What is meant by 1 cm 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.

How do you calculate rainfall volume?

Find the average volume of rain = Depth x radius x radius x 3.14. Find the area at the top of the bucket (this is the area over which the rain is collected). Divide the rainfall volume by this area to get the rainfall.

How do you find the volume of rain over an area?

Step 3: Calculating Your Harvestable Rainwater To calculate how much rainwater can be harvested, multiply your rainfall (mm) by your roof surface area (m2) being used to catch rainwater. The resulting number represents how many litres of water you can expect to collect.

How rainfall is measured in cm?

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 does 1 mm rainfall mean?

With a rainfall of 1 mm, every square metre receives 1 litre of rain water. A rainfall of 1 mm supplies 0.001 m3, or 1 litre of water to each square metre of the field. Rainfall is often expressed in millimetres per day (mm/day) which represents the total depth of rainwater (mm), during 24 hours.

Is 1 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. Heavy rain: Greater than 4 mm per hour, but less than 8 mm per hour. Very heavy rain: Greater than 8 mm per hour.

What is rainfall volume?

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. A rainfall of 1 mm supplies 0.001 m3, or 1 litre of water to each square metre of the field.

What is the volume of 1 inch of rain?

A standard Weather Service rain gauge is a cylinder eight inches in diameter, so one inch of rain would have a volume of about 28 ounces or about three cups. Measurements of very large volumes of water, such as lakes or reservoirs, are expressed in acre-feet.

How much is 1mm rain?

Mathematically speaking, 1 mm of rain translates to 1 litre of water in a single metre square. Or, 140 mm rainfall can fill an average cricket stadium with 23.8 lakh litres of water! After intense heatwaves, the world is now struggling with heavy rainfall and floods.

How many Litres is 1mm of rain?

With a rainfall of 1 mm, every square metre receives 1 litre of rain water. A rainfall of 1 mm supplies 0.001 m3, or 1 litre of water to each square metre of the field.

What does 10mm of rain mean?

Very heavy rain: Greater than 8 mm per hour. Slight shower: Less than 2 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 much is 1 cm of rain in inches?

1cm = 0.39370079 inches, 1 cm has roughly 0.39 inches in it, which can also be written as 1\2.54.

How to calculate volume of rainfall?

Volume of water can be easily measured by knowing the catchment area and height of the rainfall. The calculations are not exact but this volume of rainfall calculator can be used to easily detect the total amount of rainfall you can collect from the roof top, from the courtyard as well you can find the total run off over a particular land area.

What is the depth of the rain in 5 hours?

(1 inch = 25 mm) Answer: The depth of the rain was 1.6 inches x 25 mm/ 1 inch = 40 mm. This fell in the time between 8:00 am and 1:00 pm which is 5 hours, so the rate was 40 mm/5 hours = 8 mm/hr.

How do you measure volume of water in an area?

Volume of water can be easily measured by knowing the catchment area and height of the rainfall.

How much rain is considered heavy rain?

Heavy rain: Greater than 4 mm per hour, but less than 8 mm per hour. Very heavy rain: Greater than 8 mm per hour. Slight shower: Less than 2 mm per hour. Moderate shower: Greater than 2 mm, but less than 10 mm per hour.