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  2. Water table - Wikipedia

    en.wikipedia.org/wiki/Water_table

    The slope of the water table is known as the “hydraulic gradient”, which depends on the rate at which water is added to and removed from the aquifer and the permeability of the material. The water table does not always mimic the topography due to variations in the underlying geological structure (e.g., folded, faulted, fractured bedrock).

  3. Hydraulic head - Wikipedia

    en.wikipedia.org/wiki/Hydraulic_head

    Measuring hydraulic head in an artesian aquifer, where the water level is above the ground surface. Hydraulic head or piezometric head is a specific measurement of liquid pressure above a vertical datum. [1] [2] It is usually measured as a liquid surface elevation, expressed in units of length, at the entrance (or bottom) of a piezometer.

  4. Drawdown (hydrology) - Wikipedia

    en.wikipedia.org/wiki/Drawdown_(hydrology)

    Static level is the level of water in the well when no water is being removed from the well by pumping. [8] Water table is the upper level of the zone of saturation, an underground surface in which the soil or rock is permanently saturated with water. [9] Well yield is the volume of water per unit time that is produced by the well from pumping. [8]

  5. Pore water pressure - Wikipedia

    en.wikipedia.org/wiki/Pore_water_pressure

    The standard method for measuring pore water pressure below the water table employs a piezometer, which measures the height to which a column of the liquid rises against gravity; i.e., the static pressure (or piezometric head) of groundwater at a specific depth. [6]

  6. Pressure measurement - Wikipedia

    en.wikipedia.org/wiki/Pressure_measurement

    In an unconfined aquifer, the water level in the piezometer would not be exactly coincident with the water table, especially when the vertical component of flow velocity is significant. In a confined aquifer under artesian conditions, the water level in the piezometer indicates the pressure in the aquifer, but not necessarily the water table. [34]

  7. Potentiometric surface - Wikipedia

    en.wikipedia.org/wiki/Potentiometric_surface

    For groundwater "potentiometric surface" is a synonym of "piezometric surface" which is an imaginary surface that defines the level to which water in a confined aquifer would rise were it completely pierced with wells. [1] If the potentiometric surface lies above the ground surface, a flowing artesian well results.

  8. Today's Wordle Hint, Answer for #1252 on Friday, November 22 ...

    www.aol.com/todays-wordle-hint-answer-1252...

    Rescuers dig for survivors of Vanuatu earthquake with no water and unclear death toll. Sports. Sports. Associated Press. Giannis, Bucks use 3-point barrage to beat Thunder 97-81 for NBA Cup title.

  9. Vadose zone - Wikipedia

    en.wikipedia.org/wiki/Vadose_zone

    Cross section showing the water table varying with surface topography as well as a perched water table The vadose zone , also termed the unsaturated zone , is the part of Earth between the land surface and the top of the phreatic zone , the position at which the groundwater (the water in the soil's pores) is at atmospheric pressure ("vadose" is ...