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Scale effects in rock mechanics
326A Fresh water can discharge through the transition zone into the confining units. Suggestions are made for techniques to model layered coastal aquifers.
906024 Relation of geohydrologic setting to the potential for groundwater contamination in Utah Gates, J S; Freethey, G W Proc Symposium on Geology and Hydrology of HazardousWaste, Mining-Waste, Waste-Water and Repositories Sites in Utah, Salt Lake City, 1989 Pll-28. Publ Salt Lake City." Symposium and Field Conference, 1989 (Utah Geological Association Publication 17) Utah is divided into three distinct physiographic areas, Basin and Range, Colorado Plateau, and Middle Rocky Mountains Provinces. Groundwater resources have been developed to some degree in the first two. The last receives high annual precipitation and is an important recharge source for aquifers in other provinces. Most potential point and non-point contamination sources are known, and are situated away from recharge areas, although some mining, military, and petroleum sites are located in mountain areas. Proposed siting regulations will be based on geologic and hydrologic factors, with difference between the provinces taken into account.
906025 Implications of haline convection for waste disposal in closed basins McCleary-Hanagan, K; Duffy, C J Proc Symposium on Geology and Hydrology of HazardousWaste, Mining-Waste, Waste-Water and Repositories Sites in Utah, Salt Lake City, 1989 P29-41. Publ Salt Lake City: Symposium and Field Conference, 1989 (Utah Geological Association Publication 17) Hydrologically closed basins of Utah and Nevada have been studied as potential repository sites. There are limited field data available, and numerical analysis using the computer code SUTRA has been used to model flow paths and to indicate how mountain recharge and playa evaporation affect closed basin circulation. High evaporation rates lead to density gradients in saline groundwater. Sensitivity of the groundwater regime to climatic or man-made changes in circulation and implications to waste disposal and contaminant transfer are discussed.
906026 Optimizing short-term plume containment: comparison of well arrangements Suguino, H H; Peralta, R C Proc Symposium on Geology and Hydrology of HazardoasWaste, Mining-Waste, Waste-Water and Repositories Sites in Utah, Salt Lake City, 1989 P43-50. Publ Salt Lake City: Symposium and Field Conference, 1989 (Utah Geological Association Publication 17) Parallel, octagonal, and combined well configurations were compared as to their ability for short term groundwater contaminant plume containment in a hypothetical emergency situation. Each system used three extraction wells upgradient and three injection wells downgradient of the plume. Optimal pumping/injection was computed using MINOS, an optimization package for linear and nonlinear problems. Minimizing pumping was the objective. The octagonal configuration was most satisfactory.
906027 Remediation of waste sites using in situ treatment Sims, R C; Sims, J L; Sorensen, D L; Dupont, R L Proc Symposium on Geology and Hydrology of HazardousWaste, Mining-Waste, Waste-Water and Repositories Sites in Utah, Salt Lake City, 1989 P51-57. Publ Salt Lake City: Symposium and Field Conference, 1989 (Utah Geological Association Publication 17) In situ treatment of contaminated sites by bioremediation (degradation) or chemical immobilization of pollutant is discussed. Specific characteristics of site, soil, and waste which relate directly to treatment are examined. Treatability studies indicate potential rate and extent of remediation and are used to prepare an engineering approach to treatment of a site. Case studies for sites contaminated by organic, petroleum, and heavy metal pollutants are presented. Savings in time and cost are possible.
Chemical anti physical changes due to water 906028 Collapse of dispersive soil and its prevention using geotextiles Shou-Tian Sheng; You-Wei Hong; An-Jiang Wang Proc International Geotechnical Symposium on Theory and Practice of Earth Reinforcement, Fukuoka Kyaslm, 5-7 October 1988 P473-478. Publ Rotterdam: A A Balkema, 1988 The soils of the Song-Nen plain of Heilongjiang Province, China, are sodium rich. Earth structures of this material are liable to erosion and damage. Engineering properties of the soils were determined in the laboratory. A model test rig was developed to examine the suitability of geotextile filters to prevent erosion of these dispersive soils. The successful extension of use of full scale structures is described.
Properties of Rocks and Soils 906029 Tropical residual mils. Geological Society Engineering Group working party report Q J Engng Geol V23, N1, 1990, PI-IO1 The working party was set up in 1985 to produce a workable and practical classification of tropical residual soils with a scientific base and suitable for engineering use. The report covers origins and distribution, soil classification, field description and identification, testing and sampling, and guidelines to engineering properties and characteristics. 305 refs.
906030 Scale effects in rock mechanics Cuhna, A P Proc 1st International Workshop on Scale Effects in Rock Masses, Loen, 7-8 June 1990 P3-27. Publ Rotterdam: A A Balkema, 1990 Rock masses are inherently inhomogeneous and discontinuous and properties measured will always be dependent on the variability of rock material and the fracture network. Chosen testing points and volumes thus affect results of laboratory and field tests. A general review of scale effects associated with determination of deformability, strength, hydraulic properties, and in situ stresses is presented and an attempt is made to provide an acceptable definition of scale effect. The concept of Representative Elementary Volume is discussed. Variations and scattering of rock, rock mass, and joint properties with sample size, and superimposed effects of sampling bias and testing technique are analysed.
