Water

Water (chemical formula: H₂O) is a transparent fluid which forms the world's streams, lakes, oceans and rain, and is the major constituent of the fluids of organisms. As a chemical compound, a water molecule contains one oxygen and two hydrogen atoms that are connected by covalent bonds. Water is a liquid at standard ambient temperature and pressure, but it often co-exists on Earth with its solid state, ice; and gaseous state, steam (water vapor). It also exists as snow, fog, dew and cloud.

Water covers 71% of the Earth's surface. It is vital for all known forms of life. On Earth, 96.5% of the planet's crust water is found in seas and oceans, 1.7% in groundwater, 1.7% in glaciers and the ice caps of Antarctica and Greenland, a small fraction in other large water bodies, and 0.001% in the air as vapor, clouds (formed of ice and liquid water suspended in air), and precipitation. Only 2.5% of this water is freshwater, and 98.8% of that water is in ice (excepting ice in clouds) and groundwater. Less than 0.3% of all freshwater is in rivers, lakes, and the atmosphere, and an even smaller amount of the Earth's freshwater (0.003%) is contained within biological bodies and manufactured products. A greater quantity of water is found in the earth's interior.

Water (Elitsa & Stoyan song)

"Water" (Bulgarian script: Вода) was the Bulgarian entry in the Eurovision Song Contest 2007, performed in Bulgarian by Elitsa Todorova & Stoyan Yankoulov. This was the first occasion on which the Bulgarian language was used on the Eurovision stage, previous Bulgarian entries being performed in English. Originally titled "Voda", the song had its title translated to English for the Contest.

The song is an up-tempo number with techno influences, as well as a jaw harp and traditional percussion. Todorova sings folk-inspired lyrics dealing with a young girl meeting a young boy riding a horse.

The performance in the semi-final featured the duo wearing what looked like armour, while they were wearing more mainstream clothes in the final. The performances were also notable for the high-energy percussion performances of both musicians.

As Bulgaria had not finished the previous Contest in the top ten, the song was performed in the semi-final. Here, it was performed first (preceding Israel's Teapacks with "Push The Button"). At the close of voting, it had received 146 points, placing 6th in a field of 28 and qualifying Bulgaria for its first final.

Water (Conor Oberst album)

Water is the debut album of Conor Oberst and the first release on Lumberjack Records, the label that would become Saddle Creek. He was only 13 years old at the time. It was released as a cassette tape, and came in 300 copies only, in five different colors on the covers (yellow, blue, green, brown and white).

Track listing

All songs by Conor Oberst.

Credits

Irrigation in viticulture

Irrigation in viticulture is the process of applying extra water in the cultivation of grapevines. It is considered both controversial and essential to wine production. In the physiology of the grapevine, the amount of available water affects photosynthesis and hence growth, as well as the development of grape berries. While climate and humidity play important roles, a typical grape vine needs 25-35 inches (635-890 millimeters) of water a year, occurring during the spring and summer months of the growing season, to avoid stress. A vine that does not receive the necessary amount of water will have its growth altered in a number of ways; some effects of water stress (particularly, smaller berry size and somewhat higher sugar content) are considered desirable by wine grape growers.

In many Old World wine regions, natural rainfall is considered the only source for water that will still allow the vineyard to maintain its terroir characteristics. The practice of irrigation is viewed by some critics as unduly manipulative with the potential for detrimental wine quality due to high yields that can be artificially increased with irrigation. It has been historically banned by the European Union's wine laws, though in recent years individual countries (such as Spain) have been loosening their regulations and France's wine governing body, the Institut National des Appellations d'Origine (INAO), has also been reviewing the issue.

Tidal irrigation

Tidal irrigation is the subsurface irrigation of levee soils in coastal plains with river water under tidal influence. It is applied in (semi)arid zones at the mouth of a large river estuary or delta where a considerable tidal range (some 2 m) is present. The river discharge must be large enough to guarantee a sufficient flow of fresh water into the sea so that no salt water intrusion occurs in the river mouth.

The irrigation is effectuated by digging tidal canals from the river shore into the main land that will guide the river water inland at high tide.

For the irrigation to be effective the soil must have a high infiltration capacity to permit the entry of sufficient water in the soil to cover the evapotranspiration demand of the crop.

At low tide, the canals and the soil drain out again, which promotes the aeration of the soil.

See also

References