Monday, July 14, 2008

Hope we will never have snowfall in Sri Lanka!!!

Measuring Snowfall.....

This is an obviously an obsolete topic for Sri Lanka however, as all of us in the Disaster Management class were very keen on knowing how to measure snowfall, this article was published.

Equipment needed:

Usual 8’ rain gauge without the inner tube and the funnel – this helps to collect the solid snow with ease.
Snowboard - a flat board, painted white, ideally about 16" x 16". This can be marked with a falg or so to find it after the snowfall.

There are 3 measurements with regards to snow fall:
1. Precipitation – the water content of snow
To measure the water content of snow with this type of gauge, you will need to
melt the contents ( by adding measured amount of warm water for example)
and put them into the inner cylinder.
2. New Snow Amount
Snowfall is the maximum accumulation of fresh snow during the past day prior to melting or settling. This is measured on the snow board using your ruler.
3. Snow depth - Total depth of snow on the ground
This is the total depth of snow on ground at your scheduled observation time
4. Snow Cores - Core Precipitation
If you think that all the snow has not fallen into the cylinder and has rolled down on its outer walls, example in windy conditions, you can take core precipitation. After measuring the precipitation, you cut a cylinder of fresh snow using the gauge for example on the snow board, collect the snow, melt it and add it to the precipitation.

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