How is rainfall measured? Detailed answer

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How is rainfall measured? Detailed answer

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How is rainfall measured?

In many countries, rainfall is measured with a device called a rain gauge. The rain gauge used by United States meteorologists is a hollow tube closed at the bottom and flared at the top. This device is placed in an open area, and a graduated scale on it shows how much rainwater has entered it. Meteorologists say that an inch of rain fell if enough water fell in a given area to form a layer of water one inch thick on the surface of that place.

A place where less than 10 inches (25 centimeters) falls annually is called a desert. Ten to twenty inches is enough for grass to grow, but more than 20 inches is required for agriculture. If more than 250 centimeters of precipitation falls during the warm season, wild vegetation becomes so dense that it drowns out cultivated plants. This happens in the jungles of Brazil, in Central Africa and in India. There is a place in India called Cherrapunji where about 1140 centimeters of rain falls a year!

In contrast, Egypt receives only 4 centimeters of rain per year. In the United States, the most precipitation falls on the coast of Washington state and in Oregon - 200-250 centimeters. Some parts of Arizona receive less than 8 centimeters of rain per year. The highest rainfall recorded in the UK is 257 inches (653 centimeters) in Cumberland in 1954.

Author: Likum A.

Random interesting fact from the Great Encyclopedia:

Where and when was a bicycle race organized to escape to another country?

In 1915, a group of athletes from the Belgian Liege asked the commandant of the German occupation troops for permission to hold a bicycle race in order to raise funds to help the victims of the war. He agreed on the condition that each participant put a German flag on the bike. The route of the race was assigned from Liège to the village of Molingen near the Belgian-Dutch border. At the finish line, the cyclists did not stop and went straight to the Netherlands, which was a neutral state during the First World War, and the German soldiers guarding the track did not have time to prevent the fugitives.

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