Glossary D

The Environmental Glossary. Letter D +++ Popular Articles: 'Deposition', 'Degradation', 'Diesel'

A demonstration field program is a collection of demonstration research projects to provide preliminary estimates of resource condition for one or more indicators applied to one or more resource classes over a standard Federal region.

A demonstration project is a field research project designed to provide preliminary estimates of a resource condition for a single indicator over a standard Federal region for one or more resource classes.

A Denitrification is the biological reduction of nitrate to nitrogen gas by denitrifying Bacteria in soil.

- Dense Non-Aqueous Phase Liquid (DNAPL) : A Dense Non-Aqueous Phase Liquid (DNAPL) is Non-aqueous phase liquids such as chlorinated hydrocarbon solvents or petroleum fractions with a specific gravity greater than 1.0 that sink through the water column until they reach a confining layer.

A Density is a measure of how heavy a specific volume of a solid, liquid, or gas is in comparison to water.

A Density-Dependence is regulation of the size of a population by mechanisms that are themselves controlled by the size of that population (e.g.

A Depletion is water supplies that are being used up, gradually in most cases, without being replaced.

A Depletion Curve is In hydraulics, a graphical representation of water depletion from storage-stream channels, surface soil, and groundwater.

Deutsch: Ablagerung / Español: Deposición / Português: Deposição / Français: Déposition / Italiano: Deposizione /

A deposition is the processes by which chemical constituents move from the atmosphere to the earth's surface.

A Depression is a low area in a field where surface Drainage away from the area does not occur.

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