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Q.

How is rainfall measured in mm?

Asked by Rohit Sharma, 19 Jun '07 11:20 am
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Answers (21)

1.

Rainfall is typically measured using a rain gauge. It is expressed as the depth of water that collects on a flat surface, and is routinely measured with an accuracy up to 0.1 mm or 0.01 in. Rain gauges are usually placed at a uniform height above the ground, which may vary depending on the country. There are two types of gauge: 1. Storage Rain gauge: These are used to make daily or monthly measurements. 2. Recording Rain gauges: Can measure the intensity of rainfall using a 'tipping bucket' which will only tip when a certain volume of water is in it. An electrical switch can be used to record the tips.
Answered by suresh bhol, 19 Jun '07 12:48 pm

 
  
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2.

The simplest way of measuring the rainfall is by a measuring gauge.
there are other sophistcated means too for measuring it.
Go through the details for an idea.

Precipitation Radar (PR):-
The Precipitation Radar is the first spaceborne instrument designed to provide three-dimensional maps of storm structure. The measurements yield information on the intensity and distribution of the rain, on the rain type, on the storm depth and on the height at which the snow melts into rain. The estimates of the heat released into the atmosphere at different heights based on these measurements can be used to improve models of the global atmospheric circulation.

TRMM Microwave Imager (TMI):-
The TRMM Microwave Imager (TMI) is a passive microwave sensor designed to provide quantitative rainfall information over a wide swath under the TRMM satellite. By carefully measuring the minute amounts of microwave energy emitted by the Earth and its atmosphere, TMI will be able to quantify the water vap ...more
Answered by GOPI KUMAR, 19 Jun '07 11:29 am

 
  
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3.

Easiest way to measure rainfall, get a funnel of 1square feet and place it on bottle or vessel now place this vessel is an open area, bottle/vessel should have exact width or radious of 1 feet, now after the rain fall just measure the hieght of water collected in the vessel. if height is 1 cm than it rained 1 cm in a square feet of area.
Answered by raj singh, 19 Jun '07 12:13 pm

 
  
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4.

What Raj Singh answered, i wud like to correct it ,Its not the 1square feet ,This is 1SQUARE METER
Answered by pankaj SRIVASTAVA, 19 Jun '07 01:19 pm

 
  
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5.

Raj Singh has given us the easiest method which is highly practical
Answered by varghese, 19 Jun '07 01:01 pm

 
  
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6.

keep a beaker/vessel with a flat bottom and perfectly vertical walls in the open under open skies.Measure the height of rain water collected in mm.Thats it :)
Answered by Vipin Gupta, 19 Jun '07 06:05 pm

 
  
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7.

with rain gauge.
Answered by arun mishra, 19 Jun '07 11:20 am

 
  
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8.

Just keep a pot in front of your corridor. When rain will stop then go and see the pot and take a scale and measure the quantity of water in the pot from bottom to top. Then you will automatically know the milimetres of rain.
Answered by Pradeep Satapathy, 23 Jun '07 08:42 pm

 
  
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9.

Answer given by suresh bhol is easy and understandble. The measuring of rainfall is done /still done manually trough raimgauge and an average is taken out of 3-5 readings, gauge is generally marked in mms.
Answered by surendra tripathi, 19 Jun '07 05:17 pm

 
  
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10.

same ans as suresh bhol
Answered by shruti tunga, 23 Jun '07 02:09 pm

 
  
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