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Hydrofacies distribution and correlation in the Miami Valley aquifer system
249A
PROPERTIES:GENERAL and screened beneath will result in an overestimate of transmissivity. (from Authors)
PROPERTIES
SOILS
OF
ROCKS
AND
General 966065 Advective and dispersive mixing in stratified formations G. E. Urroz, Yang Ma & M. W. Kemblowski, Transport in Porous Media, 18(3), 1995, pp 231-243. The mixing process in fluid flow is presented as the bending and stretching of material lines or filaments. A mixing exponent, which quantifies their specific rate of stretching, is defined and analyzed for the case of groundwater flow though stratified formations characterized by a Ganssian autocovariance function. The analysis is performed for purely advective mixing as well as for adveetive-dispersive mixing. The mixing exponent was found to be proportional to the variance of hydraulic conductivity and inversely proportional to the correlation scale of hydraulic conductivity and to the porelevel dispersion coefficient. (Authors)
966066 Experimental investigation of solute transport in large, homogeneous and heterogeneous, saturated soil columns K. Huang, N. Toride & M. T. Van Genuchtco, Transport in Porous Media, 18(3), 1995, pp 283-302. Laboratory tracer experiments were conducted to investigate solute transport in 12.5-m long, horizontally placed soil columns during steady saturated water flow. Two columns were used: a uniformly packed homogeneous sandy column and a heterogeneous column containing layered, mixed, and lenticular formations of various shapes and sizes. The dispersivity for transport in both columns increased with travel distance or traveltime, thus exhibiting scale-dependency. The heterogeneous soil column also showed the effects of preferential flow, i.e., some locations in the column showed earlier solute breakthrough than several locations closer to the inlet boundary. (from Authors)
966067 Hydrofacies distribution and correlation in the Miami Valley aquifer system g. W. Ritzi Jr, D. F. Dominic, N. R. Brown, K. W. Kausch, P. J. McAlenney & M. J. Basial, Water Resources Research, 31(12), 1995, pp 3271-3281. Heterogeneity in glaciofhivial aquifers is typified by lowpermeability facies (e.g., till or lacustrine clay) juxtaposed with high-permeability facies (e.g., sand and gravel outwash). The Miami Valley aquifer system was examined at multiple sites for the spatial distribution and correlation of these two hydrofacies. Binary indicator geostatistics were used to quantitatively determine, at each site, the relative volume of each hydrofacies, their spatial distribution, the major principal direction of their spatial correlation, the minor principal direction, and the correlation range in these directions. The percent by volume of the system that is aquitard material decreases down the valley. Each site has an elevation zone with more aquitard material relative to other elevations at that site. The percent aquitard material in these zones decreases down the valley. The maximum principal direction of spatial correlation in the aquitard zones generally is subparallel to the trend of the bedrock valley. Among the sites investigated, there is a trend down the valley in the ratio of aquitard volume to aquifer volume, and the spatial correlation and distribution of aquitard material are similar within the aquitard zones. (from Authors)
RMMS 336
1
966O68 European roofing slates. Part 2: geological selected examples of slate deposits W. Wagner, R. Le Bail, M. P. Hacar-Rodriguez & S. Stanek, Zeitschriftfur Angewandte Geologie, 41(1), 1995, pp 21-26. A selection of slate deposits is discussed with respect to their geology and the mining geology. The emphasis is on the major deposits in northwest Spain (Ordovician). Deposits in northwest France (Ordovician), Czech Republic (mainly Carboniferous), Germany (Devonian and Carboniferous) and north Norway (Precambrian) are also described. The mining geology of roofing slate deposits is discussed on the basis of these deposits. (Authors) 966069 Mining/milling processes and tallings generation G. W. Poling, Marine Georesources & Geotechnology, 13(12), 1995, pp 19-31. Detailed knowledge of the mineralogy of an ore and the physical and chemical actions involved in mining and processing are all essential in predetermining the possible suitability of tailings for submarine discharge. This paper describes some of the characterizations of tailings materials that can indicate their possible suitability or nonsuitability for submarine discharge. (from Authors) 966070 Evaluation of geoteehuical and hydrogeological properties of wastes R. P. Beaven, in: Engineering geology of waste disposal, ed S.P. Bentley, (Geological Society of London; Engineering Geology Special Publication, 11), 1996, pp 57-65. The effect of landfiiling on leachate levels (through a reduction in refuse storativity) is illustrated using the results of leacbate-level monitoring at two sites. The effect of landfilling on refuse permeability is shown by results from leachate pumping tests. The physical and hydrogeological properties of refuse were investigated using a large-scale compression cell. The design and operation of the compression cell are described and preliminary results from initial testing presented. (from Author) 966071 Use of gravel washing silt in the domain of drinking water storage, geothermal storage and contaminant confinement G. De Los Cobos & A. Parriaux, Bulletin - International Association of Engineering Geology, 52, 1995, pp 53-58. Gravel washing silt from alluvium or crushed rock constitute an industrial waste whose utilisation, at the present time, is very limited and whose disposal is an environmental problem. The recovery of this by-product can be envisaged through the use of the intrinsic properties of this clayey silt: low hydraulic conductivity, homogeneity and isotropy. The basic idea would be to use this material in the construction of underground containment barriers for the management and protection of groundwater in three main areas: drinking water storage, geothermal storage and containment confinement. Measurements demonstrate promising potential for use as a water-tight confinement barrier. (from Authors) 966072 Sand sampling below the water table using the 200 mm diameter Laval sampler J.-M. Konrad, S. St-Laurent, F. Gilbert & S. Leroueil, Canadian Geotechnical Journal, 32(6), 1995, pp 1079-1086. This paper describes the different operations for sampling sand deposits. To preserve the fragile soil structure, the samples are frozen unidirectionally in open system conditions
