REFRACTION DETERMINATION OF WATER TABLE DEPTH AND ALLUVIUM THICKNESS

Geophysics ◽  
1968 ◽  
Vol 33 (3) ◽  
pp. 481-488 ◽  
Author(s):  
James Otto Duguid
Keyword(s):  
Ground Water ◽  
Water Table ◽  
Seismic Wave ◽  
Seismic Waves ◽  
Water Table Depth ◽  
Ground Water Table ◽  
Weathered Zone ◽  
Time Distance

During an investigation of alluvium using a shallow refraction seismograph, time‐distance curves obtained indicated two refraction interfaces. The shallower of the interfaces is the ground‐water table, whose depth was obtained with an accuracy of ±10 percent. The deeper interface is either the surface of the bedrock or the base of the weathered zone on the bedrock. If this lower interface is the surface of the bedrock, the velocity of seismic waves in the weathered material will be considerably lower than if the interface is the base of the weathered zone. Using this criteria makes it possible to determine whether the seismic wave is refracted from the surface of the bedrock or the base of the weathered zone.

Determination of Shallow Ground Water Table in the Bangkok Clay using Seismic Refraction

2020 ◽  
Author(s):  
K. Sangprasat ◽  
R. Onsibut ◽  
P. Barbier ◽  
F. Levitre ◽  
B. Amante ◽  
...  
Keyword(s):  
Ground Water ◽  
Water Table ◽  
Seismic Refraction ◽  
Ground Water Table

scholarly journals Premises for the construction of balance equations of water reserves in the saturation zone of forest soil

2009 ◽  
Vol 13b (1) ◽  
pp. 87-108 ◽  
Author(s):  
Józef Suliński ◽  
Krzysztof Owsiak
Keyword(s):  
Ground Water ◽  
Forest Soil ◽  
Soil Water ◽  
Water Table ◽  
Water Table Depth ◽  
Soil Profiles ◽  
Balance Equations ◽  
Lowland Forest ◽  
Ground Water Table ◽  
Saturation Zone

Premises for the construction of balance equations of water reserves in the saturation zone of forest soil Premises for the construction of balance equations of water reserves in the saturation zone of forest soil are presented in this paper. Changes of soil water reserves are dealt with as an effect of the atmosphere-tree stand-soil balance at the assumption of constant ground water flow and negligibly small losses for infiltration down the soil profile below saturation zone. These assumptions are met in permeable lowland forest soils, particularly in areas where the aquifer is situated on relatively shallow impermeable substratum. Then, for snow-free periods, it is possible to: 1) combine the increment of soil water reserves with precipitation above tree crowns and with plant and litter interception and 2) combine the losses of soil water reserves with plant transpiration and evaporation from the soil surface. The periods of increments and losses of soil water reserves are determined from limnigraph records of ground water table depth in piesometers. Examples are given in the paper of equations identified by long term data from 13 soil profiles localised in pine forests on Pleistocene flood-plain of the Dunajec River. The data included: ground water table depth, physical properties of grounds in soil profiles, and hydro-climatic conditions. The equations combine increments and losses of water reserves in the saturation zone with rainfall and deficits of air humidity measured on a mid-forest meadow.

Influence of Forest Cover on the State of the Ground Water Table

1953 ◽  
Vol 17 (1) ◽  
pp. 65-67 ◽  
Author(s):  
S. A. Wilde ◽  
E. C. Steinbrenner ◽  
R. S. Pierce ◽  
R. C. Dosen ◽  
D. T. Pronin
Keyword(s):  
Ground Water ◽  
Water Table ◽  
Forest Cover ◽  
The State ◽  
Ground Water Table
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