ph ... 9cf7089cf7

They have heaps of rain gauges.

I actually have a wired Lacrosse copy one that I dont use, Like this http://shop.weatherzone.com.au/product_ ... 9cf7089cf7 that has a self tipping rain bucket, and measures at 0.5mm per tip, if you would like it for $30 or so? Perfect condition I bought it from Jaycar, cost $60 I think. Has a 10m cable between the bucket and the display. but you could lengthen it if you wanted.

Tom

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Postby Tim S » Tue Aug 15, 2006 8:29 pm

hey I might want your gauge Tommo, I am getting sick of getting wet slippers measuring mine in the morning! I'll give yah $25 :P :)
Kia Kaha, stay strong, live long and above all have fun. :)

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Postby Tom M (Chaser 80) » Wed Aug 16, 2006 12:36 pm

No dramas. Sold Tim! You know the one it is, I used it on that cloud spotting chase we went on!! :D :wink: It actually tips at 0.518mm. So thats why it adds 0.1mm every few tips.

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Postby Tim S » Wed Aug 16, 2006 1:04 pm

sweet! :)

Ahh the famous Cloud spotting tour of 05 ;) My we saw some great cumulus that day, cumulus humulus if I remember correctly 8) :D
Kia Kaha, stay strong, live long and above all have fun. :)

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Postby Tim S » Mon Aug 21, 2006 3:59 pm

Thanks Tommo! the gauge is up and installed on my ex Foxtel dish support pole, will get its first test tonight I am sure. :)
Kia Kaha, stay strong, live long and above all have fun. :)

mattweather

Postby mattweather » Mon Aug 21, 2006 4:02 pm

I got my from Southport Mitre 10 :wink: Which was $30 and it full 1000mm rain guage.

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Postby Tim S » Mon Aug 21, 2006 4:32 pm

1000mm?! wowzers they make em big over on the east coast dont they! :)

my manual gauge only goes to 40mm :oops: :)
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Postby squid » Mon Aug 21, 2006 10:11 pm

1000mm i did not know that there was a 1000mm one i though the biggest was 150mm.

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Postby Beef_Taco » Tue Aug 22, 2006 5:54 am

I could have sworn i made a 'thank you' post but meh.

Cheers guys, i'll go to bunnings on the weekend.

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Postby Monsoonal-Maiden » Tue Aug 22, 2006 11:00 am

WOW :shock: 1000ml

Took me a while to find one that holds 250ml! (Bunnings Geraldton) I didn't think 150ml would cut it for our summer rains. I bought mine back in May, and apart from one night that I caught 20ml and 3 frogs, I have not had any rain yet to use it.

mattweather

Postby mattweather » Tue Aug 22, 2006 1:56 pm

There are 1000ml that includes my weather station :wink: I take a photo and show all of you soon.

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Postby squid » Tue Aug 22, 2006 1:58 pm

i think i will; invest in a 250mm one when i get one

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Postby MikeF » Tue Aug 22, 2006 2:25 pm

The 250mm ones are good but you should get one that overflows when it gets over an inch and then collects in the base of the raingauge. This way you can carefully tip out the overflowed amount into the collector and add it all up.

Image

I remember using one of these raingauges to measure 166mm overnight at my brothers farm. Also at the time we where cut off from Esperance as the river had washed the bridges away.

We had to go a long way north to get though.

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Postby Tim S » Tue Aug 22, 2006 5:02 pm

166mm! thats a good fall for the SW, when was that?

Heres a question for the mathemeatically minded here, how would you work out the area of an eclipse or oval, that is not a perfect circle?
Kia Kaha, stay strong, live long and above all have fun. :)

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Postby MikeF » Tue Aug 22, 2006 6:43 pm

In mathematics, an "oval" is more correctly called an ellipse, and the
area of an ellipse is given by Pi*a*b, where 2*a is the length of the
longer side (measured at its greatest width) and 2*b is the length of
the shortest side (measured at its greatest height). (Doctor Paul)
Reference Address

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Postby Beef_Taco » Tue Aug 22, 2006 7:19 pm

A couple of questions:

Where's the ideal spot to put a gauge? Somewhere easy and accesseble that won't be blown over, obviously, so where? Also needs to catch rain. :/

Also, Do i have to mathematically work out the reading everytime it rains, or can you get gauges that actually tell you?

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Postby Tim S » Tue Aug 22, 2006 8:43 pm

Hey Beef the best place to put a gauge is anywhere it wont get effected by trees or buildings. The easiest way to work this out is to find the place where you can see the most sky in all directions and that'll be your best spot. Roofs are good places for automatic gauges, as long as they arent too exposed to wind, but the ground is probably best, just as long its out of the way of the sprinklers/dogs :)

Rain gauges have measurements on the side that tell you the amount of rain you have in your gauge, so its just a matter of holding it up and reading it, if you get an electronic gauge, it tells you how much rain you have had :)
Kia Kaha, stay strong, live long and above all have fun. :)

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