PROPERTIES:GENERAL and screened beneath will result in an overestimate of transmissivity. (from Authors)
PROPERTIES
SOILS
OF
ROCKS
AND
General 966065 Advective and dispersive mixing in stratified formations G. E. Urroz, Yang Ma & M. W. Kemblowski, Transport in Porous Media, 18(3), 1995, pp 231-243. The mixing process in fluid flow is presented as the bending and stretching of material lines or filaments. A mixing exponent, which quantifies their specific rate of stretching, is defined and analyzed for the case of groundwater flow though stratified formations characterized by a Ganssian autocovariance function. The analysis is performed for purely advective mixing as well as for adveetive-dispersive mixing. The mixing exponent was found to be proportional to the variance of hydraulic conductivity and inversely proportional to the correlation scale of hydraulic conductivity and to the porelevel dispersion coefficient. (Authors)
966066 Experimental investigation of solute transport in large, homogeneous and heterogeneous, saturated soil columns K. Huang, N. Toride & M. T. Van Genuchtco, Transport in Porous Media, 18(3), 1995, pp 283-302. Laboratory tracer experiments were conducted to investigate solute transport in 12.5-m long, horizontally placed soil columns during steady saturated water flow. Two columns were used: a uniformly packed homogeneous sandy column and a heterogeneous column containing layered, mixed, and lenticular formations of various shapes and sizes. The dispersivity for transport in both columns increased with travel distance or traveltime, thus exhibiting scale-dependency. The heterogeneous soil column also showed the effects of preferential flow, i.e., some locations in the column showed earlier solute breakthrough than several locations closer to the inlet boundary. (from Authors)
966067 Hydrofacies distribution and correlation in the Miami Valley aquifer system g. W. Ritzi Jr, D. F. Dominic, N. R. Brown, K. W. Kausch, P. J. McAlenney & M. J. Basial, Water Resources Research, 31(12), 1995, pp 3271-3281. Heterogeneity in glaciofhivial aquifers is typified by lowpermeability facies (e.g., till or lacustrine clay) juxtaposed with high-permeability facies (e.g., sand and gravel outwash). The Miami Valley aquifer system was examined at multiple sites for the spatial distribution and correlation of these two hydrofacies. Binary indicator geostatistics were used to quantitatively determine, at each site, the relative volume of each hydrofacies, their spatial distribution, the major principal direction of their spatial correlation, the minor principal direction, and the correlation range in these directions. The percent by volume of the system that is aquitard material decreases down the valley. Each site has an elevation zone with more aquitard material relative to other elevations at that site. The percent aquitard material in these zones decreases down the valley. The maximum principal direction of spatial correlation in the aquitard zones generally is subparallel to the trend of the bedrock valley. Among the sites investigated, there is a trend down the valley in the ratio of aquitard volume to aquifer volume, and the spatial correlation and distribution of aquitard material are similar within the aquitard zones. (from Authors)
RMMS 336
1
966O68 European roofing slates. Part 2: geological selected examples of slate deposits W. Wagner, R. Le Bail, M. P. Hacar-Rodriguez & S. Stanek, Zeitschriftfur Angewandte Geologie, 41(1), 1995, pp 21-26. A selection of slate deposits is discussed with respect to their geology and the mining geology. The emphasis is on the major deposits in northwest Spain (Ordovician). Deposits in northwest France (Ordovician), Czech Republic (mainly Carboniferous), Germany (Devonian and Carboniferous) and north Norway (Precambrian) are also described. The mining geology of roofing slate deposits is discussed on the basis of these deposits. (Authors) 966069 Mining/milling processes and tallings generation G. W. Poling, Marine Georesources & Geotechnology, 13(12), 1995, pp 19-31. Detailed knowledge of the mineralogy of an ore and the physical and chemical actions involved in mining and processing are all essential in predetermining the possible suitability of tailings for submarine discharge. This paper describes some of the characterizations of tailings materials that can indicate their possible suitability or nonsuitability for submarine discharge. (from Authors) 966070 Evaluation of geoteehuical and hydrogeological properties of wastes R. P. Beaven, in: Engineering geology of waste disposal, ed S.P. Bentley, (Geological Society of London; Engineering Geology Special Publication, 11), 1996, pp 57-65. The effect of landfiiling on leachate levels (through a reduction in refuse storativity) is illustrated using the results of leacbate-level monitoring at two sites. The effect of landfilling on refuse permeability is shown by results from leachate pumping tests. The physical and hydrogeological properties of refuse were investigated using a large-scale compression cell. The design and operation of the compression cell are described and preliminary results from initial testing presented. (from Author) 966071 Use of gravel washing silt in the domain of drinking water storage, geothermal storage and contaminant confinement G. De Los Cobos & A. Parriaux, Bulletin - International Association of Engineering Geology, 52, 1995, pp 53-58. Gravel washing silt from alluvium or crushed rock constitute an industrial waste whose utilisation, at the present time, is very limited and whose disposal is an environmental problem. The recovery of this by-product can be envisaged through the use of the intrinsic properties of this clayey silt: low hydraulic conductivity, homogeneity and isotropy. The basic idea would be to use this material in the construction of underground containment barriers for the management and protection of groundwater in three main areas: drinking water storage, geothermal storage and containment confinement. Measurements demonstrate promising potential for use as a water-tight confinement barrier. (from Authors) 966072 Sand sampling below the water table using the 200 mm diameter Laval sampler J.-M. Konrad, S. St-Laurent, F. Gilbert & S. Leroueil, Canadian Geotechnical Journal, 32(6), 1995, pp 1079-1086. This paper describes the different operations for sampling sand deposits. To preserve the fragile soil structure, the samples are frozen unidirectionally in open system conditions