Coefficient of permeability definition

Coefficient of permeability and "Hydraulic Conductivity" shall mean the rate of laminar flow of water through a unit cross-sectional area of a porous medium under a unit hydraulic gradient at a standard temperature. The units of "Coefficient of Permeability" and "Hydraulic Conductivity" shall be expressed in centimeters per second.

Examples of Coefficient of permeability in a sentence

  • PERMEABILITY: Coefficient of permeability shall be greater than 0.6 cm/sec ASTM D 2434.

  • Coefficient of permeability measured in pavement subbases is denoted as hydraulic conductivity, which has the same units as velocity, and is expressed in units of length per time (cm/sec or feet per day).

  • Standard Proctor compaction test.7. Coefficient of permeability of soils.8. Unconfined compressive strength test.9. Direct shear test on granular soil sample.10.

  • This should be a minimum of 1.5 ft.• k: Coefficient of permeability for the sand filter bed=3.5 (ft/day).• t: Time required to drain the WQV through the sand filter bed (day).

  • Coefficient of permeability is used to assess drainage characteristics of soil, to predict rate of settlement founded on soil bed.

  • Where drainage drywells are proposed as stormwater infiltration infrastructure, the required drainage drywell wall surface areas shall be determined using Darcy's Empirical Law as follows: Where: Q = Design flow in m3/s; A = Cross-sectional area of soil through which flow takes place in m2; K = Coefficient of permeability of receiving soils in m/s; i = Hydraulic gradient within proximity to the drywell.

  • Indirect measurements can be performed in situ and these methods use the volume mass properties of soil and soil water characteristic curve.Coefficient of permeability K is formulated in Darcy’s law as Q=K.i.A (2.25) A= Gross cross sectional area K= Coefficient of permeability i= Hydraulic gradientQ= Flow in unit time.

  • Coefficient of permeability of various sub soil and rock strata based on in-situ permeability tests.

  • Coefficient of permeability of an underground stratum is 0.001 m/s.

  • Coefficient of permeability recovery using a 7.5 % aqueous solution of calcium chloride was 93 %, as for concentration of CaCI2 of 10 % – coefficient was 96 %, as for 15 % CaCI2 – 91 %.

Related to Coefficient of permeability

  • Turbidity means the cloudy condition of water due to the presence of extremely fine particulate materials in suspension that interfere with the passage of light.

  • Permeability of a space means the ratio of the volume within that space which is assumed to be occupied by water to the total volume of that space.

  • Irrigation efficiency (IE) means the measurement of the amount of water beneficially used divided by the amount of water applied. Irrigation efficiency is derived from measurements and estimates of irrigation system characteristics and management practices. The irrigation efficiency for purposes of this ordinance are 0.75 for overhead spray devices and 0.81 for drip systems.

  • Coefficient means a number that represents the quantified relationship of each variable to the assessed value of a property when derived through a mass appraisal process

  • Coefficient of variation or “C” means the ratio of the standard deviation to the mean value of a population of observations. It is estimated using the following equation:

  • Runoff coefficient means the fraction of total rainfall that will appear at the conveyance as runoff.

  • Structural pest control means a use requiring a license under Chapter 14 (commencing with Section 8500), Division 3, of the Business and Professions Code.

  • Fertilization means the fusion of a human spermatozoon with a human ovum.

  • Wildlife violation means any cited violation of a statute, law, regulation, ordinance, or administrative rule developed and enacted for the management of wildlife resources and the uses thereof.

  • Crawling bug insecticide means any insecticide product that is designed for use against ants, cockroaches, or other household crawling arthropods, including, but not limited to, mites, silverfish or spiders. “Crawling Bug Insecticide” does not include products designed to be used exclusively on humans or animals, or any house dust mite product. For the purposes of this definition only:

  • Repeatability means the range of values within which the repeat results of cigarette test trials from a single laboratory will fall 95 percent of the time.

  • 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.

  • New Jersey Stormwater Best Management Practices (BMP) Manual or “BMP Manual” means the manual maintained by the Department providing, in part, design specifications, removal rates, calculation methods, and soil testing procedures approved by the Department as being capable of contributing to the achievement of the stormwater management standards specified in this chapter. The BMP Manual is periodically amended by the Department as necessary to provide design specifications on additional best management practices and new information on already included practices reflecting the best available current information regarding the particular practice and the Department’s determination as to the ability of that best management practice to contribute to compliance with the standards contained in this chapter. Alternative stormwater management measures, removal rates, or calculation methods may be utilized, subject to any limitations specified in this chapter, provided the design engineer demonstrates to the municipality, in accordance with Section IV.F. of this ordinance and N.J.A.C. 7:8-5.2(g), that the proposed measure and its design will contribute to achievement of the design and performance standards established by this chapter.

  • traceability means the ability to trace and follow a food, feed, food-producing animal or substance intended to be, or expected to be incorporated into a food or feed, through all stages of production, processing and distribution;

  • Flying bug insecticide means any insecticide product that is designed for use against flying insects or other flying arthropods, including but not limited to flies, mosquitoes, moths, or gnats. Flying bug insecticide does not include wasp and hornet insecticide, products that are designed to be used exclusively on humans or animals, or any moth-proofing product. For the purposes of this definition only, moth-proofing product means a product whose label, packaging, or accompanying literature indicates that the product is designed to protect fabrics from damage by moths, but does not indicate that the product is suitable for use against flying insects or other flying arthropods.

  • Endangered species means wildlife designated by the

  • Stability means structural stability.

  • Air pollution control equipment means a mechanism, device, or contrivance used to control or prevent air pollution, that is not, aside from air pollution control laws and administrative regulations, vital to production of the normal product of the source or to its normal operation.

  • Imminent danger to the health and safety of the public means the existence of any condition or practice, or any violation of a permit or other requirement of this chapter in a surface coal mining and reclamation operation, which condition, practice, or violation could reasonably be expected to cause substantial physical harm to persons outside the permit area before such condition, practice, or violation can be abated. A reasonable expectation of death or serious injury before abatement exists if a rational person, subjected to the same conditions or practices giving rise to the peril, would not expose the person's self to the danger during the time necessary for abatement.

  • 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.

  • Native vegetation means plant species that are indigenous to the region.

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

  • 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;

  • Accessibility means the ability for persons served to enter, approach, communicate with, or make use of the services of an agency, including but not limited to the need for bilingual staff, minority-specific programming, staffing patterns that reflect community demographics and adequacy of hours of operation.

  • Safety Management System has the meaning given to it in the ISM Code.

  • Environmental, Health, and Safety Requirements means all federal, state, local and foreign statutes, regulations, ordinances and other provisions having the force or effect of law, all judicial and administrative orders and determinations, all contractual obligations and all common law concerning public health and safety, worker health and safety, and pollution or protection of the environment, including without limitation all those relating to the presence, use, production, generation, handling, transportation, treatment, storage, disposal, distribution, labeling, testing, processing, discharge, release, threatened release, control, or cleanup of any hazardous materials, substances or wastes, chemical substances or mixtures, pesticides, pollutants, contaminants, toxic chemicals, petroleum products or byproducts, asbestos, polychlorinated biphenyls, noise or radiation, each as amended and as now or hereafter in effect.