Ophori, D.U. and R.N. Farvolden. 1985. A hydraulic trap for preventing collector well contamination: A case study. Ground Water, Vol. 23, No. 5, pp. 600-610 (Also published in “A Practical Manual on Groundwater Modelling” by F.F. Akindunni and E.O. FrindBritish Commonwealth Science Council, Series No. CSC(93)WMR-16. Technical Paper 292, pp. 141-151.
Ophori, D.U. and J. Tóth. 1989. Patterns of groundwater chemistry, Ross Creek Basin, Alberta, Canada. Ground Water, Vol. 27, No. 1, pp. 20-26.
Ophori, D.U. and J. Tóth. 1989. Characterization of ground-water flow by field mapping and numerical simulation, Ross Creek Basin, Alberta, Canada. Ground Water,Vol. 27, No. 2, pp. 193-201.
Ophori, D.U. and J. Tóth. 1990. Influence of the location of production wells in unconfined groundwater basins: An analysis by numerical simulation. Canadian Journal of Earth Sciences , Vol. 27, No. 5, pp. 657-668.
Ophori, D.U. and J. Tóth. 1990. Relationships in regional groundwater discharge to streams: An analysis by numerical simulation. Journal of Hydrology, Vol. 119, pp. 215-244.
Ophori, D.U. 1991. On management of groundwater in Ross Creek Basin, Alberta, Canada. Journal of Water Resources Planning and Management, American Society of Civil Engineers (ASCE) , Vol. 117, No. 2, pp. 195-216.
Akpokodje, E. G . Ophori, D.U., Enebeli, V. V. & Nwadibia, E. O ., 1991. Anomalous response of groundwater level to seasonal rainfall variations in parts of Imo state: A preliminary Study. J. Min. & Geol., Vol. 4. No. 1, pp. 55-60.
Ophori, D.U. 1992. The stability of a basin under groundwater development: A numerical experiment. Modern Geology, Vol. 16, pp. 317-335.
Ophori, D.U. 1998. Flow of groundwater with variable density and viscosity, Atikokan Research Area, Canada. Hydrogeology Journal, Vol. 6, No. 2, pp. 193-203.
Ophori, D.U . 1998. The significance of viscosity in density-dependent flow of groundwater. Journal of Hydrology, Vol. 204, pp. 261-270.
Ophori, D.U ., T. Chan and F.W. Stanchell. 1998. Hydrologic response to pumping and contaminant advection in a fractured rock environment. Journal of the American Water Resources Association , Vol. 34, No. 1, pp. 57-72.
Ophori, D.U. 1999. Constraining permeabilities in a large-scale groundwater system through model calibration. Jour. of Hydrology, Vol. 224, pp. 1-20.
Ophori, D.U. 2000. Simulating large scale groundwater flow for waste disposal purposes. F öldtaniKozlony, Vol. 130, No. 2, pp. 263-273.
Ophori, D.U. and B. Maharjan. 2000. First approximations of soil moisture retentioncurves using the filter-paper method, Long Island, New York Hydrological Processes , Vol. 14, pp. 1131-1138 .
Ophori, D.U. and M. McGill. 2000. Alternative conceptual models of groundwater flowand contaminant transport, Northeastern New Jersey. Northeastern Geology & Environmental Science , Vol. 22, No. 2, pp. 130-141.
Davison, C.C., A. Brown, M. Gascoyne, D. Stevenson and D.U. Ophori. 2000. Understanding large scale groundwater flow in fractured crystalline rocks to aid in repository siting. Hydrogéologie , n o 2, pp. 3-11.
Rodriquez, E. K.A. McGuinness and D.U. Ophori. 2003. Reductive dechlorination ofchlorinated solvents in groundwater: A Case Study. Am. Chem. Soc. Div. Fuel. Chem. Prepr. Vol. 48, No.2, pp.925-926.
Rodriquez, E. K.A. McGuinness and D.U. Ophori. 2004. A field evaluation of enhanced reductive dechlorination of chlorinated solvents in groundwater, New YorkMetropolitan Area. DOI 10.1007/s00254-003-0920-0 Environmental Geology,Vol. 45, pp. 623-632.
Ophori, D.U. 2004. A simulation of large-scale groundwater flow and travel time in afractured rock environment for waste disposal purposes. Hydrological Processes,Vol. 18, pp. 1579-1593.
Ophori, D.U. and R. Riberdy. 2005. An analysis of groundwater flow at a proposedwetland mitigation site, Central New Jersey. Northeastern Geology &Environmental Sciences , Vol. 27, No. 2, pp. 123-135.
