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Design of groundwater monitoring systems — hydrogeologic considerations
250A
895170 Satellite-based digital data system for low-frequency geophysical data Silverman, S; Mortensen, C; Johnston, M Bull Seismoi Soc Am 1/79, NI, Feb 1989. P189-198 A remote monitoring system for collection, display, and analysis of low frequency geophysical data for earthquake hazard and crustal deformation studies is described. Real time monitoring of tilt, strain, fault displacement, local magnetic field, crustal geochemistry, water level, and meterological details is possible. Data are processed to determine changes indicating first stages of catastrophic fault failure. The telemetry system, retrieval system, data display and analysis system are described. 895171 Automated dam management for dam safety evaluations Walz, A H lnt Water Power Dam Constr 1/41, N4, April 1989, P23-25 Recent developments in electronics and computing have made possible operation of real time remote monitoring of dam conditions. Design considerations and requirements, hardware and software, instrument automation, and communications are described. Safety and backup requirements are discussed. The necessity to maintain visual inspection despite full time monitoring is emphasised.
895172 Tilt observations using borehole tiltmeters. 1. Analysis of tidal and secular tilt Levine, J, Meertens, C; Busby, R J Geopkys Res V94, NBI, Jan 1989. P574-586 A sensitive borehole tiltmeter, using two horizontal pendulums with periods of Is, has been developed. Borehole and instrument design, and methods for recording and analysing tilt are described. Preliminary results are illustrated, concentrating on the measurement of tilt tides, which provides information on the elastic constants of the earth. 895173 Displacement of surface monuments: vertical motion Wyatt, F K J Geophys Res V94o NB2. Feb 1988, P1655-1664 Weathering of surficial rocks can introduce inaccuracy into direct measurement of crustal deformation via surface monuments, for short distances and time scales. Field observations from a semi-arid location with 0.3m of sand over granodiorite rock with weathering down to 15-20m are presented. Displacements, corrected for effects of atmospheric and precipitation loading and tidal strains, show vertical strains near the surface are a poor measure of areal strain. For areas of ground instability and generally small rate of crustal motions, deeply emplaced monuments are required to detect short term changes in crustal deformation over small baseline distances.
895174 Simple monitorings of rock behaviour for safe underground mining Mizuta, Y; Sane, O; Sudo, S; Noumi, T; Sakuma, S Key Questions in Rock Mechanics: Proc 29th US Symposium, Minneapolis, 13-15 June 1988 P709-717. Publ Rotterdam: A A Baikema, 1988 Stresses and deformations were monitored in two underground mines in Japan. Stresses were measured by flat jacks, hydraulic fracturing, and pressure cells. Deformations were monitored using fluid levels in connected vessels and a laser beam device. Induced roof measurements were compared with
those predicted by boundary element analysis. The pressure cell was seen to be particularly suitable for the mining environment. 895175 Suitability of MPBX instrumentation for the monitoring of rock mass displacements Bellman, g A; Mann, K; Luker, S; Zimmerman, g Key Questions in Rock Mechanics: Proc 29tb US Symposium, Minneapolis, 13-15 June 1988 P723-724. Publ Rotterdam: A A Balkema, 1988 Performances of the multiple point borehole extensometer and three commercially available extensometers, direct current linear variable differential transformer (DC-LVDT), linear potentiometer, and the sonic probe, were compared. Suitability in terms of installation, survivability,and accuracy was examined, using experimental data from repository research in welded tuff in Nevada, USA. 895176 Monitoring plan of the Torrao hydraulic circuit Cunha, A P Proe Symposium on Rock Mechanics and Power Plants, Madrid, 12-16 September 1988 VI, P293-298. Publ Rotterdam: A A Balkema, 1988 A comprehensive monitoring programme was adopted at the Torrao hydroelectric project in Portugal. Convergence and displacement, water pressure in the rock mass, stress in the rock mass, and slope stability of the underground structures are continually checked. All surfaces were geotechnically mapped and rock properties measured. Results after first filling of the reservoir show a seasonal cycle of movement, but there is no evidence of long term instability. 895177 Multiple level groundwater monitoring at the FMC trona plant, Green River,Wyoming Nash, W K; Askey, J L; Black, W; Rehtlane, E Proc 9th Annual Symposium on Geotechnical and Geohydrological Aspects of Waste Management, Fort Collins, 1-6 February 1987 t'259-269. Publ Chelsea, Michigan: Lewis, 1987 A multilevel monitoring system was set up to examine groundwater movements around surface processing plants and waste water lagoons. Technical and economic comparisons were made between clustered standpipe and the MP multiple level piezometer systems, the latter being adopted. Fluid pressures and samples were taken at 140 points in 25 drill holes of depth 18-82m. Installation and operation are described and initial results presented in the form of a geological cross-section showing fluid equipotential lines.
895178 Design of groundwater monitoring systems - hydrngeologic considerations Mehnert, E; Herzog, B L; Johnson, T M Proc 9tk Annual Symposium on Geoteehnicai and Geohydrological Aspects of Waste Management, Fort Collins, 1-6 February 1987 P271-285. Publ Chelsea, Michigan: Lewis, 1987 Groundwater monitoring systems for hazardous waste management systems, conforming to legal requirements of Illinois, USA, are discussed with reference to three case studies. Attention is paid to ensuring that regional geology is fully characterised, field investigations are sufficient in quantity and quality of interpretation, and that sufficient instrumentation is correctly installed.
