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Section 11 Glossary of Terms and Acronyms

EAA Storage Reservoirs Revised Draft PIR and EIS February 2006

11-7

stage to acceptable levels. Second, to make available water for water supply

demand (e.g., ecological, agricultural, or urban).

Reservoir— Artificially impounded body of water.

Scoping— The process of defining the scope of a study, primarily with respect to

the issues, geographic area, and alternatives to be considered. The term is

typically used in association with environmental documents prepared under the

National Environmental Policy Act.

Seepage— Water that escapes control through levees, canals or other holding or

conveyance systems.

Slough— A depression associated with swamps and marshlands as part of a

bayou, inlet or backwater.

Spillway— Overflow structure of a dam.

Stream— Natural water course.

Subsidence— A local mass movement that principally involves the gradual

downward settling or sinking of the earth's surface with little or no horizontal

motion. It may be due to natural geologic processes or mass activity such as

removal of subsurface solids, liquids, or gases, ground water extraction, and

wetting of some types of moisture-deficient loose or porous deposits.

Threatened species— Legal status afforded to plant or animal species that are

likely to become endangered within the foreseeable future throughout all or a

significant portion of their range, as determined by the U.S. Fish and Wildlife

Service or the National Marine Fisheries Service.

Wetland— A zone periodically or continuously submerged or having high soil

moisture, which has aquatic and/or riparian vegetation components, and is

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