Rain gauge

related topics
{island, water, area}
{@card@, make, design}
{car, race, vehicle}
{rate, high, increase}
{system, computer, user}
{math, energy, light}
{ship, engine, design}
{work, book, publish}
{acid, form, water}

A rain gauge (also known as a udometer or a pluviometer [Pluviograph ] or an ombrometer or a cup) is a type of instrument used by meteorologists and hydrologists to gather and measure the amount of liquid precipitation (solid precipitation is measured by a snow gauge) over a set period of time.



The first known records of rainfalls were kept by the Ancient Greeks about 500 B.C. This was followed 100 years later by people in India using bowls to record the rainfall. The readings from these were correlated against expected growth, and used as a basis for land taxes. In the Arthashastra, used for example in Magadha, precise standards were set as to grain production. Each of the state storehouses were equipped with a standardised rain gauge to classify land for taxation purposes.[1]

While some sources state that the much later cheugugi of Korea was the world's first gauge, other sources say that Jang Yeong-sil developed or refined an existing gauge.[2][3][4][5][6][7][8] In 1662, Christopher Wren created the first tipping-bucket rain gauge in Britain.[6]


Most rain gauges generally measure the precipitation in millimeters. The level of rainfall is sometimes reported as inches or centimeters.

Rain gauge amounts are read either manually or by AWS (Automatic Weather Station). The frequency of readings will depend on the requirements of the collection agency. Some countries will supplement the paid weather observer with a network of volunteers to obtain precipitation data (and other types of weather) for sparsely populated areas.

Full article ▸

related documents
Ice skating
Thrust fault
Malham Cove
Geography of the Bahamas
Lake Taupo
Year Without a Summer
Mid-Atlantic Ridge
Broome, Western Australia
Strait of Dover
List of tropical cyclones
Island Park, Idaho
Geography of Iceland
Morgan Hill, California
Delta Works
River Calder
Geography of Belgium
Grand Isle, Louisiana
Wollemi National Park
Culebra, Puerto Rico
Tethys Ocean