Ophori, D.U . 2005. An analysis of groundwater movement for environmental waste control. In URBAN DIMENSIONS OF ENVIRONMENTAL CHANGE Science, Exposures, Policies and Technologies, May 25-28, 2004, Shanghai, China: (Eds) Feng, H., L. Yu and W. Solecki, Science Press USA Inc, Monmouth Junction, New Jersey, pp. 59-66.
Ophori, D.U. 2007. A simulation of large-scale groundwater flow in the Niger Delta, Nigeria. Environmental Geosciences, Vol. 14, No. 4, pp. 1-15.
Ophori, D.U., M. Gorring, K. Olsen, J. Hope and E. Orhuah. 2007. A preliminary analysis of groundwater chemistry in shallow boreholes, Ughelli, Nigeria. Journal of Environmental Hydrology , Vol. 15, Paper 13, pp. 1-8.
Mujtaba, G., Z. Ahmed and D.U. Ophori. 2007. Management of groundwater resources in Bari Doab, Pakistan, using a numerical groundwater flow model. Journal of Environmental Hydrology , Vol. 15, Paper 31, pp. 1-14.
Xeflide, S. K. and D.U. Ophori. 2007. Characterization and frequency analysis of one day annual maximum and two to five consecutive days’ maximum rainfall of Accra, Ghana. ARPN Journal of Engineering and Applied Sciences, Vol. 2, No. 5, pp. 27-31.
Yidana, S.M., D.U. Ophori and B. Obeng. 2007. Hydrochemical analysis of groundwater from the Keta Basin, Ghana. Journal of Environmental Hydrology, Vol. 15, Paper 23, pp. 1-11.
Yidana, S.M., D.U. Ophori and B. Banoeng-Yakubo. 2007. Irrigation water resource management for sustainable agriculture – The Ankobra Basin, Ghana. Journal of Irrigation and Drainage Engineering, American Society of Civil Engineers (ASCE), Vol. 133, No. 6, pp. 609-615 (also online as: DOI:10.1016/(ASCE)0733-9437(2007)133:6(609).
Xeflide, S. K. and D.U. Ophori. 2008. Return period analysis as a tool for urban flood prediction in the Accra Plains, Southern Ghana. Journal of Environmental Hydrology, Vol. 16, Paper 15, pp. 1-8.
Yidana, S.M., D.U. Ophori and B. Banoeng-Yakubo. 2008. A multivariate statistical analysis of surface water chemistry data – The Ankobra Basin, Ghana. Journal of Environmental Management , Vol. 86, pp. 80-87 (also online as: DOI:10.1016/j.jevnman.2006.11.023).
Yidana, S.M., D.U. Ophori and B. Banoeng-Yakubo. 2008. Hydrogeological and hydrochemical characterization of the Voltaian Basin: The Afram Plains Area, Ghana. Environmental Geology, Vol. 53, pp. 1213-1223. (also online as: DOI:10.1007/s00254-007-0710-1).
Yidana, S.M.., D.U. Ophori and B. Banoeng-Yakubo. 2008. Groundwater quality evaluation for productive uses – The Afram Plains Area, Ghana. Journal of Irrigation and Drainage Engineering, American Society of Civil Engineers (ASCE) , Vol. 134, No. 2, pp. 222-227.
Yidana, S.M., D.U. Ophori and B. Banoeng-Yakubo. 2008. Hydrochemical evaluation of the Volta Basin: The Afram Plains Area, Ghana . Journal of Environmental Management, Vol. 88. pp. 697-707 (also online as: DOI:10.1016/j.jevnman.2007.03.037).
Yidana, S.M. and D.U. Ophori. 2008. Groundwater resources management in the Afram Plains Area, Ghana. KSCEJournal of Civil Engineering, Vol. 12, No. 5, pp. 339-347.
Barry, F., D.U. Ophori, J. Hoffman and R. Canace. 2007. Groundwater flow and capture zone analysis of the Central Passaic River Basin, New Jersey. Environmental Geology (in press, already published online as: DOI:10.1007/s00254-008-1257-5).
Yidana, S.M. and D.U. Ophori. 2007. Groundwater availability in the shallow aquifers of the southern Voltaian System: A simulation and chemical analysis . Environmental Geology(in press, already published online as: DOI:10.1007/s00254-007-1114-y).
Ophori, D.U. 1985. Clay minerals and weathering in a glacial till. Proc. of the International Clay Conference , University of Port Harcourt, Nigeria, 5 pages.
Ophori, D.U. and R.N. Farvolden. 1985. Containment of contamination at an induced infiltration site (abstract). Proc. of the 2nd Annual Canadian/American Conference on Hydrogeology: Hazardous Wastes in Groundwater - A Soluble Dilema, Banff, Alberta, Canada, pp. 195.
