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  2. Multilevel groundwater monitoring systems - Wikipedia

    en.wikipedia.org/wiki/Multilevel_groundwater...

    The system can be used to monitor a few zones in boreholes as small as 2-inches, to boreholes up to 20 inches in diameter where numerous depth intervals can be monitored (most installations are in the 4- to 10-inch diameter borehole range) with maximum depth to date of 1,400 feet. Depth-to-water measurements can be made inside the sampling ...

  3. Current meter - Wikipedia

    en.wikipedia.org/wiki/Current_meter

    Under the influence of water currents (and wind if the top buoy is above the sea surface) the shape of the mooring line can be determined and by this the actual depth of the instruments. [ 8 ] [ 9 ] If the currents are strong (above 0.1 m/s ) and the mooring lines are long (more than 1 km ), the instrument position may vary up to 50 m .

  4. Water metering - Wikipedia

    en.wikipedia.org/wiki/Water_metering

    A typical residential water meter. Water metering is the practice of measuring water use. Water meters measure the volume of water used by residential and commercial building units that are supplied with water by a public water supply system. They are also used to determine flow through a particular portion of the system.

  5. Acoustic Doppler current profiler - Wikipedia

    en.wikipedia.org/wiki/Acoustic_Doppler_Current...

    An acoustic doppler current profiler (ADCP) is a hydroacoustic current meter similar to a sonar, used to measure water current velocities over a depth range using the Doppler effect of sound waves scattered back from particles within the water column.

  6. Parshall flume - Wikipedia

    en.wikipedia.org/wiki/Parshall_flume

    Using the Parshall flume flow equations and Tables 1-3, determine the flow type (free flow or submerged flow) and discharge for a 36-inch flume with an upstream depth, Ha of 1.5 ft and a downstream depth, H b of 1.4 ft.

  7. Gelisol - Wikipedia

    en.wikipedia.org/wiki/Gelisol

    The word "Gelisol" comes from the Latin gelare meaning "to freeze", a reference to the process of cryoturbation that occurs from the alternating thawing and freezing characteristic of Gelisols. In the World Reference Base for Soil Resources [1] (WRB), most Gelisols belong to the Cryosols. In soil taxonomy, Gelisols key out before the Histosols ...

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