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Countermeasures for and monitoring of land subsidence in the northwestern part of the Kanto Plain, Japan
341A empirical curves. Spectral amplifications for different zones are evaluated. It is suggested that soil amplification and reflected crustal shear energy are the main contributors to the damaging levels of ground motion.
Hydrogeology Groundwater See abo: 926059, 926157, 926186, 926192
926015 Multimechanism friction constitutive model for ultrafine quartz gouge at hypocentral conditions Chester, F M; Higgs, N G J Geophys Res 1/97, NB2, Feb 1992, P1859-1870 A temperature dependent friction constitutive model is presented to describe slip on crustal faults. The model is used to analyse laboratory triaxial friction test results on ultrafinegrained quartz gouge at temperatures to 600 deg C, confining pressures to 150 MPa, and under air dry or saturated conditions. Stress relaxation response and slip history effects during slide-hold-slide experiments with hold times up to 30 hours are described. Low and high temperature slip regimes are seen. Relevance to faulting at crustal conditions is discussed.
926016 Reservoir-induced earthquake and deep-well-injection earthquake Chunshan Jin Proc 6th International Congress International Association o f Engineering Geology, Amsterdam, 6-10 August 1990 V4, P2757-2762. Publ Rotterdam: A A Balkema, 1990 Reservoir induced seismicity as a result of fluid flow and crustal dilatancy has similar characteristics to that produced during deep well injection. The common features are examined and mechanisms discussed. Field data from deep well injection seismicity are the more easily obtainable and quantifiable. Based on a study from deep well injection, a method is proposed to allow prediction of reservoir induced seismicity.
926017 Activity of tectonic fault and the researches for its mechanism related to rock mechanics Tao Zhen-Yu; Zhang Li-Ming; Chen Tie-Min Rock Mechanics as a Multidisciplinary Science, Proc 32nd US Symposium, Norman, 10-12 July 1991 Pl145-1154. Publ Rotterdam. A A Balkema, 1991 The self lock model for stick slip behaviour of faulted rock is presented. It provides a possible mechanism for earthquakes. A mathematical simulation of faulted rock, taking into account the viscoelastoplastic nature of rock and the self lock model, is illustrated. It provides a good simulation of an earthquake sequence and may be used to analyse fault activity.
Frost action, permafrost and frozen ground See." 926081
926018 Countermeasures for and monitoring of land subsidence in the northwestern part of the Kanto Plain, Japan Nakao, T; Kamata, A Proe 4th International Conference on Land Subsidence, Houston, 12-17 May 1991 P525-532. Publ I A H S Press: Walling)Cord, 1991 Groundwater conditions and land subsidence in the Saitama Prefecture are outlined. Upper alluvial phreatic aquifers and lower diluvial artesian aquifers are exploited. Subsidence monuments and water table movements have been monitored over long periods. Groundwater level decline to 20m below sea level and subsidence rates up to 42mm/yr are reported. To prevent potential disasters resulting from groundwater overdraft, a program to control pumping and improve management of water use is in place.
Chemical and physical changes due to water 926019 Remedial actions at operating petrochemical sites Vreeken, C; van Eyk, J; Loxham, J; Visser, W Geotechnique V42, N1, March 1992, P23-31 Petrochemical sites are prohibitively expensive to shut for pollution remediation and assessment and action must take place in a confined and complicated environment. Hydrocarbon transport mechanisms are described. A method for determining risk and choice of treatment is presented, based on the premise that risk can be expressed in terms of contaminant concentration near the target and calculated using the system analytical model REFCON. In situ treatment techniques, water flushing, steam flushing, air stripping, bioflushing, and bioventing, are described and their applicability to specific contaminants discussed.
926020 Use of solute and isotopic chemistry to identify flow patterns and factors which limit acid mine drainage in the Wasatch Range, Utah Mayo, A L; Nielsen, P J; Loucks, M; Brimhall, W H Ground Water V30, N2, March-April 1992, P243-249 Silver mining in the Wasatch Range ceased in the 1970s, after about 100 years. Most of the mine drain waters issuing from suphide mineralised zones are neutral, only a few having acid drainage. The chemical evolution of these waters follows fundamentally different chemical and isotopic evolutionary pathways, which reflect different flow histories. It is demonstrated how small amounts of relatively inexpensive geochemical and isotopic data can be used to provide information on flow patterns and help solve a complex geohydrological problem.
