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A guide to wellhead protection
296A
HYDROGEOLOGY:PHYSICO-CHEMICAL
proposed, a mechanical interaction between the contiguous Pacific and Australian plates. (Journal summary)
HYDROGEOLOGY Groundwater 967041 Groundwater management. Proceedings of an international symposium, San Antonio, August 1995
ed R. J. Charbeneau, (American Society of Civil Engineers, New York), ISBN (paperback) 0 7844 0107 1, 1995,418 pp, indexes. This proceedings contains papers presented at the Intemational Symposium held in San Antonio, August 1995 in conjunction with ASCE’s First International Conference on Water Resources Management. It covers such issues as: models of remediation systems; groundwater quality; hydrologic models; groundwaterlsurface water interactions; nonaqueous phase liquids; contaminant transport; wellhead protection. (from Publisher) 967042 A guide to wellhead protection J. Witten, S. Horsley, S. Jeer & E. K. Flanagan, American Planning Association, 457-458, 1995, 102 pp.
Report Planning Advisory Service,
This report is about groundwater protection. Groundwater protection is also called wellhead, welllield, aquifer, drinking water, and source water protection. The purpose is to prevent groundwater contamination before it occurs. The report is part of a continuing effort to offer information to citizens, public officials, and planners that will help them build effective and economical groundwater protection programs at the local level. The renort is divided into the following chapters: introduction to’groundwater hydrology; the causes and effects of wellhead contamination; wellhead management and protection; and financing strategies for wellhead protection. (after Authors) 967043 Transport of a tracer slug in a fractured permeable formation H. Rubin, A. M. Soliman, J. Birkholzer & G. Rouve, Journal OfHydrology, 176(1-4), 1996, pp 153-180. This paper concerns the migration of a tracer slug injected into a fractured permeable formation. It is shown that various time and length scales characterize the phenomena involved in tracer slug migration. It is found that, in cross-sections located at a small distance from the tracer injection point, two maximum values of tracer concentration are expected in the breakthrough curves. In cross-sections located at comparatively large distances from the tracer injection point, the break-through curves are similar to those characterizing an ideal porous media. (from Authors) 967044 Transverse dispersion of contaminants in fractured permeable formations H. Rubin & R. W. Buddemeier, Journal of Hydrology, 176(14). 1996, pp 133-151. Attempts-to explain some of the mechanisms involved in the mineralization of the Great Bend Prairie aauifer of Kansas by salt water originating from Permian bedrock fractured sandstones. The fractured permeable formation is represented by a simplified conceptual model incorporating two sets of oblique and parallel fractures embedded in permeable blocks. The domain is initiallv divided into a completely freshwater zone overlying a completely saline water zone. However, the sharp interface is subject to dispersion because of mixing in fracture intersections and between the fracture flow and the permeable block flow. Simulations help characterize dispersion of the sharp interface and creation of the transition zone.
