perched water-table

См. также в других словарях:

• perched water table — noun : the upper surface of a body of perched groundwater …   Useful english dictionary

• perched water table —    Unconfined ground water separated from an underlying body of ground water by unsaturated soil or rock. It may be either temporary or permanent …   Lexicon of Cave and Karst Terminology

• Water table — The water table is the level at which the ground water pressure is equal to atmospheric pressure. It may be conveniently visualized as the surface of the ground water in a given vicinity. It usually coincides with the phreatic surface , but can… …   Wikipedia

• ground water, perched —    Unconfined ground water separated from an underlying body of ground water by an unsaturated zone. Its water table is a perched water table. Perched ground water is held up by a perching bed whose permeability is so low that water percolating… …   Lexicon of Cave and Karst Terminology

• spring, perched karst —    The emergence of underground water some where above the basement of a calcareous massif caused by the interbedding of an impermeable or intermittent perched water table by restricting the vertical movement of water, which instead issues from… …   Lexicon of Cave and Karst Terminology

• Deep water coral — Table coral, which can live in deep water (in this picture, it is in shallow, warm water) The habitat of deep water corals, also known as cold water corals, extends to deeper, darker parts of the oceans than tropical corals, ranging from near the …   Wikipedia

• Sand-based athletic fields — are sporting grounds constructed on sand, which have certain advantages over those built on native soils. Highly maintained areas of turf, such as those on an athletic field or on golf greens and tees, can be grown in native soil or sand based… …   Wikipedia

• Mima mounds — Coordinates: 46°53′55″N 123°03′02″W / 46.8985602°N 123.0504799°W / 46.8985602; 123.0504799 Mima mounds ( …   Wikipedia

• Gley soil — in soil science is a type of hydric soil which exhibits a greenish blue grey soil color due to wetland conditions. On exposure to the air, gley colors are transformed to a mottled pattern of reddish, yellow or orange patches. During gley soil… …   Wikipedia

• Landslide — This article is about the geological phenomenon. For other uses, see Landslide (disambiguation). Rockslide redirects here. For the comic book character, see Rockslide (comics). Computer simulation of a slump landslide in San Mateo County,… …   Wikipedia

• Middleton-by-Wirksworth — Coordinates: 53°05′00″N 1°35′00″W / 53.08333°N 1.583333°W / 53.08333; 1.583333 …   Wikipedia