Site Assessment & Investigation

Grisak, G. E., N. A.  Baker, D. H.  Granger and S. L.  Cook, 2007.  Refraction of the Regional Water Table at the Southwestern Edge of the Southern High Plains.  Invited Paper: Abstract.  Geological Society of America Annual Meeting, Denver, Colorado, October 28-31, 2007.

Grisak, G.  E., N. A. Baker, D. H.  Granger, S. L.  Cook and B. K.  Darling, 2007.  The Red Bed Ridge and Other Geologic and Hydrogeologic Aspects of the Southwestern Feather Edge of the High Plains Aquifer.  Abstract accepted at Geological Society of America Annual Meeting, Denver, Colorado, October 28-31, 2007.

Kelley, V. A. and S. Mishra, 2006.  An Efficient Approach to Quantifying Uncertainty in Groundwater Model Predictions, published in the AAPG Computer Application in Geology Textbook, Stochastic Modeling II.  American Association of  Petroleum Geologists; Editors; J.  Yarus and R.  Chambers.

Mishra, S., J. F. Pickens, and J. Delay, 2006. New Approaches for Transient Testing and Long-Term Pressure Monitoring of Low-Permeability Caprocks. Presentation at the International Symposium for CO2 Sequestration, 20-22 March, 2006. Berkeley, California. Published in proceedings volume.

Jackson, R. E., V. Dwarakanath, J. E. Ewing, and  J. Avis.  2006. Migration of viscousnon-aqueous phase liquids (NAPLs) in alluvium, Fraser River lowlands, British Columbia. Canadian Geotechnical Journal 43 (7):694-703.

Holzmer, F. J, V. Dwarakanath, J. E. Ewing, M. Jin, R. E. Jackson. 2005. Characterization of Tetrachloroethene DNAPL in Low-Permeability Coastal Plain Sediments, North Carolina.  Environmental & Engineering Geoscience 11 (3):197-208.

Mishra, S. , N. E. Deeds, J. F. Pickens, J. Delay and M. Distinguin, 2005. Heterogeneity in a Low-Permeability Formation or Non-Ideal Testing Conditions? Paper presented at AGU Fall Meeting, San Francisco, CA, December 5-8.

Grisak, G. E. , C. Kohl, N. A. Baker and H. W. Meinardus, 2003. Offset Shotholes in West Texas: Displacement measurements after Nine Years: Technical Note. Submitted to Association of Engineering Geologists, 2003.

Altman, S. J.,  L. C. Meigs, T. L. Jones, and S. A. McKenna. 2002. Controls of mass recovery rates insingle-well injection-withdrawal tracer tests with a single-porosity, heterogeneous conceptualization, Water Resources Research, Vol. 38, no. 7.

Erskine, D.W., P.W. Bergman and D.L. Wacker. 2002. Use of produced water for oil and gas drilling in the San Juan Basin. Proceedings of the 9th Annual International Petroleum Environmental Conference; 2002 Oct. 22-25; Albuquerque NM.

Saba, T.,  T. H. Illangasekare, and J. Ewing, 2001. Investigation of surfactant-enhanced dissolution ofen trapped non-aqueous-phase liquid chemicals in two-dimensional ground waterflow field. Journal of Contaminant Hydrology 51 (12):63-82.

Lavenue, M. and G. DeMarsily, 2001. Three-Dimensional Pumping Test Interpretation in a Fractured Aquifer Using the Pilot Point Inverse Method, Water Resources Research, 37(11);2659-2675.

Erskine, D.W., A.C. Stringer, W.P. Goranson, P.J. Luthiger and C.L. Yancey. 2001. Alluvial groundwater compliance at auranium mill tailings site, Ambrosia Lake Valley, New Mexico. Proceedings of the Northwest Mining Association 107th Annual Meeting; 2001 Dec. 3-7; SpokaneWA.

Kelley, V. A. and S. Mishra, 2000. An Efficient Approach to Quantifying Uncertainty in Groundwater Model Predictions, AAPG Hedberg Research Conference on "Applied Reservoir Characterization Using Geostatistics", December 3-6, 2000, The Woodlands, TX.

Kelley, V. A. , D. Donohue, J. A. Beach, and N. Deeds, 2000. An Approach to Incorporating Coastal Plain Stratigraphy into a Flow Model, Invited paper presented the "Hydrology Symposium I, Modeling Aquifer Heterogeneity, January 20-21, 2000, University of South Carolina, Columbia, SC.

Lavenue, A. M. , B. S. Rama Rao, G. Ruskauff, and G. deMarsily. 2000. A direct uncertainty analysis technique: Coupling geologic and ground water flow simulation and the pilot point inverse method. Presented at the AAPG Hedberg Symposium, Applied Reservoir Characterization Using Geostatistics, 36 December, The Woodlands, TX.

