The relationship between rainfall and hydrostatic pressure
We often see waterproof indicators on jackets and pants, such as 5000, 20000, which refers to hydrostatic pressure, and the unit is millimeters. Waterproof 5000 means that a water column with a height of 5000 mm will not leak when pressed on the clothes, but this is only a static The standard, the specific life situation is shown in the following table:
Rainfall (mm/hour) Description of rainfall state Hydrostatic pressure conversion (mm H2O)
less than 1 drizzle 200-500
1-5 light rain 500-1000
5-10 Moderate rain 1000-2000
10-20 heavy rain 2000-5000
20-30 rainstorm 5000-10000
30-50 torrential rain 10000-20000
