how to calculate rainfall volume

How To 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.Sep 16, 2013

What is volume of rainfall?

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.

How do you calculate rainfall in litres?

Roughly speaking, 1 millimetre of rain over 1 square metre of roof equals 1 litre of water. This capacity can be calculated using the following formula: Annual rainfall (in millimetres) x Roof surface area (in square metres) = Roof catchment capacity.

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.

How do you calculate annual rainfall?

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

Is 2 inches rain a lot?

Rainfall rate is generally described as light, moderate or heavy. Light rainfall is considered less than 0.10 inches of rain per hour. Moderate rainfall measures 0.10 to 0.30 inches of rain per hour. Heavy rainfall is more than 0.30 inches of rain per hour.

How many gallons of rain is in a inch?

27,154 gallons
Volume and weight

One inch of rain falling on 1 acre of ground is equal to about 27,154 gallons and weighs about 113 tons. An inch of snow falling evenly on 1 acre of ground is equivalent to about 2,715 gallons of water.

Is 1 inch rain a lot?

One (1.00) inch of rain – A light moderate rain never reaches this amount, heavy rain for several hours (2-5 hours). There would be deep standing water for long periods of time.

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What is 1cm rain?

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 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.

Is rain measured in mm or ML?

The most common rainfall measurement is the total rainfall depth during a given period, expressed in millimeters (mm). For instance, we might want to know how many millimeters of rain fell over the course of 1 h, 1 day, 1 month, or 1 year. You can easily get a rough measurement of rainfall depth at home.

How is rainfall calculated in India?

Rainfall is measured by means of rain gauges.

Location of Rain Gauges:
  1. The opening of the rain gauge should be at least 75 cm above the ground level.
  2. The rain gauge should be located in an open space free from obstructions. …
  3. Uneven topography should be avoided and the rain gauge should be located on a level ground.

What is 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.

What is actual rainfall and normal rainfall?

Normal” precipitation does not equal “what you should expect.” “Normal” precipitation to a meteorologist is an average of the precipitation values over a 30-year period. Precipitation may very often be either well above or well below the seasonal average, or “normal.”

how to calculate rainfall volume
how to calculate rainfall volume

How do you calculate rainfall in geography?

The total annual rainfall = Sum of rainfall in all twelve months. Therefore, annual rainfall is 128.7 cm. 2) The annual range of temperature = Maximum temperature − minimum temperature.

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What is the record for most rain in one hour?

12 inches
The record for most rainfall in a single hour is 12 inches (30.5 cm), set in Holt, Missouri, in 1947.

What is considered heavy rain?

Heavy rain — when the precipitation rate is > 7.6 mm (0.30 in) per hour, or between 10 mm (0.39 in) and 50 mm (2.0 in) per hour. Violent rain — when the precipitation rate is > 50 mm (2.0 in) per hour.

How many inches of rain is considered a flood?

In general, two or three inches of rain per hour creates only minor street flooding. Yet if eight to 10 inches pours down in a hour or two, roads usually are severely flooded and canals overflow. That’s when the National Weather Service issues flash flood warnings.

How do you calculate gallons of rain?

To find how much rain you can collect in an average rain year multiply this number by the average inches of rain. For example, on a 2,000 square foot roof, you can collect 2,000 x 0.56 = 1,120 gallons/inch of rain.

How do you calculate gallons of water in rain?

Multiply the previous result by one inch of rainfall. The result is that one inch of rain yields 4,014,489,600 cubic inches of water per square mile. Divide the result by 231 cubic inches per gallon, and obtain the result of 17,378,743 gallons per square mile for an inch of rainfall.

What are the four types of rainfall?

The different types of precipitation are:
  • Rain. Most commonly observed, drops larger than drizzle (0.02 inch / 0.5 mm or more) are considered rain. …
  • Drizzle. Fairly uniform precipitation composed exclusively of fine drops very close together. …
  • Ice Pellets (Sleet) …
  • Hail. …
  • Small Hail (Snow Pellets) …
  • Snow. …
  • Snow Grains. …
  • Ice Crystals.

What does 2 inches of rain look like?

Is 6 inches of rain in a month a lot?

State-wide averages of monthly precipitation in summer range from a high of 7.13 inches (181 millimetres) in Florida to a low of 0.27 inches (7 millimetres) in California. For the entire United States, excluding Hawaii and Alaska, the average amount of moisture falling as rain and snow is 2.79 inches (71 millimetres).

What is the most amount of rain in 24 hours on Earth?

1,825 mm
According to the World Meteorological Organization, a record 1,825 mm (71.8 in) of rain fell in 24 hours at Foc-Foc (elevation: 2,990 m; 9,810 ft) on the French island territory of Réunion in the Indian Ocean on 7–8 January 1966. The event occurred during the passage of tropical cyclone Denise.

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What is 20cm rain?

Measuring rainfall as a depth has become an international standard mainly because it is very easy to convert depth to volume; in fact, the main conversion factor is 1 mm of rainfall = 1 Liter of water/m² (or 0.001 m³ of water/m²); thus, to answer your question, 200cm or rainfall (or 2000 mm) means that every squared …

How do we measure rainfall in mm?

How bad is 1mm of rain?

1mm rain over two hours is barely a mist. It means rain caught in a measuring device will pool up to a height of 1mm. In 5 minutes for 1mm to fall things will get wet. Generally the sidewalks or road may get wet and in a dry climate be dry in half an hours or less.

How Much Is 70mm of rain in inches?

Inches to Millimetres Conversion Table – 1 to 200 inches
Inches (in) Millimetres (mm)
69 1752.6
70 1778
71 1803.4
72 1828.8

Is 0.02 inches of rain a lot?

Rain: Precipitation in the form of liquid water drops that have diameters greater than 0.5 millimeter; if less than 0.5 millimeter, it is drizzle. … Drizzle is classified as light, falling at a rate from a trace to 0.01 inch per hour; moderate, 0.01 to 0.02 inch per hour; heavy, greater than 0.02 inch per hour.

How do you read a rain gauge?

How much rain is 7mm?

7mm rain is the metric measurement of the amount of rain fallen in a given period of time. For example, one hour or one day. Somewhere around roughly a quarter inch in English measurement.

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