The Water Portal
is an Water inorganic, transparent, tasteless, odorless, and nearly colorless chemical substance, which is the main constituent of Earth's hydrosphere and the fluids of most living organisms. It is vital for all known forms of life, even though it provides no calories or organic nutrients. Its chemical formula is H 2O, meaning that each of its molecules contains one oxygen and two hydrogen atoms, connected by covalent bonds. Water is the name of the liquid state of H 2O at standard ambient temperature and pressure. It forms precipitation in the form of rain and aerosols in the form of fog. Clouds are formed from suspended droplets of water and ice, its solid state. When finely divided, crystalline ice may precipitate in the form of snow. The gaseous state of water is steam or water vapor. Water moves continually through the water cycle of evaporation, transpiration ( evapotranspiration), condensation, precipitation, and runoff, usually reaching the sea.
Water covers 71% of the
Earth's surface, mostly in seas and oceans. Small portions of water occur as groundwater (1.7%), in the glaciers and the ice caps of Antarctica and Greenland (1.7%), and in the air as vapor, clouds (formed of ice and liquid water suspended in air), and precipitation (0.001%).
Water plays an important role in the
world economy. Approximately 70% of the freshwater used by humans goes to agriculture. Fishing in salt and fresh water bodies is a major source of food for many parts of the world. Much of the long-distance trade of commodities (such as oil, natural gas, and manufactured products) is transported by boats through seas, rivers, lakes, and canals. Large quantities of water, ice, and steam are used for cooling and heating, in industry and homes. Water is an excellent solvent for a wide variety of substances both mineral and organic; as such it is widely used in industrial processes, and in cooking and washing. Water, ice and snow are also central to many sports and other forms of entertainment, such as swimming, pleasure boating, boat racing, surfing, sport fishing, diving, ice skating and skiing.
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that has been boiled into vapor and condensed back into liquid in a separate container. Impurities in the original water that do not boil below or near the boiling point of water remain in the original container. Thus, distilled water is one type of
Read more... Water News
Note: this section was updated in February 2020
Water topic page – from NASA
The World Water Assessment Programme – monitors freshwater issues and provides recommendations
Water Security – from UNESCO
Dundee UNESCO Centre – a portal for Water Law, Policy and Science from the University of Dundee
The Water Network – knowledge platform for water professionals to connect share knowledge
Watermonitor.gov – a portal to U.S. federal water information
Water Topics – from the U.S. EPA
Watershed News – from EPA
U.S. Department of Agriculture Water News – USDA
National Rural Water Association – NRWA news and press releases
India Water Portal – community-contributed water resources, articles, news, Q&A, data, events, opportunities, photos and videos.
Alberta WaterPortal – water news, info, events, and community
The New York Times Water topic page
The Guardian Water topic page The 2005 Preliminary Report of the Sustainable Water Resources Roundtable – Advisory Committee on Water Information ( inactive as of December 5, 2019) Did you know...
... that the
International Water Management Institute celebrated its 25th anniversary last year?
... that the
International Water Centre celebrated its 5th birthday last year?
... that the
National Rural Water Association represents more than 26,242 water and wastewater utility members?
... that "
water bears" are small, segmented animals that can survive in a dehydrated state for nearly 10 years?
... that there are at least 15 different forms of crystalline
water memory is a controversial homeopathic concept, which holds that water is capable of containing "memory" of particles dissolved in it?
... that there are more particles in a glass of water than grains of sand on earth?
... that there is a new definition for Earth's water cycle that includes the three "interactive"
cycles: cosmic water cycle; atmospheric water cycle, and oceanic water cycle (new ocean
recycled from center of Earth about every 7 million years)
The Water Channel TV
... that Agroforestry and hedges are solutions to build micro-climates and allow the circulation of water to inland thanks to the phenomena of evapotranspiration of plants. For example, one hectare of beech forest, which consumes 2,000 to 5,000 tonnes of water per year, yields 2,000 tonnes per evaporation (
https://www.onf.fr/onf/forets-et-espaces-naturels/+/1f::comprendre-la-foret.html french translation)
A view of the Rosoki River in the eponymous village, Macedonia
Rain over Beinn Eich,
Luss Hills, Scotland
fire hydrant in Alkmaar, the Netherlands. Fire hydrants are a source of water provided by most metropolitan communities to enable firefighters to tap into the municipal water supply to assist in extinguishing a fire.
Waves on rocks at sunset in
Waterfall Shypit (height 14 m), Mizhhiria Raion, Zakarpattia Oblast of western Ukraine
Select [►] to view subcategories Photo gallery
Note: this section was updated in February 2020
The following are images from various water-related articles on Wikipedia.
Water can be used to cook foods such as
South polar ice cap of Mars during Martian south summer 2000
A manual water
pump in China
Sterile water for injection
Water covers 71% of the Earth's surface; the oceans contain 96.5% of the Earth's water. The
Antarctic ice sheet, which contains 61% of all fresh water on Earth, is visible at the bottom. Condensed atmospheric water can be seen as clouds, contributing to the Earth's albedo.
and photosynthesis (green) . Water (at right), together with carbon dioxide (CO respiration (red) 2), form oxygen and organic compounds (at left), which can be respired to water and (CO 2).
Water availability: fraction of population using improved water sources by country
ALMA receiver is an instrument specifically designed to detect water in the universe.
Water requirement per tonne of food product
A water-carrier in India, 1882. In many places where running water is not available, water has to be transported by people.
An estimate of the share of people in developing countries with access to
potable water 1970–2000
Water in all three states: solid (ice), liquid and vapor (here mostly invisible
water vapor, cooling and condensing, is building clouds).
EPA drinking water security poster from 2003
Total water withdrawals for agricultural, industrial and municipal purposes per capita, measured in cubic metres (m³) per year in 2010.
Related portals Wikiprojects
describes the Earth's WikiProject Lakes lakes. The project aims to consolidate and unify pages relating to lakes around the world. Things you can do
Here are some
tasks awaiting attention: : Stubs Expand water stubs Other :
Invite water experts to contribute their information.
Add your expert knowledge for your local river at
WikiProject Rivers. Help rotate/refresh the three items in the "Did you know?" box.
Expand articles on local lakes at
WikiProject Lakes Write or improve an article on a country whose water sector you know well at Category:Water supply and sanitation by country