Paul B. Cravens, P. E. , J. Buckley, N. Baker, J. Kingston, C. D. Smith, L. Rottinghaus and T. Malik, Emergency Response Planning for Power Generation Facilities Using the Integrated Contingency Plan, presented at Power-Gen International, Orlando, Florida, November 2000.

Deeds, N. E. , G. A. Pope, and D. C. McKinney, 2000. Laboratory Characterization of NAPL/Tracer Interaction in Support of a Vadose Zone Partitioning Interwell Tracer Test. Journal of Contaminant Hydrology, 41, pp. 193-204.

Mishra, S. and V. A. Kelley, 1999.  A New Hybrid Probabilistic Methodology for Health Risk Assessments, presented at Society for Risk Analysis Annual Meeting, Atlanta, GA., December 8, 1999.

Deeds, N. E. , G. A. Pope, and D. C. McKinney, 1999. Vadose Zone Characterization at a Contaminated Field Site Using Partitioning Interwell Tracer Technology. Environmental Science and Technology, 33(16), pp. 2745-2751.

Erskine, DW, KJ Laudon andCO Sealy. 1999. Degradation of groundwater quality caused by surface reclamation of open pit mines, Gas Hills, Wyoming. Proceedings of the SME Annual Meeting; 1999 Mar 1-3; Denver CO.

Ruskauff, G. J. , and J. O. Rumbaugh. 1999. Comparison of capture zone uncertainty from particle tracking and solute transport approaches. Presented at Model CARE'99, Zurich, Switzerland.

Dwarakanath, V., N. E. Deeds, and G. A. Pope, 1999. Analysis of Partitioning Interwell Tracer Tests. Environmental Science & Technology, 33(21) pp. 3829-3836.

Deeds, N. E., G. A. Pope, D. C. McKinney, and G. A. Whitley, 1999. Difluoromethane as a Partitioning Tracer to Estimate Vadose Water Saturations. ASCE Journal of Environmental Engineering, 125(7), pp. 630-633.

Whitley, G. A. , D. C. McKinney, G. A. Pope, B. A. Rouse, and N. E. Deeds, 1999. Contaminated Vadose Zone Characterization Using Partitioning Gas Tracers. ASCE Journal of Environmental Engineering, 125(6), pp. 574-582.

Helmig, R.,  P. Bastien, H. Class, J. Ewing, R. Hinkelmann, R. Huber, H. Jakobs, H. Sheta. 1998. Architecture of the modular program system MUFTE-UG for simulating multiphase flow and transport processes in heterogeneous porous media. Mathematische Geologie, 2:12331.

Rumbaugh, J. O., and G. J. Ruskauff. 1998. A practical, user-friendly interface for Monte Carlo simulation with MODFLOW. In Proceedings of MODFLOW'98 Conference, Colorado School of Mines, Golden, CO.

Allan, J., J. Ewing, R. Helmig, and J. Braun. 1998. Scale effects in multiphase flow modeling. In Volume C1-2G of Nonaqueous-Phase Liquids: Remediation of Chlorinated and Recalcitrant Compounds, D. Wickramanayake and R. E. Hinchee, editors. Columbus, OH: Battelle Press.

Erskine, D.W., C.L. Yancey, E.P. Lawrence and C.O. Sealy. 1998. Natural CO2 produced acidity in the vicinity of a sulfide ore deposit: Wilson Springs Mine, Hot Springs, Arkansas. In: Tailings and Minewaste '98: Proceedings of the Fifth International Conference on Tailings and Mine Waste; 1998 Jan.; Ft. Collins, CO. Rotterdam: A. A. Balkema. p. 621-29.

Lawrence, E.P., D.W. Erskine and C.O. Sealy. 1998. Case study: groundwater evaluation of the Wilson Springs vanadium mine site, Hot Springs, Arkansas. In: Tailings and Minewaste '98: Proceedings of the Fifth International Conference on Tailings and Mine Waste;1998 Jan. ; Ft. Collins, CO. Rotterdam: A. A. Balkema. p. 611, 620.

Ruskauff, G. J. 1998. MonteCarlo simulation with MODFLOW: Two case studies. In Proceedings of  MODFLOW'98 Conference, Colorado School of Mines, Golden, CO.

Grisak, G. E. and T. B. Johnson, 1998. Use of Modeling in Environmental Cases; Proceedings of the 10th Annual Environmental Superconference, Austin, Texas, Aug. 6-7. (Invited Paper)

Ardito, C. P., M. Fort, J. E. Studer. 1997. Ground water impacts caused by in-well vapor transport. Presented at Technical Information Exchange Workshop, Department of Energy, Idaho Falls, ID.

