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  2. Level sensor - Wikipedia

    en.wikipedia.org/wiki/Level_sensor

    A common application of economical infrared-based optical interface point level sensors is detecting the sludge/water interface in settling ponds. By using pulse modulation techniques and a high power infrared diode, one can eliminate interference from ambient light, operate the LED at a higher gain, and lessen the effects of build-up on the probe.

  3. Tide gauge - Wikipedia

    en.wikipedia.org/wiki/Tide_gauge

    A tide gauge The tide gauge in Kronstadt, Russia [1] A tide gauge is a device for measuring the change in sea level relative to a vertical datum. [2] [3] It is also known as a mareograph, [4] marigraph, [5] and sea-level recorder. [6] When applied to freshwater continental water bodies, the instrument may also be called a limnimeter. [7] [8]

  4. Rend Lake State Fish and Wildlife Area - Wikipedia

    en.wikipedia.org/wiki/Rend_Lake_State_Fish_and...

    Rend Lake State Fish and Wildlife Area is an Illinois state park on 38,900 acres (15,700 ha) in Franklin and Jefferson Counties, United States. References

  5. Water level (device) - Wikipedia

    en.wikipedia.org/wiki/Water_level_(device)

    A water level device showing both ends at the same height. A water level (Greek: Aλφαδολάστιχο or (υδροστάθμη) [Alfadolasticho]) is a siphon utilizing two or more parts of the liquid water surface to establish a local horizontal line or plane of reference.

  6. Stream gauge - Wikipedia

    en.wikipedia.org/wiki/Stream_gauge

    The first routine measurements of river flow in England began on the Thames and Lea in the 1880s, [2] and in Scotland on the River Garry in 1913. [3] The national gauging station network was established in its current form by the early 1970s and consists of approximately 1500 flow measurement stations supplemented by a variable number of temporary monitoring sites. [2]

  7. Water level - Wikipedia

    en.wikipedia.org/wiki/Water_level

    Water level, also known as gauge height or stage, is the elevation of the free surface of a sea, stream, lake or reservoir relative to a specified vertical datum. [1]

  8. Rend Lake - Wikipedia

    en.wikipedia.org/wiki/Rend_Lake

    Rend Lake is a 13-mile (20.9 km) long, 3-mile (4.8 km) wide reservoir located in Southern Illinois in Franklin and Jefferson Counties near the town of Benton.It contains 18,900 acres (76 km 2) of water, stores 185,000 acre-feet (228,000,000 m 3) of water, and supplies over 15 million gallons of water per day to 300,000 persons in over 60 communities.

  9. Full pond - Wikipedia

    en.wikipedia.org/wiki/Full_pond

    Full pond is an American phrase used to describe the water level of a lake, reservoir or other body of fresh water when the level is just below the spillway, or is otherwise at a maximum, sustainable and safe level. Technically, a body of water can have a water level higher than full pond when the inflow of water into the body greatly exceeds ...

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