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Permeability of rock masses at great depth
211A assessed. They are based on monitoring the downward propagation into the unit of the seasonal cycle of water table fluctuation, and observation of flow in the vicinity of a cavity excavated in the unit. Results are consistent with conventional laboratory and slug tests. Characterisation of a glacial till site is described.
904113 Unidimensional solute transport incorporating equilibrium and rate-limited isotherms with first-order loss. 3. Approximate simulations of the front propagating after a step input Lassey. K R Water Resour Res V25, Nil, Not, 1989, P2357-2366 Sorptive processes accompanying one-dimensional solute flow in a porous medium can be modelled in terms of rate limiting isotherms. Rate limitation and dispersion together degrade the initially sharp solute front from the step input. If either process is dominant, good approximations of solute front are available if the minor process is neglected, using local equilibrium assumption (LEA) for dominant dispersion or nondispersive assumption (NDA) for dominant sorption. The double Laplace-like assumption (DLA) is developed and proposed for the case when neither of these extreme assumptions is valid. 904114 Field-scale transport of interacting solutes through the unsaturated zone. !. Analysis of the spatial variability of the transport properties Russo, D Water Resour Res 1/25, NI2, Dec 1989, P2475-2485 Transport of interacting solutes in a spatially variable soil is analysed.considering the effect of the interaction between the soil hydraulic properties and the soil solution ionic concentration and composition on the simultaneous transfer of water and solutes. Effect of the soil solution ionic concentration and composition on the spatial variability of the soil couplinginteraction properties is examined using the measured spatial distribution data of pertinent soil properties of the approach of Russo (1988). 904115 Field scale transport of interacting solutes through the unsaturated zone. 2. Analysis of the spatial variability of the field response Russo, D Water Resour Res V25, NI2, Dec 1989, P2487-2495 The effect of soil solute concentration and composition on spatial variability of soil properties pertinent to transport of mixed salts in an unsaturated soil has been examined in part I of this work. Impact of soil solution-soil matrix interaction on spatial variability of the field response to a given set of initial conditions imposed on the entire field is now evaluated. Simultaneous transport of water and soil-interactive solute in a spatially variable soil is simulated on a large field scale. 904116 Determination of parameters controlling seepage characteristics of unsaturated decomposed granite soil and their applications to numerical analysis Nishida. K; Sasaki, S Proc International Conference on Engineering Problems of Regional Soils, Beijing, !1-15 August 1988 P653-658. Publ Beijing: International Academic Publishers. 1989 Relations between fundamental properties describing the degree of weathering (specific gravity, apparent specific gravity and a grain size parameter) and seepage properties of residual granitic soils were examined. Saturated coefficient of permeability has a close relation to these selected parameters, and can
be used to calculate the unsaturated hydraulic conductivity using lrmays equation. Results are used in numerical analysis of infiltration into a layered system.
904117 Permeability of a tropical sandy soil Nogueira, J B; Vilar, O M; Das Neves, M Proc International Conference on Engineering Problems of Regional Soils, Beijing, 11-15 August 1988 P665-667. Publ Beijing: International Academic Publishers, 1989
Saturated permeability of a collapsible sandy soil (Cenozoic sediment) from Sao Paulo state, Brazil, has been studied in the laboratory using constant head tests. Permeability decreases with flow time until a steady value is reached. No particle washout occurs, but small particles are relocated in the lattice, obstructing voids in the soil. Permeability measurements should only be made after long water flow times for such soils.
9O4118 Permeability of rock masses at great depth Oda, M; Saitoo, T; Kamemura, K Proc International Symposium on Rock at Great Depth, Pau, 28-31 August 1989 VI, P449-455. Publ Rotterdam: A A Balkema. 1989 Jointed rock masses are treated as homogeneous, anisotropic porous media. The corresponding permeability tensor is formulated in terms of a symmetric second rank tensor depending on geometry of related joints and rock pressure at any depth. Two case studies are presented, Stripa Mine in Sweden and an oil storage cavern in Japan, where joints are extensively mapped and large scale permeability tests have been carried out. Mean permeabilities at both sites agreed well with calculated values. 904119 Experimental study for groundwater flow in an actual jointed rock mass Kikuchi, K; Mito, Y; Okuno, T Proc International Symposium on Rock at Great Depth, Pau, 28-31 August 1989 VI, P457-464. Publ Rotterdam: A A Balkema. 1989 Tests at a quarry site of hard fine unweathered granite are described. Outcrops were surveyed. Three holes were drilled and Lugeon and constant head permeability tests carried out along their depth. Grout was injected in one hole and smooth blasting used to remove rock so the resulting grout flow lenses could be observed. Borehole test results were interpreted to provide a flow channel map, which was in good agreement with indications from grout injection. 904120 Effect of fracture network connectivity on pumping test results (In French) Billaux, D Proc International Symposium on Rock at Great Depth, Pau, 28-31 August 1989 V1, P473-480. Publ Rotterdam: A A Balkema, 1989 Numerical study of the effect of fracture connectivity on hydraulic behaviour is presented. The 3D fracture network is modelled as a series of discs. Transitory response of such a network to constant rate injection is calculated. The connectivity away from the injection point is characterised by the variations in the number of different paths that it is possible to mark as a function of distance along the flow channel. For the examples studied, this approach describes the basic hydraulic behaviour.