Ruskauff, G. J., 1997. Numerical inversion of a two-phase hydraulic test. Presented at the Society for Industrial and Applied Mathemathetics (SIAM) 1997 Computational Issues in the Geosciences Meeting, Albuquerque, NM.

McKenna, S. A. , L. C. Meigs, S. J. Altman, and T. L. Jones. 1997. Evaluation of the effects of heterogeneity and matrix diffusion on tracer breakthrough curve tailing. Presentation at the Geological Society of America Annual Meeting, October, Salt Lake City, UT.

Jin, M. , G. W. Butler, R. E. Jackson, P. E. Mariner, J. F. Pickens, G. A. Pope, C. L. Brown, and D. C. McKinney, 1997. Sensitivity Models and Design Protocol for Partitioning Tracer Tests in Alluvial Aquifers. Groundwater, Vol. 35, No. 6, pp. 964-972.

Roberts, R. M. , G. J. Ruskauff, and J. D. Avis. 1996. A Generalized method for analyzing well tests incomplex flow systems, SPE 36023. Presented at the 1996 Petroleum Computer Conference, Dallas, TX.

Ruskauff, G. J. 1996. Numerical well test interpretation. Presented at the 1996 Four Corners Oil and Gas Conference, Farmington, NM.

Illangasekare, T. H. , J. E. Ewing, and K. O. Pytte. 1996. Process upscaling of non-aqueous-phase liquid behavior inheterogeneous aquifers. In Non-aqueous-phase Liquids (NAPLs) in Subsurface Environment:Assessment and Remediation. New York: ASCE.

Jordan, D. L. , R. J. MacKinnon, and T. N. Blandford. 1996. Source term analysis for a RCRA mixed waste disposal facility. In Proceedings of the International Topical Meeting on Nuclear and Hazardous Waste Management Spectrum '96, 1823 August, Seattle, WA.

Ruskauff, G. J. , and J. O. Rumbaugh III, 1996. Incorporating ground water flow direction and gradient into flow model calibration. In Proceedings of 1996 ModelCARE, Golden, CO.

Ruskauff, G. J. , 1996. Effect of interblock transmissivity computation method on probabilistic travel times. In Poster Session Proceedings of 1996 ModelCARE, Golden, CO.

Groffman, AR and D Erskine. 1996. The distribution of contaminants in groundwater at the Slick Rock and Naturita, Colorado uranium mill tailings sites. In: W. R. Lund and L. H. Goodwin, eds. Geology and Resources of the Paradox Basin: Utah Geological Association Guidebook 25. p. 363-75.

Ardito, C. P. , D. M. Peterson, T. Martorana, R. G. Knowlton, R. E. Fate. 1995. Decision support tools for site characterization. Presented at Hazardous Waste Management Society, Annual Conference, Albuquerque, NM.

Sengebush, R. M. and K. C. Smith. 1995.  Transition from traditional to low-flow sampling methods. Proceedings of Environmental Restoration 1995 Conference, Denver, Colorado.

RamaRao, B. S. , A. M. Lavenue, J. F. Pickens, G. deMarsily, and M. G. Marietta, 1995. Stochastic Inverse Flow Modeling with Pilot Point Methodology. Abstract in Supplement to EOS Transactions, American GeophysicalUnion, Vol. 76, No. 17, p. S146. Presented at AGU Spring Meeting, Baltimore, Maryland, May 30 - June 2.

Ruskauff, G. J. , 1995. Geostatistical analysis of the hydraulic conductivity of the Upper Santa FeGroup, Albuquerque Basin, New Mexico. In Subsurface Fluid-Flow (Ground-Waterand Vadose Zone) Modeling, ASTM STP 1288, Joseph D. Ritchey and James O. Rumbaugh, editors. Philadelphia: American Society for Testing and Materials.

Okeson, S. , T. H. Illangasekare, D. C. Szlag, and J. E. Ewing. 1995. Modeling of dissolutiontransport of non-aqueous-phase liquid wastes in heterogeneous aquifers. In Proceedings of Tenth Annual Conference on Hazardous Waste Research. Great Plains/Rocky Mountain Hazardous Substance Research Center, Kansas StateUniversity, Manhattan, KS.

Butler, G. W., R. E. Jackson, J. F. Pickens, and G. A. Pope, 1995. An Interwell Solubilization Test for Characterization of NAPL Zones. American Chemical Society, ACS Symposium Series 594, Surfactant-Enhanced Subsurface Remediation: Emerging Technologies, Chapter15, pp. 201-215.

