from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The scientific study of the properties, distribution, and effects of water on the earth's surface, in the soil and underlying rocks, and in the atmosphere.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The science of the properties, distribution, and effects of water on a planet's surface, in the soil and underlying rocks, and in the atmosphere

from the GNU version of the Collaborative International Dictionary of English

  • n. The science of water, its properties, phenomena, and distribution over the earth's surface.

from The Century Dictionary and Cyclopedia

  • n. The science of water, its properties, phenomena, and laws, its distribution over the earth's surface, etc.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. the branch of geology that studies water on the earth and in the atmosphere: its distribution and uses and conservation


hydro- + -ology (Wiktionary)


  • So instead of being buried in concrete, excised from the daily life of the city and only experienced by municipal workers, urban hydrology is visibly, even prominently, incorporated into the surface fabric of the city.

    Turning Rainwater Into a Playground

  • For a Chicago-based blog with an extraordinarily abnormal interest in hydrology, hydroengineering and hydropolitics, this is downright criminally negligent.

    Archive 2007-05-01

  • I also asked him about my theory that site effects depend mostly on hydrology, which is what we are finding here at Fox Run (water-retentive soils make better grapes in dry years, while well-drained soils make better wine in wet years – keep in mind that these are non irrigated vineyards).

    TasteCamp 2009: An Interview with Nick Gorevic

  • Other than that, he's taken some post-graduate courses in hydrology.

    Dumbest quote

  • Snyder said the corps is updating two components for its analysis: hydrology, which is the amount of water at each location, and hydraulics, which is how water moves through the river system.

    Homepage | INFORUM | Fargo, ND

  • The AGU hydrology group has over 6,000 members who call hydrology their primary field. Headlines

  • In science terms, there is a cycle called the hydrology cycle, and this cycle tells the story of natural water. News

  • Let's step outside the sciences of biology and hydrology which is, not the science of geological strata -- that would be geomorphology -- but the science of the behavior of water at the earth's surface.

    You said it | RELIGION Blog |

  • The term "hydrology" arrived in its current meaning around 1750, and by 1800 the work of English physicist and chemist groundwater flow had confounded scientists and created barriers to understanding the

    Featured Articles - Encyclopedia of Earth

  • The project as proposed by the Northern Colorado Water Conservation District requires additional analysis in areas such as hydrology modeling, water quality, vegetation and aquatic resources, said Col. David Press, commander of the Corps 'Omaha District. - Local News


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