What is the unit of rainfall intensity?

Rainfall intensity is defined as the ratio of the total amount of rain (rainfall depth) falling during a given period to the duration of the period It is expressed in depth units per unit time, usually as mm per hour (mm/h).

How is intensity of rainfall measured?

The intensity of rain is measured in the height of the water layer covering the ground in a period of time. It means that if the rain stays where it falls, it would form a layer of a certain height. We say things like: 30 millimeter of rain fell today or it rained 20 millimeter in two hours.

Why is rainfall unit mm?

So 1 mm of rain translates to 1 litre of water in a single metre square. So 802 mm of rain would mean that a single metre square would receive 802 litres of rain, 140 mm would mean 140 litres of water received in a single metre square, and so on.

Is rainfall measured in mm per m2?

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.

Why rainfall is measured in cm?

Although this is the principle followed in all rain gauges, the actual procedure adopted varies considerably from place to place and instrument to instrument. So when you see a rainfall reading in millimetres or centimetres, it is simply the height to which the collected water rose in the funnel of the rain gauge.

What is 0.1 mm rain?

When they do tip the rain gauge registers a precipitation depth of 0.1 mm. This is because if you poured 1 ml of water (which would occupy 1 cubic centimetre) out into a dish with a surface area of 100 cm² the depth of the water would be just 0.1 mm.

What is rainfall mm and cm?

The amount of rainfall is expressed as depth in centimeters (or millimeters) which falls on a level surface. Intensity of rainfall is the rate at which it falls at any one time. It is expressed as cm per hour or mm per hour. Rainfall is measured by means of rain gauges.

What is 1cm rainfall?

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.

What does 1 cm rainfall mean?

How do you convert mm of rain to liters?

In terms of volume, with a rainfall of 10 mm, every square metre of the field receives 0.01 m, or 10 litres, of rain water. With a rainfall of 1 mm, every square metre receives 1 litre of rain water.

How is intensity of rainfall classified?

Generally, the rainfall intensity is divided into five levels: micro rain, light rain, moderate rain, heavy rain and torrential rain.