Ardito, C. P., T. A. Duval, and D. W. Reaber. 1994. Characterizing a DNAPL site through real-time analysisof vapors. STP 1261, Proceeding of the International Symposium on Volatile Organic Compounds in the Environment. ASTM Committee E-47 on Biological Effectsand Environmental Fate.

Loew, S., V. A. Kelley, and S. Vomvoris, 1994. Hydraulic Borehole Characterization through the Application of  Moment Methods to Fluid Conductivity Logs. Journal of Applied Geophysics, 31, pp. 117-131.

Ruskauff, G. J. , 1994. Amethodology for performing Monte Carlo analysis with MODFLOW and MODPATH. In Proceedings of the 1994 IGWMC Ground-Water Modeling Conference, Denver, CO.

Saulnier, G. J. and Grisak, G. E., 1994. Site Characterization of a RCRA Hazardous Waste Landfill on the Stockton Plateau. American Institute of Hydrology, Annual Meeting, 1994, Toxic Substances and the Hydrologic Environment.

Peterson, D. M., R. Cox, C. D. Updegraff, T. A. Duval, and C. Ardito. 1993. A stochastic decision support system for locating gas-sampling boreholes in the vadose zone. Presented at the Rocky Mountain Ground Water Conference, Albuquerque, NM.

Duval, Thomas A., C. Ardito and D. Reaber. 1993. Characterizing a DNAPL source in the unsaturated zone via real-time analysis of soil vapor. Presented at Fourth National Technology Information Exchange (TIE)Workshop, Knoxville, TN.

Peterson, D. M., R. Cox, C. D. Updegraff, T. A. Duval, C. P. Ardito, D. Reichman, and R. G. Knowlton, 1993. A stochasticdecision support system for optimally characterizing vadose zone gas plumes. In Proceedings of the American Geophysical Union Hydrology Days, Spring.

Duval, T. A., C. P. Ardito, and D. W. Reaber. 1993. Characterizing a DNAPL source in the unsaturated zonevia real-time analysis of soil vapor. In Proceedings of the Fourth National Technology Information Exchange Workshop, Department of Energy, Spring, Knoxville, TN.

Loew, S., V. A. Kelley, and S. Vomvoris, 1993. Hydraulic Borehole Characterization through the Application of  Moment Methods to Fluid Conductivity Logs, Presented at Congres Geophysique et Environment, Lausanne, Switzerland, April 1993. Paper published in special issue of Journal of Geophysics.

Lavenue, Marsh, and JohnPickens, 1993, Application of the Adjoint-Sensitivity Technique for the Guidance of  Efficient Ground Water Model Calibration, presented at Fifth International Conference on Solving Ground Water Problems with Models, Dallas, Texas, February 11-13, 1993.

Meinardus, H. W., N. A. Jasek, G. E. Grisak, and G. J. Saulnier, Jr. , 1993. Offset Shotholes in West Texas: Evidence for Neotectonics, Stress Relief, or Blasting Phenomenon? Bulletin of  the Association of  Engineering Geologists, Vol. XXX, No. 4, 1993, pp 427-442.

Guyonnet, D., J. M. Lavanchy, S. Vomvoris, S. Loew, V.  Kelley, and B. Frieg, 1993. Evidence from Crosshole Pressure and Fluid Logging Tests of a Preferential Pathway for Flowin Crystalline Rock. Presented at the 1993 XXIV IAH Congress in Oslo, Norway.

Jackson, R. E., J. F. Pickens, and A. Haug, 1993. The DNAPL Problem: Locating, Characterizing, and Remediating DNAPL Zones in Ground-Water Systems. Paper presented at Fifth Annual Environmental Management and Technology Conference/Southwest, Dallas, Texas. Published in Proceedings Volume, pp. 352-374.

Field, A. A., and G. J. Ruskauff. 1993. Mapping preferential flow paths using multiple indicator kriging of both quantitative and qualitative information. Abstract in EOS, Transactions of  the American Geophysical Union Winter Meeting, 6-10 December, San Francisco, CA.

Ruskauff, G. J., and A. F. Field. 1993. Preliminary comparison of parametric and nonparametric conditional simulation methods. In Proceedings of the 1993 IGWMC Ground-Water Modeling Conference, Golden, CO.

Senger, R. K., F. J. Lucia, C. Kerans, M. A. Ferris, and G. E. Fogg, 1993. Dominant control of reservoir-flowbehavior in carbonate reservoirs as determined from outcrop studies, in Linville, R. (ed. ) Reservoir Characterization III, Pennwell Publishing Co. , p. 106-150.

Senger, R. K., 1993. Paleohydrology of variable-density flow systems in mature sedimentary basins - example of the Palo Duro Basin, Texas: Journal of Hydrology, v. 151, p. 109-145.

