Glossary U

The Environmental Glossary. Letter U +++ Popular Articles: 'Utility-interactive', 'Ultraviolet radiation', 'Udder'

Deutsch: U.S. Geological Survey / Español: Servicio Geológico de los Estados Unidos / Português: Serviço Geológico dos Estados Unidos / Français: Service Géologique des États-Unis / Italiano: Servizio Geologico degli Stati Uniti

The U.S. Geological Survey (USGS) is a scientific agency of the United States government. It is dedicated to the study of the natural resources and the natural hazards that threaten the country. In the environmental context, the USGS plays a critical role in researching and providing data on various aspects of the Earth's surface, natural resources, and ecosystems. It conducts comprehensive studies on water, biological, energy, and mineral resources, and assesses the health and stability of our environments and ecosystems. The agency's work includes monitoring changes in the landscape, studying the impact of climate change, and providing essential data for the management and conservation of natural resources.

Deutsch: Euter / Español: Ubre / Português: Glândula mamária / Français: Mamelle

An udder is a bag-like organ containing two or more mammary glands and teats common to quadrupeds, particularly to ruminant and/or ungulate mammals.

Deutsch: Ultraviolettstrahlung / Español: Radiación ultravioleta / Português: Radiação ultravioleta / Français: Ultraviolet / Italiano: Radiazione ultravioletta
Ultraviolet (UV) light is electromagnetic radiation with a wavelength from 400 nm to 10 nm, shorter than that of visible light but longer than X-rays.

German: Ultraviolett
Ultraviolet radiation (UV) is a portion of the electromagnetic spectrum with wavelengths shorter than visible light.

An unconfined aquifer is an Aquifer whose upper water surface (water table) is at atmospheric pressure, and thus is able to

An unimodal response is a response in which a species has a single peak abundance at an optimal value (or range) of an Environmental variable and its abundance

An Unit surcharge is a surcharge imposed for all water use above a threshold level for excess consumption established based on average Per capita or per-household consumption.

- universal transverse Mercatorprojection : An universal transverse Mercator (UTM) projection is the map projection used in many standard map series.

An Upper-bound Lifetime Cancer Risk is a plausible upper limit to the true Probability that an individual will contract cancer over a 70 year lifetime as a result of a given hazard (such as exposure to a toxic chemical).

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