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Water

Water is a chemical compound with the chemical formula H20. A water molecule contains one hydrogen atom and two oxygen atoms. Water is a liquid at standard ambient temperature and pressure though it can be a solid (ice)in low temperatures or evaporate into water vapor a higher temperatures.

Contributors in Water

Water

Domestic water use

Natural environment; Water

Water used for household purposes, such as drinking, food preparation, bathing, washing clothes, dishes, and dogs, flushing toilets, and watering lawns and gardens. About 85% of domestic water is ...

Inflow

Natural environment; Water

Entry of rainwater into a sewer system from sources other than infiltration, such as basement drains, manholes, storm drains, and street washing.

Phreatic zone

Natural environment; Water

The area in an aquifer in which relatively all pores and fractures are saturated with water. The phreatic zone may fluctuate with changes of season and during wet and dry periods. Compare vadose ...

Subsistence flows

Natural environment; Water

The component of an instream flow regime that represents infrequent, naturally occurring low flow events that occur for a seasonal period of time. They maintain water quality criteria and provide ...

Aquatic ecosystem

Natural environment; Water

Basic ecological unit composed of living and nonliving elements interacting in an aqueous milieu.

Downgradient

Natural environment; Water

The direction that groundwater flows; similar to "downstream" for surface water.

Influent

Natural environment; Water

The stream of water that enters any system or treatment unit.

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