Ophori, D.U. and J. Tóth. 1985. Regional groundwater flow and baseflow regularities (abstract). Proc. of the 5th Annual Hydrology Days, American Geophysical Union Front Range Branch, Fort Collins, Colorado.
Ophori, D.U. and J. Tóth, 1986. Petroleum Hydrogeology: A hydrogeological approach to petroleum exploration and basin analysis. Proc. of the 3rd Canadian/American Conference on Hydrogeology, Banff, Alberta, Canada, pp. 108-111.
Chan, T., D.U. Ophori and F.W. Stanchell. 1991. Sensitivity of advective contaminants to pumping near a hypothetical nuclear fuel waste disposal vault. Proc. of the International Association of Science and Technology for Development (IASTED) International Symposium on World Environment, Calgary, Alberta, pp. 125-129.
Ophori, D.U. and T. Chan. 1994. Simulation of 18O and 3H distributions in the Atikokan Research Area. Proc. of the 1994 Nuclear Simulation Symposium,October 12-14, 1994, Pembroke, Ontario, pp. 244-258.
Ophori, D.U. and T. Chan. 1995. Two-dimensional groundwater flow and advective solute transport in conceptual models of the Whiteshell Research Area. Proc. of Solutions ‘95, International Association of Hydrogeologists, Congress XXVI,June 4-10, 1995, Edmonton, Alberta, Canada, 6 Pages.
Stevenson, D.R., A. Brown, C.C. Davison, M. Gascoyne, R.G. McGregor, D.U. Ophori,N.W. Scheier, F.W. Stanchell, G.A. Thorne and D.K. Tomsons. 1995. A revised conceptual hydrogeological model of a crystalline rock environment, Whiteshell Research Area, southeastern Manitoba, Canada. Proc. of Solutions ‘95, International Association of Hydrogeologists, Congress XXVI, June 4-10, 1995, Edmonton, Alberta, Canada, 9 pages.
Davison, C.C., A. Brown, M. Gascoyne, D. Stevenson and D.U. Ophori. 1996. Understanding large scale groundwater flow to aid in repository siting. Proc. of the Canadian Nuclear Society (CNS) Conference , September, 1996, Winnipeg, Manitoba, Canada, 7 pages.
Ophori, D.U. and T. Chan. 1997. Calibration of a regional groundwater flow model using solute transport modeling (abstract). Abstract with Programs, GSA 32 nd Annual Meeting, Northeastern Section, March, 1997, King of Prussia, Pennsylvania, U.S.A., pp. 71.
Ophori, D.U. 1997. A numerical simulation analysis of viscosity in variable-density flow of groundwater (abstract). Abstract with Programs, GSA Annual Meeting,October 20-23, 1997, Salt Lake City, Utah, U.S.A., pp. A75.
Ophori, D.U. 1998. Preliminary selection of a hypothetical nuclear waste disposal site by simulating regional groundwater flow (abstract). Abstract with Programs, GSA 33 rd Annual Meeting, Northeastern Section, March 19-21, 1998, Portland, Maine, USA., Vol. 30, No. 1, pp. A65.
McGill, M. and Ophori, D.U. 1998. Alternative conceptual models of groundwater flow and contamination transport using computer simulation, Northeastern New Jersey (abstract). Abstract with Programs, New Jersey Section AWWA Spring Conference March 23-27, 1998, Atlantic City, New Jersey, U.S.A.
Ophori, D.U. 1998. Conceptual models of groundwater flow contaminant transport in Northeastern New Jersey (abstract). Abstract with Programs, New Jersey Science Consortium Symposium: A Wealth of Resources in New Jersey - Showcasing Research, March 30, 1998, Kean University, Union, New Jersey, U.S.A.
Ophori, D.U. and M. McGill. 1999. An evaluation of three alternative conceptual models of groundwater flow and advective transport using computer simulation, Upper Montclair, New Jersey (abstract). Abstract with Programs, GSA 34 th Annual Meeting, Northeastern Section, March 22-24, 1999, Providence, Rhode Island, U.S.A., p. A60.
Ophori, D.U. 1999. Simulating large scale groundwater flow for waste disposal purposes (abstract). Abstract with programs, The Geology of Today for Tomorrow – A Satellite Conference of the World Conference on Science, June 21-22, 1999, Budapest Hungary, p 60.
Ophori, D.U. 1999.Prospects of Petroleum Hydrogeology in the Niger Delta, Nigeria(abstract). Book of Abstracts, First International Conference on Science, Technology and Sustained Development, Dec. 27-29, 1999. Uyo, Nigeria, 1p.
