catchment area

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catchment area


drainage basin,

area drained by a stream or other body of water. The limits of a given catchment area are the heights of land—often called drainage divides, or watersheds—separating it from neighboring drainage systems. The amount of water reaching the river, reservoir, or lake from its catchment area depends on the size of the area, the amount of precipitation, and the loss through evaporation (determined by temperature, winds, and other factors and varying with the season) and through absorption by the earth or by vegetation; absorption is greater when the soil or rock is permeable than when it is impermeable. A permeable layer over an impermeable layer may act as a natural reservoir, supplying the river or lake in very dry seasons. The catchment area is one of the primary considerations in the planning of a reservoir for water-supply purposes.
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Catchment area

Surface, typically on a roof, where rainwater is caught and directed into a rainwater harvesting system.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved

catchment area

[′kach·mənt ‚er·ē·ə]
The rural-urban outskirts of a particular city.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

catch basin

A reservoir, esp. for catching and retaining surface drainage over a large area, in which sediment may settle.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.

catchment area

the area of land bounded by watersheds draining into a river, basin, or reservoir
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
References in periodicals archive ?
"The proposed boundary between the two catchment areas is clear, has the support of most stakeholders and is likely to provide for safe walking routes to school."
"The review is focused on the catchment areas for Kellands School, Strathburn School and Uryside School.
'Perlis, Kedah and Penang are highly dependent on Ulu Muda as a regional water catchment area,' he said.
A report, to be discussed by Garioch area committee, says: "Rising pupil numbers at both Kellands and Strathburn School, along with the opening of Uryside School has prompted the need for a review of the catchment areas.
A report to the cabinet says: "The council is considering a change to the admission arrangements and oversubscription criteria for secondary schools whereby those living in a school catchment area will be a high priority for admission to a school in the event of oversubscription."
He hailed the mining company for embarking on infrastructural development in the areas of schools, clinics, and potable drinking water, but said Chirano Kinross was found wanting in the area of employment, scoring 40-50% for employing youth in its catchment areas, a development, he noted, which needs improvement .
Kenya Meteorological Department acting director Peter Ambenje last month said the catchment areas had started receiving rains.
Areas such as Murang'a, Kilifi, Wajir and Naivasha, just to mention a few, are experiencing water and food shortage, which can only be attributed to destruction of water catchment areas, all gratitude to the loggers for their sinister acts.
On questioning the importance of afforestation on the catchment areas, Sadhguru affirmed that maintaining 100% forest cover in all the catchment areas of all rivers and streams is of paramount importance.
The precipitation rate in Iran's six main catchment areas has declined by 4 percent in the first 10 months of the current water year.