© 1992 Pergamon Press Ltd. Reproduction not permitted
Hydrogeology Groundwater See abo: 926059, 926157, 926186, 926192
926015 Multimechanism friction constitutive model for ultrafine quartz gouge at hypocentral conditions Chester, F M; Higgs, N G J Geophys Res 1/97, NB2, Feb 1992, P1859-1870 A temperature dependent friction constitutive model is presented to describe slip on crustal faults. The model is used to analyse laboratory triaxial friction test results on ultrafinegrained quartz gouge at temperatures to 600 deg C, confining pressures to 150 MPa, and under air dry or saturated conditions. Stress relaxation response and slip history effects during slide-hold-slide experiments with hold times up to 30 hours are described. Low and high temperature slip regimes are seen. Relevance to faulting at crustal conditions is discussed.
926016 Reservoir-induced earthquake and deep-well-injection earthquake Chunshan Jin Proc 6th International Congress International Association o f Engineering Geology, Amsterdam, 6-10 August 1990 V4, P2757-2762. Publ Rotterdam: A A Balkema, 1990 Reservoir induced seismicity as a result of fluid flow and crustal dilatancy has similar characteristics to that produced during deep well injection. The common features are examined and mechanisms discussed. Field data from deep well injection seismicity are the more easily obtainable and quantifiable. Based on a study from deep well injection, a method is proposed to allow prediction of reservoir induced seismicity.
926017 Activity of tectonic fault and the researches for its mechanism related to rock mechanics Tao Zhen-Yu; Zhang Li-Ming; Chen Tie-Min Rock Mechanics as a Multidisciplinary Science, Proc 32nd US Symposium, Norman, 10-12 July 1991 Pl145-1154. Publ Rotterdam. A A Balkema, 1991 The self lock model for stick slip behaviour of faulted rock is presented. It provides a possible mechanism for earthquakes. A mathematical simulation of faulted rock, taking into account the viscoelastoplastic nature of rock and the self lock model, is illustrated. It provides a good simulation of an earthquake sequence and may be used to analyse fault activity.
Frost action, permafrost and frozen ground See." 926081
926018 Countermeasures for and monitoring of land subsidence in the northwestern part of the Kanto Plain, Japan Nakao, T; Kamata, A Proe 4th International Conference on Land Subsidence, Houston, 12-17 May 1991 P525-532. Publ I A H S Press: Walling)Cord, 1991 Groundwater conditions and land subsidence in the Saitama Prefecture are outlined. Upper alluvial phreatic aquifers and lower diluvial artesian aquifers are exploited. Subsidence monuments and water table movements have been monitored over long periods. Groundwater level decline to 20m below sea level and subsidence rates up to 42mm/yr are reported. To prevent potential disasters resulting from groundwater overdraft, a program to control pumping and improve management of water use is in place.
Chemical and physical changes due to water 926019 Remedial actions at operating petrochemical sites Vreeken, C; van Eyk, J; Loxham, J; Visser, W Geotechnique V42, N1, March 1992, P23-31 Petrochemical sites are prohibitively expensive to shut for pollution remediation and assessment and action must take place in a confined and complicated environment. Hydrocarbon transport mechanisms are described. A method for determining risk and choice of treatment is presented, based on the premise that risk can be expressed in terms of contaminant concentration near the target and calculated using the system analytical model REFCON. In situ treatment techniques, water flushing, steam flushing, air stripping, bioflushing, and bioventing, are described and their applicability to specific contaminants discussed.
926020 Use of solute and isotopic chemistry to identify flow patterns and factors which limit acid mine drainage in the Wasatch Range, Utah Mayo, A L; Nielsen, P J; Loucks, M; Brimhall, W H Ground Water V30, N2, March-April 1992, P243-249 Silver mining in the Wasatch Range ceased in the 1970s, after about 100 years. Most of the mine drain waters issuing from suphide mineralised zones are neutral, only a few having acid drainage. The chemical evolution of these waters follows fundamentally different chemical and isotopic evolutionary pathways, which reflect different flow histories. It is demonstrated how small amounts of relatively inexpensive geochemical and isotopic data can be used to provide information on flow patterns and help solve a complex geohydrological problem.
© 1992 Pergamon Press Ltd. Reproduction not permitted