Hydrogeophysical Properties of Parts of the British Trias*

Abstract

Laboratory studies of Bunter Sandstone specimens from Northwest Lancashire, Shropshire, West Cumberland, and the Vale of Clwyd have indicated that the parameters effective porosity, intergranular permeability, compressional wave velocity, formation resistivity factor, and effective matrix resistivity have significantly different distributions in each of these four regions. Regression analyses have shown that bivariate and trivariate expressions for the prediction of the two hydrological parameters from petrophysical data vary from region to region. It is concluded that, in quantitative geophysical investigations of these formations, each area must be investigated independently. For all four aquifers, and for both horizontally and vertically oriented specimens, effective porosity can be most reliably and readily estimated through a bivariate relationship involving formation resistivity factor. On the other hand, the best estimate of intergranular permeability from geophysical data is obtained through a trivariate expression involving both formation resistivity factor and effective matrix resistivity. The use of hydrogeophysical relationships to estimate hydrological parameters in situ is illustrated by reference to field examples.

Geotechnical Parameters from Seismic Measurements: Two Field Examples from Egypt and Saudi Arabia

“…In most instances, such determinations were required for only the first 100-200 m of the subsurface (Dobecki and Romig, 1985). Other applications included dam site investigations (Henriet et al, 1983;Dutta, 1984;Kim et al, 2010), groundwater resource exploration (Frohlich, 1974;van Overmeeren, 1975van Overmeeren, , 1980van Overmeeren, , 1981Vandenberghe, 1976;Worthington, 1976Worthington, , 1977Carmichael and Henry, 1977), industrial plant foundation design (Dinis da Gama and Bernardo, 2002), fracture density and uniformity (e.g., Bless and Ahrens, 1977;Sjogren et al, 1979;Hamdi and Smith, 1981), dynamic processes monitoring, which includes groundwater, petroleum, mining, and geothermal provinces either by repeat, active survey methods or by continuous, passive survey monitoring (Dusseault and Nyland, 1982;Bartel, 1982;Holzhausen et al, 1985;Arai and Tokimatsu, 2004;Goertz et al, 2012), clay mapping (Bazin and Pfaffhuber, 2013;Adamczyk et al, 2013;Shan et al, 2014), void detection (Hanafy, 2010;Nolan et al, 2011), and certification (safety) of existing structures such as dams (Bogoslovsky and Ogilvy, 1973a;Davenport and Hadley, 1984;Kim et al, 2010), mines (Fajk, 1983;Hanafy et al, 2009;Hanafy and Schuster, 2011), and concrete shafts (Hearne et al, 1979).…”

Delineation of Groundwater Potential Using GIS, Hydrogeological, Geophysical and Analytical Hierarchy Process (AHP) Technique in Olorunda-Abaa, Ibadan, Southwest Nigeria

“…These parameters are regarded as powerful interpretation aids, which can be used to define aquifer geometry. Worthington (1976), demonstrated that through variations in one or other of the Dar Zarrouk parameters, the target areas for initial groundwater development can often be identified. The Coefficient of Anisotropy ( ) has been found to be related to groundwater yield (Olorunfemi et al, 1991, Ojo et al, 2015.…”

“…Hence, this area can be classified as medium to very high groundwater potential zones in the study area. The total traverse unit resistance depicts aquifer productivity since higher borehole/well yield is obtainable in areas with higher saturated aquifer thickness and where resistivity values are moderately low in a typical Basement Complex area (Worthington, 1976).…”

“…3 and 4). The total longitudinal unit conductance is a geoelectric parameter that can be used to define target areas for groundwater potential (Worthington, 1976). High values usually indicate relatively thick aquifer subsurface layer succession and should be accorded the highest priority in terms of groundwater potential evaluation (Austin and Gabriel, 2015).…”

Geotechnical and groundwater geophysics

“…In this low period, the industry subsisted on occasional, large construction projects such as investigations for the 1976 Montreal Olympic site as described in Dobecki (1975), dam site investigations (Viksne, 1975;Henriet et ai., 1983;Dutta, 1984), and ever-present groundwater resource exploration (Frohlich, 1974;van Overrneeren, 1975van Overrneeren, , 1980van Overrneeren, , 1981Vandenberghe, 1982;Worthington, 1976Worthington, , 1977Carrnichael and Henry, 1977). Beginning in the mid-1970s and continuing to the present, we observe a shift in the dominant type of problems being addressed by geotechnical and groundwater geophysicists.…”