# What is the mean average rainfall?

## What is the mean average rainfall?

normal or average rainfall is the amount of precipitation that we expect per year (in a given area). it is obtained and set by calculating the average (mean) of precipitation recorded in an area during many years ( at least 30 years). Annual rainfall or precipitation is the sum of daily rainfall in a year. Cite.

## How is average annual rainfall calculated?

(i) Annual rainfall = Sum of rainfall in all twelve months. Therefore, annual rainfall is 129.2 cm. The total annual rainfall = Sum of rainfall in all twelve months.

How do you calculate rainfall?

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.

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What does mean monthly rainfall mean?

Mean rainfall (mm) The arithmetically averaged total amount of precipitation recorded during a calendar month or year.

### How do you calculate annual rainfall from monthly rainfall?

The sum of rainfall in all the twelve months = to the annual rainfall.

### How do you calculate rainfall depth and intensity?

Rainfall intensity is often Rainfall Depth over a particular time. You need to accumulate the rainfall data for the the time step you are interested and then divide by that time. If you have rainfall intensity already, just multiply by the time step to get the depth.

What does 1mm rain 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.

How do you calculate rainfall intensity from monthly rainfall?

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Formula Of Rainfall Intensity The intensity of rainfall (p) in mm/hr is given by the following general formula: p = 254a / (t+b) mm/hr Where, t = Duration of storm in minutes, a and b are constants. a = 30 and b = 10 when t is 5 to 20 minutes. a = 40 and b = 20 when t is 20 to 100 minutes.

## How do you calculate rainfall data?

please visit the attached link or https://data.gov.in/. you will find rainfall data like attached file “METEOROLOGICAL SUB DIVISION WISE ANNUAL RAINFALL ” and same fromm this website. this Open Government Data (OGD) Platform India – data.gov.in – is a platform for supporting Open Data initiative of Government of India.

What does 50mm rain mean?

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. Heavy shower: Greater than 10 mm per hour, but less than 50 mm per hour. Violent shower: Greater than 50 mm per hour.

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How many mm of rain is 1cm?

10 millimetres is a centimetre and there are 100 centimetres in a metre so you have 1 cm of rain over 100 × 100 = 10000 square cms. That is a volume of 1 × 10000 = 10000 cubic centimetres.