National Water Research Institute of Malaysia

Water knowledge

WATERPEDIA

Technical water terms, definitions and acronyms.

TechnicalEN

Alkaline

sometimes water or soils contain an amount of alkali (strongly basic) substances sufficient to raise the  pH  value above 7.0 and be harmful to the growth of crops.
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TechnicalEN

alluvium

deposits of clay, silt, sand, gravel, or other particulate material that has been deposited by a stream or other body of running water in a streambed, on a flood plain, on a delta, or at the base of a mountain.
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TechnicalEN

appropriation doctrine

the system for allocating water to private individuals used in most Western states. The doctrine of Prior Appropriation was in common use throughout the arid west as early settlers and miners began to develop the land. The prior...
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TechnicalEN

aqueduct

a pipe, conduit, or channel designed to transport water from a remote source, usually by gravity.
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TechnicalEN

aquifer

a geologic formation(s) that is water bearing. A geological formation or structure that stores and/or transmits water, such as to wells and springs. Use of the term is usually restricted to those water-bearing formations capable of...
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TechnicalEN

aquifer (confined)

soil or rock below the land surface that is saturated with water. There are layers of impermeable material both above and below it and it is under pressure so that when the aquifer is penetrated by a well, the water will rise above the...
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