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radius of influence — The radial distance from the center of a well bore to the point where there is no lowering of the water table or potentiometric surface (the edge of its cone of depression) [6] … Lexicon of Cave and Karst Terminology
radius — /ray dee euhs/, n., pl. radii / dee uy /, radiuses. 1. a straight line extending from the center of a circle or sphere to the circumference or surface: The radius of a circle is half the diameter. 2. the length of such a line. 3. any radial or… … Universalium
radius — /ˈreɪdiəs / (say raydeeuhs) noun (plural radii /ˈreɪdiaɪ/ (say raydeeuy) or radiuses) 1. a straight line extending from the centre of a circle or sphere to the circumference or surface. 2. the length of such a line. 3. any radial or radiating… …
radius — ra•di•us [[t]ˈreɪ di əs[/t]] n. pl. di•i [[t] diˌaɪ[/t]] di•us•es 1) math. a straight line extending from the center of a circle or sphere to the circumference or surface: The radius of a circle is half the diameter 2) math. the length of such a… … From formal English to slang
Atomic radius — Diagram of a helium atom, showing the electron probability density as shades of gray. The atomic radius of a chemical element is a measure of the size of its atoms, usually the mean or typical distance from the nucleus to the boundary of the… … Wikipedia
Sphere of influence (astronomy) — The sphere of influence is a region around a supermassive black hole in which the gravitational potential of the black hole dominates the gravitational potential of the host bulge. There are two definitions in common use for the radius of the… … Wikipedia
Solar radius — In astronomy, the solar radius is a unit of length used to express the size of stars. It is equal to the current radius of the Sun. Its value is::1,R {odot} = 6.960 imes 10^8,hbox{m} = 0.004652,hbox{AU} (Astronomical unit).The solar radius is… … Wikipedia
Sphere of Influence — Als Sphere of Influence (kurz SOI; engl. für Einflusssphäre) bezeichnet man eine u.a. in der Astrodynamik und Raumfahrt gebräuchliche Größe, die angibt, in welchem Bereich die Gravitation eines Planeten Auswirkungen auf andere Himmelskörper hat… … Deutsch Wikipedia
Sphere of influence (astrodynamics) — A sphere of influence (SOI) in astrodynamics and astronomy is the spherical region around a celestial body where the primary gravitational influence on an orbiting object is that body. This is usually used to describe the areas in our solar… … Wikipedia
Well drainage — means drainage of agricultural lands by wells. Agricultural land is drained by pumped wells (vertical drainage) to improve the soils by controlling water table levels and soil salinity. Contents 1 Introduction 2 Design 3 Flow to wells 4 … Wikipedia
Aquifer test — An aquifer test (or a pumping test) is conducted to evaluate an aquifer by stimulating the aquifer through constant pumping, and observing the aquifer s response (drawdown) in observation wells. Aquifer testing is a common tool that… … Wikipedia
