phreatic


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Related to phreatic: phreatic water, Phreatic zone

phreatic

[frē′ad·ik]
(geology)
Of a volcanic explosion of material such as steam or mud, not being incandescent.
References in periodicals archive ?
However, the Philippine Institute of Volcanology and Seismology (Phivolcs) has maintained advisory to the local government units and the public that entry to the 4-kilometer radius Permanent Danger Zone (PDZ) is strictly prohibited due to the possibility of sudden and hazardous steam-driven or phreatic eruptions.
0 inch thickness recommended in Pitt's study is very capable of the external hydrostatic load even with the phreatic surface at the top of the ground.
Looking in turn at fundamentals of slope stability and methods of stability analysis, he covers mechanics of slides, shear strength phreatic surfaces, remedial measures for correcting slides, simplified methods for plane surface failure surfaces, stability charts and other solutions, method of slices, methods for three-dimensional analysis, and reliability.
Carbonate cement can precipitate in both vadose and phreatic hydrologic environments, which are distinguished by specific mechanisms and cement characteristics that are unique to or more prevalent in particular environments (Vogt & Corte 1996; Hall et al.
He strives to be readable and yet avoid the vice of oversimplification; thus along with, for instance, chapters about the hydrologic cycle, aquifers, and contemporary groundwater supply issues, there are also chapters on vadose water and phreatic water and applied hydrogeology.
Dupuit [6] based his assumptions on the observation that, in most groundwater flows, the slope of the phreatic surface is very small.
10) Typical Taal Volcano eruptions are described to be phreatic and phreato-magmatic type and to originate alternately from the Main Crater and the centers on the flanks.
Disaster officials reminded residents to stay away from the 6-kilometer radius permanent danger zone, warning that phreatic explosions and ash puffs may occur without precursors.
Indeed, the fumes coming from the depths of Hierapoli's phreatic groundwater produced hallucinations.
The sprinklers were functioning usually in the same place and so the level of the phreatic waters rose to the surface.