CHANGES
Relationships of transverse and longitudinal dispersion in the domain are also determined. (from Authors) 967045 Conceptual evaluation of regional ground-water flow in the carbonate-rock province of the Great Basin, Nevada, Utah, and adjacent states D. E. Prudic, J. R. Harrill & T. J. Burbey, US Geological Survey Professional Paper, 1409-D, 1995, 102 pp. The carbonate-rock province of the Great Basin, mainly in eastern Nevada and western Utah, is characterized by thick sequences of carbonate rocks of Paleozoic age. These rocks overlie elastic and crystalline rocks of Cambrian and Precambrian age, respectively. Since the carbonate rocks were deposited, structural compression and extension, intrusive and volcanic episodes, and erosion have greatly modified their distribution and thickness, and a variety of younger rocks and deposits have been emplaced within and above them. Regional ground-water flow in the province has been studied as part of the Great Basin Regional Aquifer-System Analysis. In conclusion, most ground-water flow is relatively shallow, moving from recharge areas in the mountain ranges to discharge areas in adjacent valleys. Results suggest that not all carbonate rocks are highly permeable or that not all valleys and surrounding mountains are underlain by carbonate rocks. (from Authors) 967046 Chemical composition of bard- and softrock groundwaters from central Norway with special consideration of fluoride and Norwegian drinking water limits 0. M. Saether, C. Reimann, B. 0. Hilmo & E. Taushani, Environmental Geology, 26(3), 1995, pp 147-156. Groundwaters from crystalline and metamorphic rocks and from Quatemary deposits from the counties of Nord- and Sor-Trondelag were analyzed for major and minor elements and ions including fluoride. The median concentration of Fin water from the hard-rock aquifers is 0.28 mdl(l4.7 peq/l) in contrast to water from softrock aquifers in which it is found to be 0.05 mdl(2.6 peq/l). More importantly, ca. 15% of the locations where water was abstracted from hardrock wells contain 1.5 mg/l(78.9 peq/l) F- or more. Results suggest that all hardrock wells drilled should be tested for F- and the users informed about the results and advised to take any necessary precautions. (from Authors) 967047 A computing model based on cyclic consolidation tests Gu Xiao-Yun, Xu Da-Neng Jz Deng Wei, in: Land subsidence. Proc. international symposium, The Hague, 1995, ed F.B.J. Barends & others, (IAHS; Publication,
234), 1995, pp 295-303. The primary and secondary consolidation tests under cyclic loading are carried out to simulate the yearly periodical fluctuation of groundwater levels in Shanghai. The computing model is verified by the experimental data, and the soil parameters are obtained. The computation by using finite differential method is conducted, and the results prove the validity of the model. (Authors)
Chemical and physical changes 967048
Finite element modelling for land displacements due to pumping Hund-Der Yeh, Ruey-Hsing Lu & Gour-Tsyh TYh, Znternational Journal for Numerical & Analytical Geomechanics, 20(2), 1996, pp 79-99.
Methods
in
Equations of equilibrium (force balance) and flow in multidimensions were coupled in this paper to describe land displacements due to pressure decline in aquifers. A Galerkin finite element model based on these equations was developed. Results demonstrated that the choice of boundary ranges for an aquifer with infinite domain may significantly affect the
HYDROGEOLOGY:PHYSICO-CHEMICAL
proposed, a mechanical interaction between the contiguous Pacific and Australian plates. (Journal summary)
HYDROGEOLOGY Groundwater 967041 Groundwater management. Proceedings of an international symposium, San Antonio, August 1995
ed R. J. Charbeneau, (American Society of Civil Engineers, New York), ISBN (paperback) 0 7844 0107 1, 1995,418 pp, indexes. This proceedings contains papers presented at the Intemational Symposium held in San Antonio, August 1995 in conjunction with ASCE’s First International Conference on Water Resources Management. It covers such issues as: models of remediation systems; groundwater quality; hydrologic models; groundwaterlsurface water interactions; nonaqueous phase liquids; contaminant transport; wellhead protection. (from Publisher) 967042 A guide to wellhead protection J. Witten, S. Horsley, S. Jeer & E. K. Flanagan, American Planning Association, 457-458, 1995, 102 pp.
Report Planning Advisory Service,
This report is about groundwater protection. Groundwater protection is also called wellhead, welllield, aquifer, drinking water, and source water protection. The purpose is to prevent groundwater contamination before it occurs. The report is part of a continuing effort to offer information to citizens, public officials, and planners that will help them build effective and economical groundwater protection programs at the local level. The renort is divided into the following chapters: introduction to’groundwater hydrology; the causes and effects of wellhead contamination; wellhead management and protection; and financing strategies for wellhead protection. (after Authors) 967043 Transport of a tracer slug in a fractured permeable formation H. Rubin, A. M. Soliman, J. Birkholzer & G. Rouve, Journal OfHydrology, 176(1-4), 1996, pp 153-180. This paper concerns the migration of a tracer slug injected into a fractured permeable formation. It is shown that various time and length scales characterize the phenomena involved in tracer slug migration. It is found that, in cross-sections located at a small distance from the tracer injection point, two maximum values of tracer concentration are expected in the breakthrough curves. In cross-sections located at comparatively large distances from the tracer injection point, the break-through curves are similar to those characterizing an ideal porous media. (from Authors) 967044 Transverse dispersion of contaminants in fractured permeable formations H. Rubin & R. W. Buddemeier, Journal of Hydrology, 176(14). 1996, pp 133-151. Attempts-to explain some of the mechanisms involved in the mineralization of the Great Bend Prairie aauifer of Kansas by salt water originating from Permian bedrock fractured sandstones. The fractured permeable formation is represented by a simplified conceptual model incorporating two sets of oblique and parallel fractures embedded in permeable blocks. The domain is initiallv divided into a completely freshwater zone overlying a completely saline water zone. However, the sharp interface is subject to dispersion because of mixing in fracture intersections and between the fracture flow and the permeable block flow. Simulations help characterize dispersion of the sharp interface and creation of the transition zone.