Grisak, G. E., N. Jasek, G. J. Saulnier, and F. J. Pearson, Jr. , 1992. Geologic and Hydrogeologic Characteristics of a Commercial Landfill in Carbonate Terrain in Trans-Pecos Texas. Proceedings of the 26th Annual Meeting of the South-Central Section of the Geological Society of America and Associated Societies, Houston, Texas, February 24-25.

Haug, A., and G. E. Grisak, 1992. Numerical Simulation of Variable Density Contaminant Transport over TenOrders of Magnitude. Proceedings of the Interdisciplinary Approaches in Hydrology and Hydrogeology Conference, American Institute of Hydrogeology, October17-22, pp. 195-208.

Haug, A., G. E. Grisak, and F. G. Wolf, 1992. Dynamic Coupling - A New Tool for Three-Dimensional Flow and Transport Simulations. Proceedings of the Fifth International Solving Ground-Water Problems with Models Conference, NGWA, February 11-13, pp. 71-84.

Field, A. F., and G. J. Ruskauff. 1992. Ground-water model parameter zonation using indicator geostatistics. In Proceedings of GeoTech '92 Geocomputing Conference, Denver, CO.

Mattson, E. D., E. R. Lingren, W. F. Booher, and C. P. Ardito. 1992. Conceptual model selectionof voc migration using soil gas collected from existing ground water monitoring wells. In Proceedings of the International Symposium on Environmental Contamination in Central and Eastern Europe, 1216 October, Budapest, Hungary.

Kelley, V. A., S. Loew andS. Vomvoris, 1991. Determination of Fracture Connections in a Granite from a Pilot Crosshole Fluid Logging Test. Published in AGU 1991 Fall Meeting Abstracts, Presented in San Francisco, December 13, 1991.

Grisak, G. E. , A. Haug, F. J. Pearson, Jr. , K. Slaughter, and W. V. Walls, 1991. Aquifer Protection Characteristics of a Commercial Landfill in Carbonate Terrain in Trans-Pecos Texas. Invited paper presented at Seminario International Sobre Aguas Subterrneas, La Universidad Autnoma de San Luis Potos, Mexico, September.

Ruskauff, G. J., 1991. Geostatistical aquifer characterization for use in flow and transport modeling. Presented at the 1991 AGWSE Conference on Innovative Ground-Water Technologies for the 90s.

Senger R. K., and G. E. Fogg, 1990. Stream Functions and Equivalent Fresh-Water Heads for Modeling Regional Flow of Variable Density Ground Water, 1. review of theory and verification: Water ResourcesResearch, v. 26, no. 9, p. 2089-2096.

 Senger R. K., and G. E. Fogg, 1990. Stream Functions and Equivalent Fresh-Water Heads for Modeling Regional Flow of Variable Density Ground Water, 2. application and implications for modeling strategy: Water Resources Research, v. 26, no. 9, p. 2097-2106.

 Senger R. K., 1990. Regional Characterization ofVariable-Density Fluid Flow in Sedimentary Basins: Implications on Model Interpretations. In Fifth Annual Canadian-American Conference on Hydrogeology - Parameter Identification and Estimation for Aquifer and Reservoir Characterization: The Alberta Research Council and National Water Well Association, 20 p.

Haug, A., R. H. Petrini, G. E. Grisak and K. Klahsen, 1990. Synthetic Semivariograms - A NovelApproach to Assessing Positions and Spacing of Ground-Water Monitoring Wells in Minimizing Risk to the Hydrologic Environment, A. Zaporozec (Editor), Kendall/Hunt Publishing Company, Dubuque, Iowa, pp. 224-233.

Haug, A., R. H. Petrini, G. E. Grisak, and K. Klahsen, 1990. Geostatistical Assessment of Numerically Simulated Ground-water Flow in the Upper Chicot Aquifer Near Port Arthur, Texas. Proceedings of the international conference on Calibration and Reliability in Ground-water Modeling, K. Kovar, Editor, IAHS Press, Oxfordshire(G. B. ), IAHS Publication #195, pp. 427-437.

Haug A., R. H. Petrini, G. E. Grisak, and K. Klahsen, 1989. Application of Geostatistical Methods to Assess Positions and Spacing of Ground-Water Monitoring Wells. Proceedings of the Petroleum Hydrocarbons and Organic Chemicals in Ground Water Conference, NWWA, November 15-17, 1989, Houston, pp. 159-174.

Petrini, R. H., A. Haug, G. E. Grisak, and K. Klahsen, 1989. Application of Geostatistical Methods to Assess Direction, Magnitude, and Uncertainty of Ground Water Flow. Proceedings of the Petroleum Hydro-carbons and Organic Chemicals in Ground Water conference, NWWA, November 15-17, 1989, Houston, pp. 535-548.

