Hydraulic head definition

Hydraulic head means the flow of sewage is operating against resistance and the flow depth is above the crown of the sewer pipe.
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Hydraulic head means the energy possessed by the water mass at a given point, related to the height above the datum plane that water resides in a well drilled to that point. In a groundwater system, the hydraulic head is composed of elevation head and pressure head.
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Hydraulic head means the elevation to which water rises in a piezometer or a well.
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Examples of Hydraulic head in a sentence

  • Hydraulic head dh shall be based on published drain manufacturer’s design data or other approved data as a function of flow rate through the cumulative effect of secondary drains for an impounded roof area.

  • Other head losses can be determined directly from figure Hydraulic head loss within apoint system can be estimated from figure As stated in above, flow into a well can be impeded by the lack of “wetted screen length,” in addition to hy- draulic head losses in the filter or through the screens chemical or mechanical clogging of the aquiferand filter.

  • Hydraulic head in the Cow Creek was 39.4 ft higher than the “upper reef” interval of the LGR, which is stratigraphically higher than the Cow Creek.

  • Hydraulic head is calculated by subtracting the depth to water from the elevation of the top of the well.

  • Hydraulic head is related to the pore pressure, P (Pa), byPwh = r g (4)where rw (kg m23) is the density of water and g¼( 9.81 m s22) is the acceleration due to gravity.¼ ¼The head at x 0 and flow at x Ls as functions of time were obtained by numerically inverting the Laplace transform solution given in Appendix 1.

  • Innovation developers in different types of products (von Hippel 1988).

  • Hydraulic head, hydraulic conductivity, and storativity estimates will be compared to quantify any changes in hydraulic properties caused by barrier emplacement.

  • Hydraulic head is lower in a discharging well than it would be if that well were shut in and allowed to recover to steady state.

  • Hydraulic head (h) on the aquifer varies not only as do pressure and elevation, but also as water density.

  • Hydraulic head mea-surements indicate the heads have dropped by 10−50 cm a−1in response to lignite mining across the border in Germany or for other reasons.


More Definitions of Hydraulic head

Hydraulic head means a specific measurement of liquid pressure above a geodetic datum that is usually measured as a liquid surface elevation, expressed in units of length, at the entrance or bottom of a piezometer.
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Hydraulic head means the energy contained at a point in the groundwater system. Hydraulic head is measured as the elevation to which water rises in a piezometer.
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Hydraulic head means the pressure in a closed water or sewer pipe system where the pressure is over and above the atmospheric pressure.
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Hydraulic head means the height of water above any plane of reference; “hydraulic head” also means the energy, either kinetic or potential, possessed by each unit weight of a liquid, expressed as the vertical height through which a unit weight would have to fall to release the average energy possessed.
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Related to Hydraulic head

  • Flue means a passage for conveying the products of combustion from a gas appliance to the external air.

  • Hydraulic fracturing means the fracturing of underground rock formations, including shale and non-shale formations, by manmade fluid-driven techniques for the purpose of stimulating oil, natural gas, or other subsurface hydrocarbon production.

  • Hydraulic lift tank means a tank holding hydraulic fluid for a closed-loop mechanical system that uses compressed air or hydraulic fluid to operate lifts, elevators, and other similar devices.

  • Standard Methods for the Examination of Water and Wastewater means the most recent edition of Standard Methods for the Examination of Water and Wastewater published jointly by the American Public Health Association, the American Waterworks Association and the Water Environment Federation;

  • Underground source of drinking water means an aquifer or its portion:

  • Process Wastewater means any water which, during manufacturing or processing, comes into direct contact with or results from the production or use of any raw material, intermediate product, finished product, by-product, or waste product.

  • Flat coating means a coating that is not defined under any other definition in this section and that registers gloss less than 15 on an 85-degree meter or less than 5 on a 60-degree meter.

  • Antenna coating means a coating labeled and formulated exclusively for application to equipment and associated structural appurtenances that are used to receive or transmit electromagnetic signals.

  • Toileting means getting to and from the toilet, getting on and off the toilet, and performing associated personal hygiene.

  • Potable means water suitable for drinking by the public.

  • Membrane filtration means a pressure or vacuum driven separation process in which particulate matter larger than 1 micrometer is rejected by an engineered barrier, primarily through a size-exclusion mechanism, and which has a measurable removal efficiency of a target organism that can be verified through the application of a direct integrity test. This definition includes the common membrane technologies of microfiltration, ultrafiltration, nanofiltration, and reverse osmosis.

  • Automotive windshield washer fluid means any liquid designed for use in a motor vehicle windshield washer system either as an antifreeze or for the purpose of cleaning, washing, or wetting the windshield. Automotive windshield washer fluid does not include fluids placed by the manufacturer in a new vehicle.

  • drain means (subject to Section 219(2) of the 1991 Act) a drain used for the drainage of one building or any buildings or yards appurtenant to buildings within the same curtilage;

  • Filtration means a process for removing particulate matter from water by passage through porous media.

  • Pyrolysis means the thermal degradation of a substance in the absence of any oxidising agent, which does not form part of the substance itself, to produce char and gas and/or liquid; and

  • Irrigation means application of water to land areas to supply the water needs of

  • Exfiltration means any unauthorized release of data from within an information system. This includes copying the data through covert network channels or the copying of data to unauthorized media.

  • Sewage means a combination of the water-carried wastes from residences, business buildings, institutions, and industrial establishments, together with such ground, surface, and storm waters as may be present.

  • Sewage sludge weight means the weight of sewage sludge, in dry U.S. tons, including admixtures such as liming materials or bulking agents. Monitoring frequencies for sewage sludge parameters are based on the reported sludge weight generated in a calendar year (use the most recent calendar year data when the NPDES permit is up for renewal).

  • Oxides of nitrogen means the sum of the volume mixing ratio (ppbv) of nitrogen monoxide (nitric oxide) and nitrogen dioxide expressed in units of mass concentration of nitrogen dioxide (µg/m3);

  • Cabinet x-ray system means an x-ray system with the x-ray tube installed in an enclosure independent of existing architectural structures except the floor on which it may be placed. The cabinet x-ray system is intended to contain at least that portion of a material being irradiated, provide radiation attenuation, and exclude personnel from its interior during generation of radiation. Included are all x-ray systems designed primarily for the inspection of carry-on baggage at airline, railroad, and bus terminals, and in similar facilities. An x-ray tube used within a shielded part of a building, or x-ray equipment that may temporarily or occasionally incorporate portable shielding, is not considered a cabinet x-ray system.

  • Riprap means small, broken stones or boulders placed compactly or irregularly on dykes or similar embankments for protection of earth surfaces against wave action or current;

  • Electrical protection barrier means the part providing protection against any direct contact to the high voltage live parts.

  • Sewage Treatment Plant means any arrangement of devices and structures used for treating sewage.

  • Biological safety cabinet means a containment unit suitable for the preparation of low to moderate risk agents where there is a need for protection of the product, personnel, and environment, according to National Sanitation Foundation (NSF) Standard 49.

  • Fluoroscopy means a technique for generating x-ray images and presenting them simultaneously and continuously as visible images. This term has the same meaning as the term "radioscopy" in the standards of the International Electrotechnical Commission.