Dual Layer Dvd: Rain Gauge

Friday, 2 November 2012

Rain Gauge

A rain gauge (also known as a udometer or a pluviometer 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 over a set period of time.The first known rainfall records were kept by the Ancient Greeks, about 500 B.C. This was followed 100 years later[citation needed] 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.
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.In 1662, Christopher Wren created the first tipping-bucket rain gauge in Britain.