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  2. Wetlands of the United States - Wikipedia

    en.wikipedia.org/wiki/Wetlands_of_the_United_States

    Regulations to protect water quality and highway safety require that we create arbitrary boundaries within those gradients, but these boundaries are scientifically definable, and consist of areas where three criterion of the presence of hydric soils, the presence of wetland vegetation, and the presence of appropriate hydrology.

  3. Water quality law - Wikipedia

    en.wikipedia.org/wiki/Water_quality_law

    Water quality laws govern the protection of water resources for human health and the environment. Water quality laws are legal standards or requirements governing water quality, that is, the concentrations of water pollutants in some regulated volume of water. Such standards are generally expressed as levels of a specific water pollutants ...

  4. Cowardin classification system - Wikipedia

    en.wikipedia.org/wiki/Cowardin_Classification_System

    Lacustrine wetlands- associated with a lake or other body of fresh water Palustrine wetlands- freshwater wetlands not associated with a river or lake. The primary purpose of this ecological classification system was to establish consistent terms and definitions used in inventory of wetlands and to provide standard measurements for mapping these ...

  5. Portal:Wetlands/Selected article - Wikipedia

    en.wikipedia.org/wiki/Portal:Wetlands/Selected...

    Palustrine wetlands include any inland wetland which lacks flowing water, contains ocean-derived salts in concentrations of less than 0.5 parts per thousand, and is non-tidal. The word palustrine comes from the Latin word palus or marsh. Wetlands within this category include inland marshes and swamps as well as bogs, fens, tundra and floodplains.

  6. Wetland conservation - Wikipedia

    en.wikipedia.org/wiki/Wetland_conservation

    Wetland conservation is aimed at protecting and preserving areas of land including marshes, swamps, bogs, and fens that are covered by water seasonally or permanently due to a variety of threats from both natural and anthropogenic hazards. Some examples of these hazards include habitat loss, pollution, and invasive species.

  7. Wastewater quality indicators - Wikipedia

    en.wikipedia.org/wiki/Wastewater_quality_indicators

    Wastewater quality indicators are laboratory test methodologies to assess suitability of wastewater for disposal, treatment or reuse. The main parameters in sewage that are measured to assess the sewage strength or quality as well as treatment options include: solids, indicators of organic matter, nitrogen, phosphorus, indicators of fecal ...

  8. Secchi disk - Wikipedia

    en.wikipedia.org/wiki/Secchi_disk

    Different kinds of Secchi disks. A marine style on the left and the freshwater version on the right. The Secchi depth is reached when the reflectance equals the intensity of light backscattered from the water. 1.7 divided into this depth in metres yields an attenuation coefficient (also called an extinction coefficient), for the available light averaged over the Secchi disk depth.

  9. Portal:Wetlands - Wikipedia

    en.wikipedia.org/wiki/Portal:Wetlands

    A wetland is a land area that is saturated with water, either permanently or seasonally, such that it takes on the characteristics of a distinct ecosystem. The primary factor that distinguishes wetlands from other land forms or water bodies is the characteristic vegetation of aquatic plants , adapted to the unique hydric soil .

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