What is rain gauge data?

A rain gauge (also known as an udometer, pluviometer, ombrometer, and hyetometer) is an instrument used by meteorologists and hydrologists to gather and measure the amount of liquid precipitation over an area in a predefined area, over a period of time.

Why is collecting rain data important?

Weather forecasts are based on complex mathematical equations where the variables are determined through observations such as precipitation amount and intensity. So, precipitation measurement is important for weather forecasting. What else, precipitation is a resource of fresh water.

Where can I get precipitation data?

How do I use the site?

Start at https://gis.ncdc.noaa.gov/maps/ncei/summaries/daily.
In the first window, click Daily Summary Observations.
Set the DATE and TYPE of data you want.
Choose WHERE you want it for.
Preview and/or Download the data.
If you want to download a station’s data in another format:

How is rain gauge calculated?

Here’s what you’ll need to do:

Measure the diameter of the bucket at the level of the rain.
Measure the diameter of the bucket at the bottom in the same way.
Calculate the average of the two diameters.
Divide by two to find the average radius.
Find the average volume of rain = Depth x radius x radius x 3.14.

What are the types of rain gauges?

The three major types of rain gauges are the standard gauge, tipping bucket gauge and weighing gauge.

How do you measure rainfall at home?

How is precipitation 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.

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 is the formula of rainwater?

For calculation we take the following formula: mean annual rainfall in mm x area in m² x runoff factor = collected rainwater in litres. In our example this means: 450 x 120 x 0.9 = 48 600 litres.