Rain gauge
The rain gauge is a glass bottle or jar 51 cm long and 21 cm in diameter. The bottle is kept in an iron cylinder. A 21 cm diameter funnel or cup is attached to the mouth of the bottle. This is called a funnel. The diameter of the mouth of the funnel is 10 times larger than the mouth of the bottle. This device for measuring rain is kept in a flat, open, and safe place. So that the plants, buildings do not create any obstacle to rainwater.
The mouth of the funnel has to be placed 30 cm above the ground so that no water other than rainwater can enter the mouth of the funnel. When it rains, the rainwater falls into the mouth of the funnel and collects in the bottle. After the specified time i.e. 24 hours, the rainwater collected in the beetle is poured into a glass container. The smallest spots in a glass jar are millimeters or inches. If the area of the mouth of the funnel is equal to the area of the water measuring glass container and the water rises to a height of 12 cm in the measured container, then it is understood that 12 cm of rain has fallen in that place.
To measure the rain, remove the funnel and the bottle from the top of the rain gauge. Then the water stored in the bottle should be poured gently into the measuring container. After pouring water into the pot, the pot should be kept upright in the same place. Then the size should be taken to match the skin on the pot. In other words, after pouring rainwater in a glass container, if the water touches the house of 3 cm in the container, then it should be understood that 3 cm rain has fallen in that place in 24 hours. Places with less than 254 millimeters (10 inches) of annual rainfall are called deserts. When the annual rainfall is between 254 and 506 millimeters (10-20 inches), some green plants grow there. However, the amount of rainfall required for agriculture should be more than 506 millimeters (20 inches) per year.
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