Pore pressure definition

Pore pressure means the pressure of a fluid held within spaces between particles (i.e. pore space) in a rock.
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Examples of Pore pressure in a sentence

  • Saha, University of Melbourne, Australia (I-376) Pore pressure measurement during cake filtration, E.

  • Pore pressure is the pressure exerted by fluids in the pore space of the formation being drilled.

  • Pore pressure data can be used in an effective stress analysis, which can indicate a state of impending failure not apparent from a total stress (Q) analysis.

  • Pore pressure changes give rise to poroelastic stresses whose magnitudes depend on the rock stiffness (elastic moduli) and the Biot effective stress coefficient, defined as α= 1-K/Ks. Besides, cooling effects driven by long-term cold fluid injection (particularly during geologic carbon storage and geothermal energy exploitation) result in thermoelastic stresses, proportional to the rock stiffness and linear rock expansion coefficient, αT (De Simone et al., 2017).

  • Pore pressure will diffuse slowly downwards in function of soil diffusivity, and the deeper, the smaller the change in porepressure.

  • Pore pressure map in a small area around the injection point (1000 1000 m).

  • Pore pressure decrease also occurs after percolation until, eventually, the entire regolith or rock mass is saturated.

  • Pore pressure changes: Increasing the pore pressure on pre-stressed faults may eventual- ly cause these faults to rupture, releasing a (generally small) fraction of the tectonic stresses accumulated over centuries.

  • Pore pressure transducers were connected to the top and bottom platens to measure the pore pressure in the sample.

  • Pore pressure buildup occurs when the pavement is in a saturated condition due to moisture attack.

Related to Pore pressure

  • Vapor pressure as herein used means Vapor Pressure at 100° Fahrenheit as determined by ASTM Method D-323-90, "Standard Method of Test for Vapor Pressure of Petroleum Products (Reid Method)."

  • Pressure means relative pressure versus atmospheric pressure, unless otherwise stated.

  • Reid vapor pressure means the vapor pressure of crude oil or other volatile petroleum products at 100 degrees Fahrenheit as determined by the latest edition of ASTM D6377 (RVPE): Standard Test Method for Determination of Vapor Pressure of Crude Oil.

  • True vapor pressure means the equilibrium partial pressure exerted by a petroleum liquid as determined in accordance with methods described in American Petroleum Institute (API) Bulletin 2517, Evaporation Loss from External Floating Roof Tanks, 1980. The API procedure may not be applicable to some high viscosity or high pour crudes. Available estimates of true vapor pressure may be used in special cases such as these.

  • Pressure vessel means a vessel that may be used for containing, storing, distributing, transferring, distilling, processing or otherwise handling any gas, vapour or liquid under pressure greater than the atmospheric pressure and includes any pipeline fitting or other equipment attached thereto or used in connection therewith; and

  • Operating pressure means the pressure at which the parts of an irrigation system are designed by the manufacturer to operate.

  • Working pressure means the settled pressure of a compressed gas at a reference temperature of 15 °C in a full pressure receptacle;

  • Positive pressure respirator means a respirator in which the pressure inside the respiratory inlet covering exceeds the ambient air pressure outside the respirator.

  • Low water pressure means water pressure below the regulatory reference level which is the minimum pressure when demand on the system is not abnormal.

  • design pressure means the maximum pressure that a pressure vessel or plant is designed to withstand safety when operating normally;

  • Electrostatic spray means a method of applying a spray coating in which opposite electric charges are applied to the substrate and the coating. The coating is attracted to the substrate by the electrostatic potential between them.

  • Noise means two times the root mean square of ten standard deviations, each calculated from the zero responses measured at a constant frequency which is a multiple of 1,0 Hz during a period of 30 seconds.

  • Finished water means the water that is introduced into the distribution system of a public water system and is intended for distribution and consumption without further treatment, except as treatment necessary to maintain water quality in the distribution system (e.g., booster disinfection, addition of corrosion control chemicals).

  • 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).

  • Slug means any discharge of water, sewage, or industrial waste which in concentration of any given constituent or in quantity of flow exceeds for any period of duration longer than fifteen (15) minutes more than five (5) times the average twenty-four (24) hour concentration or flows during normal operation.

  • Tank means an enclosed space which is formed by the permanent structure of a ship and which is designed for the carriage of liquid in bulk.

  • Blend means seed consisting of more than one variety of a kind, each in excess of five percent by weight of the whole.

  • Recycled water or “reclaimed water” means treated or recycled waste water of a quality suitable for non-potable uses such as landscape irrigation and water features. This water is not intended for human consumption.

  • Invasive plant species means species of plants not historically found in California that spread outside cultivated areas and can damage environmental or economic resources. Invasive species may be regulated by county agricultural agencies as noxious species. Lists of invasive plants are maintained at the California Invasive Plant Inventory and USDA invasive and noxious weeds database.

  • Blendstock means and includes any petroleum product component of motor fuel, such as naphtha, reformate, or toluene; or any oxygenate that can be blended for use in a motor fuel.

  • Biomass means the biodegradable fraction of products, waste and residues from biological origin from agriculture (including vegetal and animal substances), forestry and related industries including fisheries and aquaculture, as well as the biodegradable fraction of industrial and municipal waste;

  • Vessels shall have the meaning set forth in the recitals.

  • Plant canopy means the square footage dedicated to live plant production and does not include areas such as office space or areas used for the storage of fertilizers, pesticides, or other products.

  • Slash means all debris created on the Work area by the precommercial thinning operation.

  • Slug loading means any pollutant, including oxygen demanding pollutants, released in a discharge at a flow rate and/or pollutant concentration as to cause interference in the POTW.

  • Solids means the nonvolatile portion of the coating that after drying makes up the dry film.