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936105 Hydraulic conductivity and diffusion monitoring of the Keele Valley Landfill liner, Maple, Ontario
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Physico-chemical properties See also. 936011, 936033 936104 Dissolution and oxidation of mudstone under stress Chigira, M Can Geotech J V30, N1, Feb 1993, P60-70 Weathering of a soft mudstone was simulated in the laboratory in water at 15 deg C at pH 3-7 and dissolved oxygen at 416 mg/l and stresses up to 0.49MPa. Development of the oxidised zone and the underlying dissolved zone was studied for periods of up to 70 days. Changes in density, porosity, ultrasonic P wave velocity, coiour, and shear strength were monitored. Influence of stress level and acidity on weathering rate were examined.
936105 Hydraulic conductivity and diffusion monitoring of the Keele Valley Landfill liner, Maple, Ontario King, K S; Quigley, R M; Fernandez, F; Reades, D W; Bacopoulos, A Can Geotech J V30, N1, Feb 1993, P124-134 The base and sides of a former sand and gravel pit at Maple, now used for landfill, were lined with a minimum of 1.2m of recompacted excavated clayey silt till. In situ values of liner hydraulic conductivity based on lysimeter collection rates are close to those determined in an extensive series of laboratory tests. Electrical conductivity and effluent chemistry monitoring has been used to study advance of leachate-derived chemicals in the liner. Diffusion is found to be the dominant transport mechanism. Similar results were obtained for major ion concentrations during laboratory leachate compatibility tests. Actual performance of the liner is close to that expected on the basis of laboratory data.
936106 Computing thermal diffusivity from soil temperature measurements. Short note Hurley, S; Wiltshire, R J Comput Geosei V19, N3, March 1993, P475-477 The heat budget of surface soils or rocks is of interest to many scientists. The parameter thermal diffusivity, which describes the rate at which temperature varies with time, is important in heat budget studies. A procedure is presented for calculation of thermal diffusivity of a uniform or non-uniform medium, given a filtered set of temperature values for a particular time period.
936107 HEAT: a Fortran computer program for calculating 1-D conductive and advective heat transport in geological formations Caritat, P Comput Geosci V19, N5, May 1993, P673-689 A simple yet accurate numerical approximation of the 1D equation of heat transport by convection and advection is presented. The method is based on the iterative solution of a finite difference Crank-Nicholson algorithm, and is implemented within the computer program HEAT, which is listed. Effects of porewater flow on the temperature profile of permeable rock formations can be examined under steady or unsteady state boundary conditions and linear or nonlinear initial conditions. Several potential applications are described.
936108 Transient method of measuring the thermal properties of rocks Middleton, M F Geophysics V58, /73, March 1993, P357-365 A new rapid method to determine thermal conductivity and thermal diffusivity of rocks is presented. A constant heat flux is applied to the top surface of a small rock block which is insulated on all other surfaces. Temperature is measured on the bottom surface. Sensitivity analysis of accuracy obtained is given. Thermal conductivity values from this test are consistent with those from the steady-state divided-bar apparatus. Results are presented for a suite of rocks from western Australian sedimentary basins.
936109 Thermomechanieal effects on adsorbed water in clays around a heat source Ma, C; Huekel, T lnt J Num Anal Meth Geomech V17, N3, March 1993, P175196 The response of saturated clay to a constant heat ftux from a line source is examined numerically and results compared to analytical solutions. Mixture theory of two interacting thermoelastic components is used for the modelling. Degeneration of adsorbed water into bulk water is included. Near field and far field behaviour are determined using a finite difference method with a non-uniform mesh. Desorption of adsorbed water is greatest at the highest temperature and may lead to lower excess pore pressure, higher permeability increase, and increased water flow in the vicinity of the heat source.
936110 Uses and abuses of the Arehie equation, 1: The formation factor-porosity relationship Worthington, P F J Appi Geophys V30, N3, May 1993, P215-228 The first Archie equation relating electrical properties of a (shale-free) reservoir rock and its interconnected porosity has been fundamental to quantitative formation evaluation in the petroleum industry. Changes to this relation due to latent shale effects have been quantified in model studies. The relation is re-examined with particular reference to influence of clay mineral content on quantities 'a' and 'm'. Possible reasons for marked variations in these parameters reported in the literature are investigated.
936111 Magnetic susceptibility of the Mont-Louis Andorra ilmenitetype granite (Pyrenees): a new tool for the petrographic characterization and regional mapping of zoned granite plutons Gleizes, G; Nedelec, A; Bouchez, J L; Autran, A; Rochette, P J Geophys Res V98, NB3, March 1993, P4317-4331 Low field magnetic susceptibility measurements across the Mont-Louis Andorra pluton show consistent patterns of concentric zonation. Close correlation has been found between petrological characteristics of the rocks and magnetic susceptibility magnitude. It is concluded that the measurements accurately reflect the modal abundances of ferromagnesian minerals of the ilmenite series and represent a powerful tool for initial survey of petrological variation of granite plutons.
