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 all known 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%).
Selected article -
Potential peak water curve for production of groundwater from an aquifer.
is a concept that underlines the growing constraints on the availability, quality, and use of Peak water freshwater resources.
Peak water was defined in a 2010
article in the
Proceedings of the National Academy of Sciences
and Meena Palaniappan. They distinguish between peak renewable, peak non-renewable, and peak ecological water in order to demonstrate the fact that although there is a vast amount of water on the planet,
managed water is becoming scarce.
Did you know - 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)
A view of the Rosoki River in the eponymous village, Macedonia
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.
Rain over Beinn Eich,
Luss Hills, Scotland
Waterfall Shypit (height 14 m), Mizhhiria Raion, Zakarpattia Oblast of western Ukraine
Waves on rocks at sunset in
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.
World map for
SDG 6 Indicator 6.1.1 in 2015: "Proportion of population using safely managed drinking water services"
EPA drinking water security poster from 2003
The three common states of matter
Water can be used to cook foods such as
sustainable development goal 6
% of the population with access to drinking water
Water requirement per tonne of food product
ALMA receiver is an instrument specifically designed to detect water in the universe.
An estimate of the proportion of people in developing countries with access to
potable water 1970-2000
Phase diagram of water simplified
South polar ice cap of Mars during Martian south summer 2000
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.
Illustration of a typical drinking water treatment process
Total water withdrawals for agricultural, industrial and municipal purposes per capita, measured in cubic metres (m³) per year in 2010.
Water availability: fraction of population using improved water sources by country
Sterile water for injection
Tetrahedral structure of water
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 Associated Wikimedia