What is the rainfall of one millimeter?

1mm precipitation refers to the water depth per unit area1mm. 1mm How much precipitation falls into the field? The area per mu is 666.7m2, so the precipitation of 1mm is equivalent to an increase of 0.667m3 of water per mu.

Every cubic meter of water is 1000 kg, so the precipitation of 1 mm is equivalent to watering about 650 kg of water per mu. According to the measurement, the rainfall of 5 mm can make the dry land soak 3 cm to 6 cm.

Extended data

Rainfall measurement

Rainfall is generally measured by rainfall pipes, so it may contain a small amount of dew, frost and pine branches. Meteorology, there is always precipitation in years, months, days, 12 hours, 6 hours or even 1 hour, and all the rain and snow falling within 6 hours melt into water, which is called 6-hour precipitation;

All the rain and snow falling within 24 hours melt into water, which is called 24-hour precipitation; A ten-day rain and snow melt into water, which is called ten-day precipitation ... In a year, all the rain and snow melt into water, which is called "annual precipitation".

Liquid precipitation is called rainfall, and sometimes the two are synonymous. The precipitation per unit time is called precipitation intensity, usually in millimeters per hour or millimeters per minute. The rainfall per unit time is called rainfall intensity.

The average annual rainfall of a place for many years is called the "average annual rainfall" of this place. For example, the average annual rainfall in Beijing is 532.0mm, and that in Shanghai is1166.1mm. ..

Precipitation refers to a weather phenomenon in which liquid water or solid water falls to the ground. Accurate measurement of precipitation is of great significance for weather forecast, climate analysis, monitoring and early warning of natural disasters such as floods, landslides and mudslides.

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