Saulnier, Jr., G. J., T. L. Cauffman, V. A. Kelley, J. F. Pickens, and W. A. Stensrud. 1989. Practical aspects of design and fieldimplementation of a convergent-flow tracer test. Poster Presentation at the Association of Ground Water Scientists and Engineers Conference on Tracers inHydrology: Principles, Problems, and Practical Applications, 31 October - 1 November, Houston, TX.

Haug, A., R. H. Petrini, G. E. Grisak, and K. Klahsen, 1989. The Hydrogeological Properties of the Gulf Coast Upper Chicot Aquifer Near Port Arthur, Texas. Proceedings of the New Field Techniques for Quantifying the Physical and Chemical Properties of Heterogeneous Aquifers conference, NWWA, March 20-23, 1989, Dallas, pp. 629-650.

Lavenue, Marsh, R. W. Andrews, and B. S. RamaRao, 1989. Groundwater Travel Time Uncertainty AnalysisUsing Sensitivity Derivatives, Water Resources Research, 25(7);15511566.

Jordan, D. L., and M. Reiter. 1989. Using regional heat-flow data to delineate vertical ground waterflow patterns in southeastern New Mexico. In New Mexico Geological SocietyAnnual Spring Meeting, p. 43.

Grisak, G. E., J. D. Avis, D. W. Granger, and W. V. Walls, 1988. Loosed from the Shackles of Slug Tests; or Comprehensive Hydraulic Testing of Small Diameter Monitoring Wells. Hazmat West88, November, (Invited Paper).

Grogan, A. T., V. W. Pinczewski, G. J. Ruskauff, and F. M. Orr, Jr. 1988. Diffusion of CO2 at reservoir conditions: Models and measurements. SPE Report No. 14897SPE prepared forReservoir Engineering.

Senger, R. K. and G. E. Fogg, 1987. Regional underpressuring in deep brine aquifers, PaloDuro Basin, Texas, 1, effects of hydrostratigraphy and topography: Water Resources Research, v. 23, no. 8, p. 1481-1493.

Senger, R. K., C. W. Kreitler, and G. E. Fogg, 1987. Regional under pressuring in deep brine aquifers, PaloDuro Basin, Texas, 2, the effect of Cenozoic basin development: Water Resources Research, v. 23, no. 8, p. 1494-1504.

Pickens, J. F., G. E. Grisak, J. D. Avisand D. W. Belanger, 1987. Analysis of Borehole Hydraulic Tests in DeepBoreholes: Principles, Model Development and Applications. Water Resources Research, Vol. 23, No. 7, pp. 1341-1375.

Kelley, V. A., J. F. Pickens, M. Reevesand R. L. Beauheim, 1987. Double Porosity Tracer Test Analysis for Interpretation of  the Fracture Characteristics of a Dolomite Formation. In: Proceedings of Solving Ground Water Problems with Models Conference, Vol. 1, pp. 147 169; presented February 10-12, Denver, Colorado.

Beauheim R. L. and J. F. Pickens, 1986. Applicability of  the Pressure Derivative to Hydraulic Test Analysis. Abstract in EOS Transactions, American Geophysical Union, Vol. 67, No. 16, p. 276; presented at AGU Spring Meeting, Baltimore, Maryland, 19-22 May.

Lavenue, A. M., and Domenico, P. A. , 1986. A Preliminary Assessment of the Regional Dispersivity of Selected Basalt Flows at the Hanford Site, Washington, U. S. A. , Journal of Hydrology, (85);151-167.

Beauheim, R. L. and J. F. Pickens, 1985. Effects of  Borehole History on Well-test Analysis. Abstract in EOS Transactions, AmericanGeophysical Union, Vol. 66, No. 46, p. 895; presented at AGU Fall Meeting, San Francisco, 9-11 December.

Kewen, T., G. E. Grisak, L. T. Callow, and M. J. Riddle, 1985. Hydrogeologic Evaluations Associated with Alberta's First Sour Gas Plant Decommissioning. IAH conference proceedings, Calgary, Alberta, June, 25 p.

Grisak, G. E., J. F. Pickens, and J. D. Avis, 1985. Principles of Hydrogeologic Investigations at Depth in Crystalline Rock. Paper presented at International Association of Hydrogeologists, 17th International Congress, Tucson, Arizona. Published in IAH Memoirs, Vol. XVII, Part 1 Proceedings, Hydrogeology of Rocks of Low Permeability, pp. 52-71.

Grisak, G. E., 1983. Ground Water Monitoring at Hazardous Waste Sites. Paper presented at the 5th NationalConference on Waste Management in Canada, Oct. 12-14, Quebec City, Quebec.

