atmospheric transmissivity

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Beer-Lambert law — In optics, the Beer–Lambert law, also known as Beer s law or the Lambert–Beer law or the Beer–Lambert–Bouguer law (in fact, most of the permutations of these three names appear somewhere in literature) is an empirical relationship that relates… … Wikipedia
Aquifer — Typical aquifer cross section An aquifer is a wet underground layer of water bearing permeable rock or unconsolidated materials (gravel, sand, or silt) from which groundwater can be usefully extracted using a water well. The study of water flow… … Wikipedia
groundwater — [groundwôt΄ər] n. water found underground in porous rock strata and soils, as in a spring: also written ground water * * * ground water also ground·wa·ter (groundʹwô tər, wŏt ər) n. Water beneath the earth s surface, often between saturated soil… … Universalium

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