water level


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water level

the water line of a boat or ship

Water Level

 

in rivers and lakes, the position of the free water surface referred to some horizontal surface of constant elevation. The surface of reference may be either relative or absolute, that is, either some plane of arbitrary elevation (the plane is the datum level) or the surface corresponding to the mean water level of the ocean at the shores of the continents.

Variations of the water level in a river occur primarily because of changes in flow rate, warping of the channel, or the backwater effect. In an inland body of water, variations of the water level may result from a change in the ratio of the elements in the water balance, surges, or seiches. Annual water level variations depend on climatic conditions and range from a few centimeters to 2–3 m in lakes and up to 5–12 m in large rivers.

Water level observations are made at water level measuring stations.

water level

[′wȯd·ər ‚lev·əl]
(building construction)

water level

A simple device for establishing two points at the same elevation; consists of a water-filled flexible hose (from which air has been excluded) with a piece of glass tubing at each end; the water level is observed through the glass tubing.
References in periodicals archive ?
According to David, it was possible that NWRB would decide this moth to again raise the MWSS allocation in October if the water level at Angat reached 190 masl or higher.
In the report, the global Water Level Alarms market has been analyzed through a segmental perspective.
In the aftermath of recent rains Sutlej showed higher water level and current flow recorded at Head Ganda Singh point was 4,755 cusecs,it was learnt.
Wapda spokesman Irfan Khattak said the water level before rain was 1,920 feet AMSL.
'We are expecting that from August 20 onwards the water level in Tarbela will reach its maximum conservation level of 1,550 cusecs feet and the dam for the very first time in this season will be full,' he said.
The Idukki hydroelectric project has been a feather in the cap for Kerala's hydro-power generation sector, and a high water level normally means bright prospects and robust revenues for the Kerala State Electricity Board.
The Shimen Reservoir water level has been gradually depleted reaching 232.21 meters on May 14.
As many as, 1,242 is the maximum conservation of water level in the reservoir of the largest dam in the country, located in Mirpur district of AJK.
Water level at the dam stood at 40 per cent two weeks ago.
Water level at the Toktogul Reservoir has decreased to 14.5 billion m3, the Electric Stations JSC told Tazabek on Tuesday.
By Mail Today Bureau in New Delhi WATER level of the Yamuna, which swelled through the night breaching the danger mark around 4am, has started receding but is still above the warning mark, officials said on Sunday.
Testing is also being carried out to verify whether PU-PERA BWS Sulawesi I's quickly recording and sharing changes in the river's water level through this system enables effective condition assessment for river management.