Grisak, G. E., 1982. Ground Water Monitoring Instrumentation. Paper presented at 2nd National Symposium on Aquifer Restoration and Ground Water Monitoring, NWWA, U. S. EPA, May 26-28, 1982.

Grisak, G. E. and J. F. Pickens, 1982. Recent Advances in Hydrogeologic Field Instrumentation and Techniques. Presented at the Second National Symposium on Aquifer Restoration and Ground-water Monitoring sponsored by the National Water Well Association and the U. S. EPA, Columbus, Ohio, 25-28 May.

Grisak, G. E. and J. F. Pickens, 1982. Ground Water Tracers in Hydrogeologic Field Investigations. Presented at  the Second National Hydrogeological Conference sponsored by International Association of Hydrogeologists, Winnipeg, Manitoba, 4-5 February.

Grisak, G. E. and J. F. Pickens, 1982. Recent Advances in Hydrogeologic Field Instrumentation and Techniques. Presented at the Second National Symposium on Aquifer Restoration and Ground Water Monitoring, sponsored by the National Water Well Association and the U. S. EPA, Columbus, Ohio, 25-28 May.

Pickens J. F.,  J. A Cherry, R. M. Coupland, G. E. Grisak, W. F. Merritt and B. A. Risto, 1981. A Multilevel Device for Ground-water Sampling. Ground Water Monitoring Review, Vol. 1, No. 1, p. 48-51.

Pickens, J. F., R. E. Jackson, K. J. Inch and W. F. Merritt, 1981. Measurement of Distribution CoefficientsUsing a Radial Injection Dual-tracer Test. Water Resources Research, Vol. 17, No. 3, p. 529-544.

Pickens, J. F., and G. E. Grisak, 1981. Scale-Dependent Dispersion in a Stratified Granular Aquifer. Water ResourcesResearch, Vol. 17, No. 4, p. 1191-1211.

Grisak, G. E. and J. F. Pickens, 1981. Ananalytical solution for solute transport through fractured media with matrix diffusion. Journal of Hydrology, Vol. 52, No. , p. 47 57.

Grisak, G. E. and J. F. Pickens, 1980. Solute Transport Through Fractured Media. Presented at the 72nd Annual Meeting of American Society of Agronomy, Crop Science Society of America and SoilScience Society of America, Detroit, Michigan, Nov. 30-Dec. 5.

Grisak, G. E., 1980. SoluteTracer Tests in Fractured Media. In: Third Invitational Well Testing Symposium, 26-28 March, 1980, sponsored by U. S. Dept. of Energy through the Lawrence Berkeley Laboratory, University of California, LBL-12076, p. 90-93.

Grisak, G. E., J. F. Pickens and J. A. Cherry, 1980. Solute Transport Through Fractured Media: 2. Column Study of Fractured Till. Water Resources Research, Vol. 16, No. 4, p. 731-739.

Lee, D. R., J. A. Cherry and J. F. Pickens, 1980. Groundwater Transport of a Salt Tracer Through a Sandy Lakebed. Limnology and Oceanography, Vol. 25, No. 1, p. 45-61.

Pickens, J. F. and R. W. Gillham, 1980. Finite element Analysis of Solute Transport Under Hysteretic Unsaturated Flow Conditions. Water Resources Research, Vol. 16, No. 6, p. 10711078.

Grisak, G. E., J. F. Pickens, D. W. Williams, and J. A. Cherry, 1979. Solute Transport Through Fractured Till: A Column Study. Geol. Assoc. Can. Annual Meeting, Quebec City, 23-25 May, 1979, Program with Abstracts, Vol. 4, p. 54.

Davison, C. C., G. E. Grisak and D. W. Williams, 1979. Field Permeability and Hydraulic Potential Measurements in Crystalline Rock and Solute Transport Through Finely Fractured Media. In: Low-flow, Low Permeability Measurements in Largely ImpermeableRocks: Proceedings of the NEA/IAEA Workshop, Paris, 19-21 March, pp. 139-155.

Pickens, J. F. and G. E. Grisak, 1979. Replyto discussion by J. A. Vonhof, K. U. Weyer and S. Whitaker of "A Multilevel Device for Ground-Water Sampling and Piezometric Monitoring". GroundWater, Vol. 17, No. 4, pp. 393-397.

Averett, R., G. Feder, G. E. Grisak, D. H. Lennox, M. Miller, S. Stan, A. Schneider and O. J. Taylor, 1979. International Popular River Water Quality Study, Appendix B: Ground Water Quantity and Quality, Prepared for the Intl. Popular River Water Quality Board, International Joint Commission, 80 p.