CHANGES
Relationships of transverse and longitudinal dispersion in the domain are also determined. (from Authors) 967045 Conceptual evaluation of regional ground-water flow in the carbonate-rock province of the Great Basin, Nevada, Utah, and adjacent states D. E. Prudic, J. R. Harrill & T. J. Burbey, US Geological Survey Professional Paper, 1409-D, 1995, 102 pp. The carbonate-rock province of the Great Basin, mainly in eastern Nevada and western Utah, is characterized by thick sequences of carbonate rocks of Paleozoic age. These rocks overlie elastic and crystalline rocks of Cambrian and Precambrian age, respectively. Since the carbonate rocks were deposited, structural compression and extension, intrusive and volcanic episodes, and erosion have greatly modified their distribution and thickness, and a variety of younger rocks and deposits have been emplaced within and above them. Regional ground-water flow in the province has been studied as part of the Great Basin Regional Aquifer-System Analysis. In conclusion, most ground-water flow is relatively shallow, moving from recharge areas in the mountain ranges to discharge areas in adjacent valleys. Results suggest that not all carbonate rocks are highly permeable or that not all valleys and surrounding mountains are underlain by carbonate rocks. (from Authors) 967046 Chemical composition of bard- and softrock groundwaters from central Norway with special consideration of fluoride and Norwegian drinking water limits 0. M. Saether, C. Reimann, B. 0. Hilmo & E. Taushani, Environmental Geology, 26(3), 1995, pp 147-156. Groundwaters from crystalline and metamorphic rocks and from Quatemary deposits from the counties of Nord- and Sor-Trondelag were analyzed for major and minor elements and ions including fluoride. The median concentration of Fin water from the hard-rock aquifers is 0.28 mdl(l4.7 peq/l) in contrast to water from softrock aquifers in which it is found to be 0.05 mdl(2.6 peq/l). More importantly, ca. 15% of the locations where water was abstracted from hardrock wells contain 1.5 mg/l(78.9 peq/l) F- or more. Results suggest that all hardrock wells drilled should be tested for F- and the users informed about the results and advised to take any necessary precautions. (from Authors) 967047 A computing model based on cyclic consolidation tests Gu Xiao-Yun, Xu Da-Neng Jz Deng Wei, in: Land subsidence. Proc. international symposium, The Hague, 1995, ed F.B.J. Barends & others, (IAHS; Publication,
234), 1995, pp 295-303. The primary and secondary consolidation tests under cyclic loading are carried out to simulate the yearly periodical fluctuation of groundwater levels in Shanghai. The computing model is verified by the experimental data, and the soil parameters are obtained. The computation by using finite differential method is conducted, and the results prove the validity of the model. (Authors)
Chemical and physical changes 967048
Finite element modelling for land displacements due to pumping Hund-Der Yeh, Ruey-Hsing Lu & Gour-Tsyh TYh, Znternational Journal for Numerical & Analytical Geomechanics, 20(2), 1996, pp 79-99.
Methods
in
Equations of equilibrium (force balance) and flow in multidimensions were coupled in this paper to describe land displacements due to pressure decline in aquifers. A Galerkin finite element model based on these equations was developed. Results demonstrated that the choice of boundary ranges for an aquifer with infinite domain may significantly affect the