Phreatic surface definition

Phreatic surface means the free-water surface of a zone of seepage; it is represented by the uppermost flow line, or seepage line, in a flow net.
Sample 1Sample 2Sample 3
Phreatic surface means a surface that represents the water level in an unconfined saturated zone.
Sample 1Sample 2
Phreatic surface means the upper surface of the water table within the mass of the dam. It is the elevation of the water surface if an open hole were dug into the dam.
Sample 1Sample 2

Examples of Phreatic surface in a sentence

  • Comment: "Phreatic surface" is synonymous with the term "water table" and "piezometric surface” is synonymous with the term "potentiometric surface." Hydrogeologic investigations generally use "water table" for a water level surface in an unconfined saturated unit and "potentiometric surface" for the pressure head surface associated with a confined saturated unit.

  • The Phreatic surface and peizometric levels monitoring is being carried out 4 times in a year pre-monsoon (May), Monsoon (August), Post monsoon (November) and winter (January) seasons in 25 existing wells and 6 peizometric wells in Srirampur Area.

  • The Phreatic surface and peizometric levels monitoring from 2017(Winter) to 2022 (Pre Monsoon) is enclosed as Annexure-III.

  • Phreatic surface can be delineated by measurement of free water surface across the width of the dam.

  • Phreatic surface location and associated seepage analyses will also be used in the technical review of the impoundment design.

  • Phreatic surface due to SEEP/W and experimental work is drawn as shown in Fig.6. It is clear that a good agreement between the two methods.

  • A factor of safety (FS) of 1.50 was calculated using the Bishop Simplified method for the dike’s downstream slope assuming that the Phreatic surface exited near the surface sloughs.

  • Phreatic surface was introduced within the slope as obtained in centrifuge tests and was followed by the generation of steady state seepage condition.

  • The Phreatic surface and peizometric levels monitoring from 2018(Winter) to 2022 (Winter) is enclosed as Annexure-IV.Compliance status of Ground water Clearance:Ground Water Clearance Lr. No: 3324/Hg.III(2) /2005, dtd.25.8.2005.GW Cleara- nce Condi- tion No. GW Clearance Condition.

  • Comment: "Phreatic surface" is synonymous with the term "water table" and "piezometric surface" is synonymous with the term "potentiometric surface." Hydrogeologic investigations generally use "water table" for a water level surface in an unconfined saturated unit and "potentiometric surface" for the pressure head surface associated with a confined saturated unit.


More Definitions of Phreatic surface

Phreatic surface means a free surface of water seeping at atmospheric pressure through soil or rock;
Sample 1

Related to Phreatic surface

  • Groundwater means all water, which is below the surface of the ground in the saturation zone and in direct contact with the ground or subsoil.

  • Subsurface tracer study means the release of a substance tagged with radioactive material for the purpose of tracing the movement or position of the tagged substance in the well-bore or adjacent formation.

  • Controlled dangerous substance means a drug, substance, or

  • Soil means all unconsolidated mineral and organic material of any origin.

  • Dangerous Substance means any radioactive emissions and any natural or artificial substance (whether in solid or liquid form or in the form of a gas or vapour and whether alone or in combination with any other substance) which, taking into account the concentrations and quantities present and the manner in which it is being used or handled, it is reasonably foreseeable will cause harm to man or any other living organism or damage to the Environment including any controlled, special, hazardous, toxic, radioactive or dangerous waste.

  • Geologically hazardous areas means areas that because of their susceptibility to erosion, sliding, earthquake, or other geological events, are not suited to the siting of commercial, residential, or industrial development consistent with public health or safety concerns.

  • Subsurface Borings and Testing means borings, probings and subsurface explorations, laboratory tests and inspections of samples, materials and equipment; appropriate professional interpretations of all the foregoing.

  • Contaminated site means a site where there is a confirmed presence, caused by man, of hazardous substances of such a level that they pose a significant risk to human health or the environment taking into account current and approved future use of the land;

  • Dangerous Substances means a substance or article described in regulation 3 of the Dangerous Substances Regulations;

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

  • Contaminated soil means soil that meets all of the following criteria:

  • Septic tank means a watertight, accessible, covered receptacle designed and constructed to receive sewage from a building sewer, settle solids from the liquid, digest organic matter, store digested solids through a period of retention, and allow the clarified liquids to discharge to other treatment units for final disposal.

  • Radioactive waste means radioactive waste as defined in Article 3(7) of Council Directive 2011/70/Euratom8;

  • Cosmetic Surgery means any Surgery, service, Drug or supply designed to improve the appearance of an individual by alteration of a physical characteristic which is within the broad range of normal but which may be considered unpleasing or unsightly, except when necessitated by an Injury.

  • Universal waste transporter means a person engaged in the off-site transportation of universal waste by air, rail, highway, or water.

  • Contaminate means the addition of sediment, any other pollutant or waste, or any illicit or prohibited discharge.

  • Counterfeit substance means a controlled substance which, or the container or labeling of which, without authorization, bears the trademark, trade name, or other identifying mark, imprint, number or device, or any likeness thereof, of a manufacturer, distributor, or dispenser other than the person who in fact manufactured, distributed, or dispensed the substance.

  • Extremely Hazardous Substance has the meaning set forth in Section 302 of the Emergency Planning and Community Right-to-Know Act of 1986, as amended.

  • Wildlife habitat means a surface water of the state used by plants and animals not considered as pathogens, vectors for pathogens or intermediate hosts for pathogens for humans or domesticated livestock and plants.

  • Contamination means the presence of, or Release on, under, from or to the environment of any Hazardous Substance, except the routine storage and use of Hazardous Substances from time to time in the ordinary course of business, in compliance with Environmental Laws and with good commercial practice.

  • Low-level radioactive waste or “waste” means radioactive material that consists of or contains class A, B, or C radioactive waste as defined by 10 C.F.R. 61.55, as in effect on January 26, 1983, but does not include waste or material that is any of the following:

  • Radioactive substance means a substance that emits ionizing

  • High global warming potential hydrofluorocarbons means any hydrofluorocarbons in a particular end use for which EPA’s Significant New Alternatives Policy (SNAP) program has identified other acceptable alternatives that have lower global warming potential. The SNAP list of alternatives is found at 40 CFR Part 82 subpart G with supplemental tables of alternatives available at (http://www.epa.gov/snap/).

  • Pervious surface means an area that releases as runoff a small portion of the precipitation that falls on it. Lawns, gardens, parks, forests or other similar vegetated areas are examples of surfaces that typically are pervious.

  • 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.

  • Environmental Contamination means the introduction or presence of Hazardous Materials at such levels, quantities or location, or of such form or character, as to constitute a violation of federal, state or local laws or regulations, and present a material risk under federal, state or local laws and regulations that the Premises will not be available or usable for the purposes contemplated by this Agreement.