Grisak, G. E., R. E. Jackson, and J. F. Pickens, 1979. Monitoring Ground-Water Quality: The Technical Difficulties. In: Establishment of Water Quality Monitoring Programs, Ed. by L. G. Everett andK. D. Schmidt. Proc. American Water Resources Association Symp. , 12-14 June1978, San Francisco, p. 210-232.

Pickens, J. F., R. W. Gillhamand D. R. Cameron, 1979. Finite Element Analysis of the Transport of Water and Solutes in Tile Drained Soils. Journal of Hydrology, Vol. 40, No. 3/4, p. 243364.

Pickens, J. F., 1978. The Effect of Aquifer Stratification on the Determination of Dispersivity. Presented at Joint Annual Meeting of Geological Assoc. Can. /Geological Soc. of Amer. , Toronto, 23-26 October, Abstracts with Programs, p. 462.

Lee, D. R., J. F. Pickens, J. A. Cherry, and R. Nicholson, 1978. Transport of a Conservative Solute to a Lake by Diffuse Ground Water Flow. Presented at 41st Annual Meeting of American Society of Limnology and Oceanography, 19-22 June, 1978, Victoria, British Columbia.

Pickens, J. F., G. B. Allison, and W. F. Merritt, 1978. Transport of  Labelled Pulses of Water to theUnsaturated-Saturated Zone Interface. Abstract in EOS Transactions, American Geophysical Union, Vol. 59, No. 4, p. 281; presented at AGU Spring Mtg. , Miami Beach, Florida, 17-21 April.

Pickens, J. F., J. A. Cherry, G. E. Grisak, W. F. Merrittand B. A. Risto, 1978. A Multilevel Device for Ground-Water Sampling and Piezometric Monitoring. Ground Water, Vol. 16, No. 5, p. 322-327.

Pickens, J. F., J. A. Cherry, R. W. Gillham, and W. F. Merritt, 1978. Field Studies of Dispersion in a Shallow Sandy Aquifer. Proc. Invitational Well Testing Symposium, sponsored by the U. S. Dept. of Energy through the Lawrence Berkeley Laboratory, Berkeley, California, 19-21 October 1977, LBL-7027, p. 55-62.

Grisak, G. E., B. Rehm, andC. C. Davison, 1977. Field Dispersivity Measurements in a Shallow Gravel Aquifer. Geol. Assoc. Can. , Min. Assoc. Can., Program and Abstracts, Vancouver, April 25-27.

Davison, C. C. and G. E. Grisak, 1977. A Field and Laboratory Investigation of the Groundwater Contamination Potential of a Sanitary Landfill Site. Geol. Assoc. Can. , Min. Assoc. Can. , Program and Abstracts, Vancouver, April 25-27.

Grisak, G. E., W. F. Merrittand D. W. Williams, 1977. A Fluoride Borehole Dilution Apparatus for Ground-water Velocity Measurements. Canadian Geotechnical Journal, Vol. 14, No. 4, p. 554-561.

Pickens, J. F., W. F. Merritt, and J. A. Cherry, 1976. Field Determination of the Physical Contaminant Transport Parameters in a Sandy Aquifer. In: Nuclear Techniques in Groundwater Pollution Research, p. 239-265, Proc. IAEA Advisory Group Mtg. , Cracow, Poland, 6-9 December 1976.

Grisak, G. E. , J. A. Cherry, J. A. Von Hof and J. P. Blumele, 1976. Hydrogeologic and Hydrochemical Properties of Fractured Till in the Interior Plains Region. In: Glacial Till - An Interdisciplinary Study, Royal Society of Canada, Special Publication No. 12, Ed. by R. F. Legget, p. 304-335.

Grisak, G. E. and W. F. Merritt, 1976. Ground-Water Velocity Measurements by Point-Dilution Using a Non-Radioactive Tracer. Geol. Assoc. Can. , Annual Meeting, Edmonton, Program with Abstracts, Vol. 1, p. 54.

Merritt, W. F., R. E. Jackson, and J. F. Pickens, 1975. Migration of 90Sr and 137Cs in a Shallow GroundwaterFlow System. Presented at Annual Meeting, Geol. Assoc. Can. , Waterloo, Ontario, Canada, May 1975, Abstract Vol. , p. 821-822.

Cherry, J. A., R. W. Gillham and J. F. Pickens, 1975. Contaminant Hydrogeology: Part 1. Physical Processes. Geoscience Canada, Vol. 2, No. 2, p. 76-84.

Grisak, G. E., 1975. The Fracture Porosity of Glacial Till. Canadian Journal of Earth Sciences, Vol. 12, No. 3, pp. 513-516.

Grisak, G. E. and J. A. Cherry, 1975. Hydrologic Response of Fractured Till and Clay Confining aShallow Aquifer. Canadian Geotechnical Journal, Vol. XII, No. 1, p. 23-43.