what diameter is the collecting cylinder and what is the collecting surface area ? like if water is collected through a funnel whats the radius of the cone of the funnel ?
i made a simple one myself ..non standard though
2007-07-21 22:31:09 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Weather
The most common rain gauge found at weather offices is the standard 8 inch rain gauge and has been used over 100 years. It consists of a large cylinder with a funnel and a smaller measuring tube inside of it. The dimensions of this instrument are very specific so water that collects in the measuring tube has exactly one-tenth the cross sectional area of the top of the funnel. The reason for the smaller measuring tube is so that more precise rainfall measurements can be made due to the exaggeration of the height of water in the tube...
2007-07-21 23:17:04 · answer #1 · answered by Pro bono publico 4 · 1⤊ 0⤋
The standard raingauge is 8" for countries using imperial measurements and 200mm for those using metric. In Australia, because we were in imperial units for a very long time, the 8 gauge is still used although it is now the 203mm rangauge. Raingauges last for decades and seldom need replacing.
Five inches was the standard diameter for a Dines tilting syphon pluviograph and I have seen some 11" gauges but 8" or 200mm is the world standard.
2007-07-22 13:35:40 · answer #2 · answered by tentofield 7 · 0⤊ 0⤋