Advection definition

Advection means the horizontal movement of an air pollutant by the wind.
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Advection means the mass transport of a solute as it flows along with the ground water. Advection is the dominant transport process that drives solute migration in the ground water. The amount of solute that is being transported is a function of its concentration in the ground water and the quantity of ground water flow. The velocity at which a solute is transported through the ground water may not be the same as the velocity of the ground water due to other fate and transport processes. The velocity of water in the saturated zone is governed by three factors, each of which is characteristic of the specific ground water flow system: hydraulic gradient, hydraulic conductivity, and effective porosity. Advection is used to calculate dispersion and down-gradient plume migration. While not destroying or immobilizing contaminants, advection can affect the rate of reactions that contribute to natural attenuation.
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Examples of Advection in a sentence

  • Graphical Processing Unit (GPU), Advection- Dispersion (AD), Particle Tracking (PT), 3D, Sediment Transport (ST) and Water Quality (WQ) are available as optional modules- refer to the Optional Modules Section for information on these advanced features.

  • Advection is generally expected to occur in the vicinity of buildings, because differences in temperature between the building interior and the subsurface environment or the operation of combustion units or fans within the building can create driving forces for soil gas entry (See Section 2.3).

  • Advection occurs in the vadose zone when there is bulk movement of soil gas induced by spatial differences in soil gas pressure.

  • Advection may be hindered where extensive surface barriers, such as asphalt, concrete, or frozen soil are present.

  • Advection of soil gas may also occur: • near the ground surface due to fluctuations in barometric (atmospheric) pressure, which can either release soil gas into the atmosphere (Clements and Wilkening 1974) orintroduce ambient air into the subsurface environment (the latter process may be important in oxygenating surface soil horizons);56 • wherever methane generation from anaerobic degradation is sufficiently high (e.g., near some landfills, some locations with degrading fuels).

  • S.N., M.W. Farthing, and C.T. Miller (1997) High-resolution ENO Schemes for the Simulation of Advection and Dispersion Problems, EOS Transactions, American Geophysical Union, Vol.

  • Advection Dispersion (AD) Module Provides access to the TUFLOW AD Module, for the simulation of conservative constituents.

  • Advection fog forms as warm, moist air from the sea or land cools as it passes over a colder surface.

  • The Effect of Alongcoast Advection on Pacific Northwest Shelf and Slope Water Properties in Relation to Upwelling Variability.

  • Advection in polar and sub-polar environments: Impacts on high latitude marine ecosystems.

Related to Advection

  • COVID-19 symptoms means fever of 100.4 degrees Fahrenheit or higher, chills, cough, shortness of breath or difficulty breathing, fatigue, muscle or body aches, headache, new loss of taste or smell, sore throat, congestion or runny nose, nausea or vomiting, or diarrhea, unless a licensed health care professional determines the person’s symptoms were caused by a known condition other than COVID-19.

  • Infection means the entry and development or multiplication of an infectious agent in the body of humans and animals that may constitute a public health risk;

  • Disinfection profile means a summary of Giardia lamblia inactivation through the treatment plant.

  • Third Party Material means software, software development tools, methodologies, ideas, methods, processes, concepts and techniques owned by, or licensed to a third party and used by the Service Provider in the performance of the Services;

  • Publicity Material means the promotional gifts, catalogues, pamphlets and all and any advertising and publicity material whatsoever which an Exhibitor wishes to display, distribute or use at the Exhibition.

  • Disinfection means a process which inactivates pathogenic organisms in water by chemical oxidants or equivalent agents.

  • Activity Material means any Material, other than Reporting Material, created or developed by the Grantee as a result of the Activity and includes any Existing Material that is incorporated in or supplied with the Activity Material.

  • Contractor Materials means Materials owned or developed prior to the provision of the Work, or developed by Contractor independently from the provision of the Work and without use of the Court Materials or Confidential Information.

  • Processes with Significant Environmental Aspects means the Equipment which, during regular operation or if not properly operated or maintained, may cause or are likely to cause an adverse effect.

  • Pathogen means an organism that is capable of producing an infection or disease in a susceptible host.

  • Areas susceptible to mass movement means those areas of influence, characterized as having an active or substantial possibility of mass movement, where the movement of earth material at, beneath, or adjacent to the landfill unit, because of natural or human-induced events, results in the downslope transport of soil and rock material by means of gravitational influence. Areas of mass movement include landslides, avalanches, debris slides and flows, soil fluction, block sliding, and rock falls.

  • Nonconformance as used in this clause means a condition of any hardware, software, material, or service/workmanship in which one or more characteristics do not conform to requirements.

  • Biological agent shall mean any pathogenic (disease producing) micro-organism(s) and/or biologically produced toxin(s) (including genetically modified organisms and chemically synthesized toxins) which cause illness and/or death in humans, animals or plants.

  • Antipsychotic medications means that class of drugs

  • Third Party Materials means any materials and information, including documents, data, know-how, ideas, methodologies, specifications, software, content, and technology, in any form or media, in which any Person other than the State or Contractor owns any Intellectual Property Right, but excluding Open-Source Components.

  • Adverse Environmental Condition means (i) the existence or the continuation of the existence, of an Environmental Contamination (including, without limitation, a sudden or non-sudden accidental or non-accidental Environmental Contamination), of, or exposure to, any substance, chemical, material, pollutant, Hazardous Substance, odor or audible noise or other release or emission in, into or onto the environment (including without limitation, the air, ground, water or any surface) at, in, by, from or related to any Equipment, (ii) the environmental aspect of the transportation, storage, treatment or disposal of materials in connection with the operation of any Equipment, or (iii) the violation, or alleged violation, of any Environmental Law, permits or licenses of, by or from any governmental authority, agency or court relating to environmental matters connected with any of the Equipment.

  • 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.

  • Collaborative drug therapy management means participation by an authorized pharmacist and a physician in the management of drug therapy pursuant to a written community practice protocol or a written hospital practice protocol.

  • Initial Environmental Examination or “IEE” means the initial environmental examination for the Project, including any update thereto, prepared and submitted by the Borrower and cleared by ADB;

  • Diagnosis means the definition of the nature of the Client's disorder. When formulating the Diagnosis of Client, CONTRACTOR shall use the diagnostic codes and axes as specified in the most current edition of the DSM published by the American Psychiatric Association. DSM diagnoses will be recorded on all IRIS documents, as appropriate.

  • Fluoroscopic imaging assembly means a subsystem in which X-ray photons produce a visual image. It includes the image receptor(s) such as the image intensifier and spot-film device, electrical interlocks, if any, and structural material providing linkage between the image receptor and diagnostic source assembly.

  • Prosthesis means an artificial substitute for a missing body part.

  • 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.

  • Biological Material means any material containing genetic information and capable of reproducing itself or being reproduced in a biological system;

  • Materials of Environmental Concern any gasoline or petroleum (including crude oil or any fraction thereof) or petroleum products or any hazardous or toxic substances, materials or wastes, defined or regulated as such in or under any Environmental Law, including asbestos, polychlorinated biphenyls and urea-formaldehyde insulation.

  • Material of Environmental Concern means and includes pollutants, contaminants, hazardous wastes, and toxic, radioactive, caustic or otherwise hazardous substances, including petroleum, its derivatives, by-products and other hydrocarbons, or any substance having any constituent elements displaying any of the foregoing characteristics.