1989 Pergamon Press pie. Reproduction not permitted
895170 Satellite-based digital data system for low-frequency geophysical data Silverman, S; Mortensen, C; Johnston, M Bull Seismoi Soc Am 1/79, NI, Feb 1989. P189-198 A remote monitoring system for collection, display, and analysis of low frequency geophysical data for earthquake hazard and crustal deformation studies is described. Real time monitoring of tilt, strain, fault displacement, local magnetic field, crustal geochemistry, water level, and meterological details is possible. Data are processed to determine changes indicating first stages of catastrophic fault failure. The telemetry system, retrieval system, data display and analysis system are described. 895171 Automated dam management for dam safety evaluations Walz, A H lnt Water Power Dam Constr 1/41, N4, April 1989, P23-25 Recent developments in electronics and computing have made possible operation of real time remote monitoring of dam conditions. Design considerations and requirements, hardware and software, instrument automation, and communications are described. Safety and backup requirements are discussed. The necessity to maintain visual inspection despite full time monitoring is emphasised.
895172 Tilt observations using borehole tiltmeters. 1. Analysis of tidal and secular tilt Levine, J, Meertens, C; Busby, R J Geopkys Res V94, NBI, Jan 1989. P574-586 A sensitive borehole tiltmeter, using two horizontal pendulums with periods of Is, has been developed. Borehole and instrument design, and methods for recording and analysing tilt are described. Preliminary results are illustrated, concentrating on the measurement of tilt tides, which provides information on the elastic constants of the earth. 895173 Displacement of surface monuments: vertical motion Wyatt, F K J Geophys Res V94o NB2. Feb 1988, P1655-1664 Weathering of surficial rocks can introduce inaccuracy into direct measurement of crustal deformation via surface monuments, for short distances and time scales. Field observations from a semi-arid location with 0.3m of sand over granodiorite rock with weathering down to 15-20m are presented. Displacements, corrected for effects of atmospheric and precipitation loading and tidal strains, show vertical strains near the surface are a poor measure of areal strain. For areas of ground instability and generally small rate of crustal motions, deeply emplaced monuments are required to detect short term changes in crustal deformation over small baseline distances.
895174 Simple monitorings of rock behaviour for safe underground mining Mizuta, Y; Sane, O; Sudo, S; Noumi, T; Sakuma, S Key Questions in Rock Mechanics: Proc 29th US Symposium, Minneapolis, 13-15 June 1988 P709-717. Publ Rotterdam: A A Baikema, 1988 Stresses and deformations were monitored in two underground mines in Japan. Stresses were measured by flat jacks, hydraulic fracturing, and pressure cells. Deformations were monitored using fluid levels in connected vessels and a laser beam device. Induced roof measurements were compared with
those predicted by boundary element analysis. The pressure cell was seen to be particularly suitable for the mining environment. 895175 Suitability of MPBX instrumentation for the monitoring of rock mass displacements Bellman, g A; Mann, K; Luker, S; Zimmerman, g Key Questions in Rock Mechanics: Proc 29tb US Symposium, Minneapolis, 13-15 June 1988 P723-724. Publ Rotterdam: A A Balkema, 1988 Performances of the multiple point borehole extensometer and three commercially available extensometers, direct current linear variable differential transformer (DC-LVDT), linear potentiometer, and the sonic probe, were compared. Suitability in terms of installation, survivability,and accuracy was examined, using experimental data from repository research in welded tuff in Nevada, USA. 895176 Monitoring plan of the Torrao hydraulic circuit Cunha, A P Proe Symposium on Rock Mechanics and Power Plants, Madrid, 12-16 September 1988 VI, P293-298. Publ Rotterdam: A A Balkema, 1988 A comprehensive monitoring programme was adopted at the Torrao hydroelectric project in Portugal. Convergence and displacement, water pressure in the rock mass, stress in the rock mass, and slope stability of the underground structures are continually checked. All surfaces were geotechnically mapped and rock properties measured. Results after first filling of the reservoir show a seasonal cycle of movement, but there is no evidence of long term instability. 895177 Multiple level groundwater monitoring at the FMC trona plant, Green River,Wyoming Nash, W K; Askey, J L; Black, W; Rehtlane, E Proc 9th Annual Symposium on Geotechnical and Geohydrological Aspects of Waste Management, Fort Collins, 1-6 February 1987 t'259-269. Publ Chelsea, Michigan: Lewis, 1987 A multilevel monitoring system was set up to examine groundwater movements around surface processing plants and waste water lagoons. Technical and economic comparisons were made between clustered standpipe and the MP multiple level piezometer systems, the latter being adopted. Fluid pressures and samples were taken at 140 points in 25 drill holes of depth 18-82m. Installation and operation are described and initial results presented in the form of a geological cross-section showing fluid equipotential lines.
895178 Design of groundwater monitoring systems - hydrngeologic considerations Mehnert, E; Herzog, B L; Johnson, T M Proc 9tk Annual Symposium on Geoteehnicai and Geohydrological Aspects of Waste Management, Fort Collins, 1-6 February 1987 P271-285. Publ Chelsea, Michigan: Lewis, 1987 Groundwater monitoring systems for hazardous waste management systems, conforming to legal requirements of Illinois, USA, are discussed with reference to three case studies. Attention is paid to ensuring that regional geology is fully characterised, field investigations are sufficient in quantity and quality of interpretation, and that sufficient instrumentation is correctly installed.
1989 Pergamon Press pie. Reproduction not permitted