© 1990 Pergamon Press plc. Reproduction not permitted
906024 Relation of geohydrologic setting to the potential for groundwater contamination in Utah Gates, J S; Freethey, G W Proc Symposium on Geology and Hydrology of HazardousWaste, Mining-Waste, Waste-Water and Repositories Sites in Utah, Salt Lake City, 1989 Pll-28. Publ Salt Lake City." Symposium and Field Conference, 1989 (Utah Geological Association Publication 17) Utah is divided into three distinct physiographic areas, Basin and Range, Colorado Plateau, and Middle Rocky Mountains Provinces. Groundwater resources have been developed to some degree in the first two. The last receives high annual precipitation and is an important recharge source for aquifers in other provinces. Most potential point and non-point contamination sources are known, and are situated away from recharge areas, although some mining, military, and petroleum sites are located in mountain areas. Proposed siting regulations will be based on geologic and hydrologic factors, with difference between the provinces taken into account.
906025 Implications of haline convection for waste disposal in closed basins McCleary-Hanagan, K; Duffy, C J Proc Symposium on Geology and Hydrology of HazardousWaste, Mining-Waste, Waste-Water and Repositories Sites in Utah, Salt Lake City, 1989 P29-41. Publ Salt Lake City: Symposium and Field Conference, 1989 (Utah Geological Association Publication 17) Hydrologically closed basins of Utah and Nevada have been studied as potential repository sites. There are limited field data available, and numerical analysis using the computer code SUTRA has been used to model flow paths and to indicate how mountain recharge and playa evaporation affect closed basin circulation. High evaporation rates lead to density gradients in saline groundwater. Sensitivity of the groundwater regime to climatic or man-made changes in circulation and implications to waste disposal and contaminant transfer are discussed.
906026 Optimizing short-term plume containment: comparison of well arrangements Suguino, H H; Peralta, R C Proc Symposium on Geology and Hydrology of HazardoasWaste, Mining-Waste, Waste-Water and Repositories Sites in Utah, Salt Lake City, 1989 P43-50. Publ Salt Lake City: Symposium and Field Conference, 1989 (Utah Geological Association Publication 17) Parallel, octagonal, and combined well configurations were compared as to their ability for short term groundwater contaminant plume containment in a hypothetical emergency situation. Each system used three extraction wells upgradient and three injection wells downgradient of the plume. Optimal pumping/injection was computed using MINOS, an optimization package for linear and nonlinear problems. Minimizing pumping was the objective. The octagonal configuration was most satisfactory.
906027 Remediation of waste sites using in situ treatment Sims, R C; Sims, J L; Sorensen, D L; Dupont, R L Proc Symposium on Geology and Hydrology of HazardousWaste, Mining-Waste, Waste-Water and Repositories Sites in Utah, Salt Lake City, 1989 P51-57. Publ Salt Lake City: Symposium and Field Conference, 1989 (Utah Geological Association Publication 17) In situ treatment of contaminated sites by bioremediation (degradation) or chemical immobilization of pollutant is discussed. Specific characteristics of site, soil, and waste which relate directly to treatment are examined. Treatability studies indicate potential rate and extent of remediation and are used to prepare an engineering approach to treatment of a site. Case studies for sites contaminated by organic, petroleum, and heavy metal pollutants are presented. Savings in time and cost are possible.
Chemical anti physical changes due to water 906028 Collapse of dispersive soil and its prevention using geotextiles Shou-Tian Sheng; You-Wei Hong; An-Jiang Wang Proc International Geotechnical Symposium on Theory and Practice of Earth Reinforcement, Fukuoka Kyaslm, 5-7 October 1988 P473-478. Publ Rotterdam: A A Balkema, 1988 The soils of the Song-Nen plain of Heilongjiang Province, China, are sodium rich. Earth structures of this material are liable to erosion and damage. Engineering properties of the soils were determined in the laboratory. A model test rig was developed to examine the suitability of geotextile filters to prevent erosion of these dispersive soils. The successful extension of use of full scale structures is described.
Properties of Rocks and Soils 906029 Tropical residual mils. Geological Society Engineering Group working party report Q J Engng Geol V23, N1, 1990, PI-IO1 The working party was set up in 1985 to produce a workable and practical classification of tropical residual soils with a scientific base and suitable for engineering use. The report covers origins and distribution, soil classification, field description and identification, testing and sampling, and guidelines to engineering properties and characteristics. 305 refs.
906030 Scale effects in rock mechanics Cuhna, A P Proc 1st International Workshop on Scale Effects in Rock Masses, Loen, 7-8 June 1990 P3-27. Publ Rotterdam: A A Balkema, 1990 Rock masses are inherently inhomogeneous and discontinuous and properties measured will always be dependent on the variability of rock material and the fracture network. Chosen testing points and volumes thus affect results of laboratory and field tests. A general review of scale effects associated with determination of deformability, strength, hydraulic properties, and in situ stresses is presented and an attempt is made to provide an acceptable definition of scale effect. The concept of Representative Elementary Volume is discussed. Variations and scattering of rock, rock mass, and joint properties with sample size, and superimposed effects of sampling bias and testing technique are analysed.
© 1990 Pergamon Press plc. Reproduction not permitted