© 1993 Pergamon Press Ltd. Reproduction not permitted
Physico-chemical properties See also. 936011, 936033 936104 Dissolution and oxidation of mudstone under stress Chigira, M Can Geotech J V30, N1, Feb 1993, P60-70 Weathering of a soft mudstone was simulated in the laboratory in water at 15 deg C at pH 3-7 and dissolved oxygen at 416 mg/l and stresses up to 0.49MPa. Development of the oxidised zone and the underlying dissolved zone was studied for periods of up to 70 days. Changes in density, porosity, ultrasonic P wave velocity, coiour, and shear strength were monitored. Influence of stress level and acidity on weathering rate were examined.
936105 Hydraulic conductivity and diffusion monitoring of the Keele Valley Landfill liner, Maple, Ontario King, K S; Quigley, R M; Fernandez, F; Reades, D W; Bacopoulos, A Can Geotech J V30, N1, Feb 1993, P124-134 The base and sides of a former sand and gravel pit at Maple, now used for landfill, were lined with a minimum of 1.2m of recompacted excavated clayey silt till. In situ values of liner hydraulic conductivity based on lysimeter collection rates are close to those determined in an extensive series of laboratory tests. Electrical conductivity and effluent chemistry monitoring has been used to study advance of leachate-derived chemicals in the liner. Diffusion is found to be the dominant transport mechanism. Similar results were obtained for major ion concentrations during laboratory leachate compatibility tests. Actual performance of the liner is close to that expected on the basis of laboratory data.
936106 Computing thermal diffusivity from soil temperature measurements. Short note Hurley, S; Wiltshire, R J Comput Geosei V19, N3, March 1993, P475-477 The heat budget of surface soils or rocks is of interest to many scientists. The parameter thermal diffusivity, which describes the rate at which temperature varies with time, is important in heat budget studies. A procedure is presented for calculation of thermal diffusivity of a uniform or non-uniform medium, given a filtered set of temperature values for a particular time period.
936107 HEAT: a Fortran computer program for calculating 1-D conductive and advective heat transport in geological formations Caritat, P Comput Geosci V19, N5, May 1993, P673-689 A simple yet accurate numerical approximation of the 1D equation of heat transport by convection and advection is presented. The method is based on the iterative solution of a finite difference Crank-Nicholson algorithm, and is implemented within the computer program HEAT, which is listed. Effects of porewater flow on the temperature profile of permeable rock formations can be examined under steady or unsteady state boundary conditions and linear or nonlinear initial conditions. Several potential applications are described.
936108 Transient method of measuring the thermal properties of rocks Middleton, M F Geophysics V58, /73, March 1993, P357-365 A new rapid method to determine thermal conductivity and thermal diffusivity of rocks is presented. A constant heat flux is applied to the top surface of a small rock block which is insulated on all other surfaces. Temperature is measured on the bottom surface. Sensitivity analysis of accuracy obtained is given. Thermal conductivity values from this test are consistent with those from the steady-state divided-bar apparatus. Results are presented for a suite of rocks from western Australian sedimentary basins.
936109 Thermomechanieal effects on adsorbed water in clays around a heat source Ma, C; Huekel, T lnt J Num Anal Meth Geomech V17, N3, March 1993, P175196 The response of saturated clay to a constant heat ftux from a line source is examined numerically and results compared to analytical solutions. Mixture theory of two interacting thermoelastic components is used for the modelling. Degeneration of adsorbed water into bulk water is included. Near field and far field behaviour are determined using a finite difference method with a non-uniform mesh. Desorption of adsorbed water is greatest at the highest temperature and may lead to lower excess pore pressure, higher permeability increase, and increased water flow in the vicinity of the heat source.
936110 Uses and abuses of the Arehie equation, 1: The formation factor-porosity relationship Worthington, P F J Appi Geophys V30, N3, May 1993, P215-228 The first Archie equation relating electrical properties of a (shale-free) reservoir rock and its interconnected porosity has been fundamental to quantitative formation evaluation in the petroleum industry. Changes to this relation due to latent shale effects have been quantified in model studies. The relation is re-examined with particular reference to influence of clay mineral content on quantities 'a' and 'm'. Possible reasons for marked variations in these parameters reported in the literature are investigated.
936111 Magnetic susceptibility of the Mont-Louis Andorra ilmenitetype granite (Pyrenees): a new tool for the petrographic characterization and regional mapping of zoned granite plutons Gleizes, G; Nedelec, A; Bouchez, J L; Autran, A; Rochette, P J Geophys Res V98, NB3, March 1993, P4317-4331 Low field magnetic susceptibility measurements across the Mont-Louis Andorra pluton show consistent patterns of concentric zonation. Close correlation has been found between petrological characteristics of the rocks and magnetic susceptibility magnitude. It is concluded that the measurements accurately reflect the modal abundances of ferromagnesian minerals of the ilmenite series and represent a powerful tool for initial survey of petrological variation of granite plutons.
© 1993 Pergamon Press Ltd. Reproduction not permitted