The gauge has a sharp brass or steel rim of diameter 5 inches (127 mm), sited 30 cm above ground level with a funnel that collects rain in a narrow necked bottle placed in a removable can. To make the rainfall measurement, the observer empties the collected rain into a graduated glass rain measure.
What is the unit of measurement for a rain gauge?
mm
How do you measure water in a rain gauge?
U.S. standard rain gauge When measurements are taken, then the height of the water in the small graduated cylinder is measured, and the excess overflow in the large container is carefully poured into another graduated cylinder and measured to give the total rainfall.
How do you read a rain gauge in MM?
https://www.youtube.com/watch?v=JVOxLrMaWA8
What does 1 cm rainfall mean?
1 cm of rainfall means that a volume of water equal to 10 L has fallen over an area of 1 m²; ergo, the basic conversation for rainfall depth (say mm) to volume is: 1 mm of rainfall depth equates to 1 L of rainwater per m².
How is rain measured?
The standard instrument for the measurement of rainfall is the 203mm (8 inch) rain gauge. This is essentially a circular funnel with a diameter of 203mm which collects the rain into a graduated and calibrated cylinder. The measuring cylinder can record up to 25mm of precipitation.
Is 2 cm of rain a lot?
Slight rain: Less than 0.5 mm per hour. Moderate rain: Greater than 0.5 mm per hour, but less than 4.0 mm per hour. ... Moderate shower: Greater than 2 mm, but less than 10 mm per hour. Heavy shower: Greater than 10 mm per hour, but less than 50 mm per hour.
How is rainfall mm calculated?
Bob says rain is measured in a rain gauge its depth is measured in millimetres (mm). So 1 mm of rain = 1L per square M.
What does 1 mm rainfall mean?
However, 1 mm of rain refers to the "depth" of rain that would be received in 1 meter² (m²) or a square of one metre in length and width. So 1 mm of rain translates to 1 litre of water in a single metre square.23 jul 2021