© 1990 Pergamon Press plc. Reproduction not permitted
904113 Unidimensional solute transport incorporating equilibrium and rate-limited isotherms with first-order loss. 3. Approximate simulations of the front propagating after a step input Lassey. K R Water Resour Res V25, Nil, Not, 1989, P2357-2366 Sorptive processes accompanying one-dimensional solute flow in a porous medium can be modelled in terms of rate limiting isotherms. Rate limitation and dispersion together degrade the initially sharp solute front from the step input. If either process is dominant, good approximations of solute front are available if the minor process is neglected, using local equilibrium assumption (LEA) for dominant dispersion or nondispersive assumption (NDA) for dominant sorption. The double Laplace-like assumption (DLA) is developed and proposed for the case when neither of these extreme assumptions is valid. 904114 Field-scale transport of interacting solutes through the unsaturated zone. !. Analysis of the spatial variability of the transport properties Russo, D Water Resour Res 1/25, NI2, Dec 1989, P2475-2485 Transport of interacting solutes in a spatially variable soil is analysed.considering the effect of the interaction between the soil hydraulic properties and the soil solution ionic concentration and composition on the simultaneous transfer of water and solutes. Effect of the soil solution ionic concentration and composition on the spatial variability of the soil couplinginteraction properties is examined using the measured spatial distribution data of pertinent soil properties of the approach of Russo (1988). 904115 Field scale transport of interacting solutes through the unsaturated zone. 2. Analysis of the spatial variability of the field response Russo, D Water Resour Res V25, NI2, Dec 1989, P2487-2495 The effect of soil solute concentration and composition on spatial variability of soil properties pertinent to transport of mixed salts in an unsaturated soil has been examined in part I of this work. Impact of soil solution-soil matrix interaction on spatial variability of the field response to a given set of initial conditions imposed on the entire field is now evaluated. Simultaneous transport of water and soil-interactive solute in a spatially variable soil is simulated on a large field scale. 904116 Determination of parameters controlling seepage characteristics of unsaturated decomposed granite soil and their applications to numerical analysis Nishida. K; Sasaki, S Proc International Conference on Engineering Problems of Regional Soils, Beijing, !1-15 August 1988 P653-658. Publ Beijing: International Academic Publishers. 1989 Relations between fundamental properties describing the degree of weathering (specific gravity, apparent specific gravity and a grain size parameter) and seepage properties of residual granitic soils were examined. Saturated coefficient of permeability has a close relation to these selected parameters, and can
be used to calculate the unsaturated hydraulic conductivity using lrmays equation. Results are used in numerical analysis of infiltration into a layered system.
904117 Permeability of a tropical sandy soil Nogueira, J B; Vilar, O M; Das Neves, M Proc International Conference on Engineering Problems of Regional Soils, Beijing, 11-15 August 1988 P665-667. Publ Beijing: International Academic Publishers, 1989
Saturated permeability of a collapsible sandy soil (Cenozoic sediment) from Sao Paulo state, Brazil, has been studied in the laboratory using constant head tests. Permeability decreases with flow time until a steady value is reached. No particle washout occurs, but small particles are relocated in the lattice, obstructing voids in the soil. Permeability measurements should only be made after long water flow times for such soils.
9O4118 Permeability of rock masses at great depth Oda, M; Saitoo, T; Kamemura, K Proc International Symposium on Rock at Great Depth, Pau, 28-31 August 1989 VI, P449-455. Publ Rotterdam: A A Balkema. 1989 Jointed rock masses are treated as homogeneous, anisotropic porous media. The corresponding permeability tensor is formulated in terms of a symmetric second rank tensor depending on geometry of related joints and rock pressure at any depth. Two case studies are presented, Stripa Mine in Sweden and an oil storage cavern in Japan, where joints are extensively mapped and large scale permeability tests have been carried out. Mean permeabilities at both sites agreed well with calculated values. 904119 Experimental study for groundwater flow in an actual jointed rock mass Kikuchi, K; Mito, Y; Okuno, T Proc International Symposium on Rock at Great Depth, Pau, 28-31 August 1989 VI, P457-464. Publ Rotterdam: A A Balkema. 1989 Tests at a quarry site of hard fine unweathered granite are described. Outcrops were surveyed. Three holes were drilled and Lugeon and constant head permeability tests carried out along their depth. Grout was injected in one hole and smooth blasting used to remove rock so the resulting grout flow lenses could be observed. Borehole test results were interpreted to provide a flow channel map, which was in good agreement with indications from grout injection. 904120 Effect of fracture network connectivity on pumping test results (In French) Billaux, D Proc International Symposium on Rock at Great Depth, Pau, 28-31 August 1989 V1, P473-480. Publ Rotterdam: A A Balkema, 1989 Numerical study of the effect of fracture connectivity on hydraulic behaviour is presented. The 3D fracture network is modelled as a series of discs. Transitory response of such a network to constant rate injection is calculated. The connectivity away from the injection point is characterised by the variations in the number of different paths that it is possible to mark as a function of distance along the flow channel. For the examples studied, this approach describes the basic hydraulic behaviour.
© 1990 Pergamon Press plc. Reproduction not permitted