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Determination of hydrogeological parameters using sinusoidal pressure tests: A theoretical appraisal
Author(s) -
Black J. H.,
Kipp K. L.
Publication year - 1981
Publication title -
water resources research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.863
H-Index - 217
eISSN - 1944-7973
pISSN - 0043-1397
DOI - 10.1029/wr017i003p00686
Subject(s) - borehole , hydrogeology , aquifer , line source , point source , geology , excitation , amplitude , signal (programming language) , hydraulic conductivity , phase (matter) , line (geometry) , point (geometry) , mechanics , geotechnical engineering , soil science , acoustics , physics , groundwater , mathematics , geometry , computer science , optics , quantum mechanics , soil water , programming language
A method for determining the hydrogeological parameters of formations of interest based on a sinusoidal pressure fluctuation in an excitation borehole is proposed. Equations are derived which describe the dependence of pressures and phase lags outside the excitation borehole on distance, signal frequency, specific storage, hydraulic conductivity, and flow rates. These cover two distinct configurations: that of a point source deep within a water‐saturated elastic formation and that of a line source totally penetrating a confined aquifer. The ranges of application of these two arrangements are appraised using existing data on hydraulic diffusivities to derive likely excitation and response pressures for various flow rates and signal frequencies. The two configurations require the accurate measurement of phase shifts in the case of the point source and of amplitudes in the line source case, and it is concluded that the ranges of applications are useful but limited.