Ophori, D.U. and B. Maharjan.1999. Estimating soil moisture retention curves using the filter-paper method (abstract). Book of Abstracts, First International Conference on Science, Technology and Sustained Development, Dec. 27-29, 1999. Uyo, Nigeria, 1p.
Ophori, D.U., B. Maharjan and M. Bender. 2000. Determination of soil moisture retention curves by the filter-paper method, Long Island, New York (abstract).Abstract with Programs, GSA 35 th Annual Meeting, Northeastern Section, March 13-15, 2000, New Brunswick, New Jersey, U.S.A., p. A60.
Schaffner, M. and D.U. Ophori. 2001. A preliminary laboratory analysis of regional groundwater flow (abstract). Abstract with Programs, GSA 36 th Annual Meeting, Northeastern Section, March 12-14, 2001, Burlington, Vermont, U.S.A., p. A35.
Maharjan, B. and Ophori, D.U. 2001. Simulation of groundwater flow to determine vulnerability to contamination, Long Island, New York (abstract). Abstract with Programs, New Jersey Section AWWA Spring Conference April 2-5, 2001, Atlantic City, New Jersey, U.S.A.
Schaffner, M, M. Kawada and Ophori, D.U. 2002. A laboratory and simulation analysis of regional groundwater flow. (abstract). Abstract with Programs, New Jersey Section AWWA Spring Conference March 19-22, 2002, Atlantic City, New Jersey, U.S.A.
Rodriguez, E., K.A. McGuinness and D.U. Ophori. 2003. Reductive dechlorination of chlorinated solvents in groundwater: A Case Study. (abstract). Abstract withPrograms , American Chemical Society, 226 th ACS National Meeting, September 7-11, 2003, New York, NY, USA, p. 40-TECH.
Riberdy, R. and D.U. Ophori. 2003. Analyzing groundwater flow to aid in wetland mitigation. (abstract). Abstract with Programs , The Meadowlands Symposium: A Scientific Symposium on the Hackensack Meadowlands, October 9-10, 2003, Lyndhurst, New Jersey, USA, p. 25.
Riberdy, R. and D.U. Ophori. 2003. Groundwater flow at a proposed wetland mitigation site. (abstract). Abstract with Programs , The 6 th US Environmental Protection Agency (US EPA) Wetlands Workshop, October 27-30, 2003, Atlantic City, New Jersey, USA.
Ophori, D.U . 2004. Analyzing groundwater movement for environmental waste control. (abstract). Abstract with Programs , The Urban Dimensions of Environmental Change: Science, Exposures, Policies and Technologies, May 25-28, 2004, Shanghai, China, p.67.
Yidana, S. M. and D.U. Ophori. 2006. A multivariate statistical analysis of water chemistry – The Ankobra Basin, Ghana (abstract). Abstract with Programs, GSA 41st Annual Meeting, Northeastern Section, March 20-22, 2006, Camp Hill/Harrisburg, Pennsylvania, U.S.A., p. 64.
Ophori, D.U. and F. Barry. 2006. Development and calibration of a groundwater flow model, Passaic River Basin, New Jersey (abstract). Abstract with Programs, GSA 41st Annual Meeting, Northeastern Section, March 20-22, 2006, Camp Hill/Harrisburg, Pennsylvania, U.S.A., p. 74.
Ophori, D.U., M. Gorring, K. Olsen, J. Hope and E. Orhuah. 2006. Groundwater quality of shallow domestic water supply wells, Ughelli, Nigeria (abstract). Conference Program and the Journal of Abstracts , International Conference on Infrastructural Development and the Environment (ICIDEN-Abuja 2006), September 10-15, 2006, Abuja, Nigeria, p. 68-69.
Ophori, D.U. 2006. A preliminary simulation of large-scale groundwater flow in the Niger Delta, Nigeria (abstract). Conference Program and the Journal of Abstracts , International Conference on Infrastructural Development and the Environment (ICIDEN-Abuja 2006), September 10-15, 2006, Abuja, Nigeria, p. 68.
Barry, F., D.U. Ophori, J. Hoffman and R. Canace. 2006. Simulation of groundwater response to development, Passaic River Basin, New Jersey (abstract). Abstract with Programs , Second Passaic River Symposium: Progress and Challenges, October 13, 2006, Montclair State University, Upper Montclair, New Jersey, pp. 39.
Ophori, D.U., F. Barry, J. Hoffman and R. Canace. 2006. Simulation of the effects of groundwater pumping on wetareas, Passaic River Watershed, New Jersey (abstract). Abstract with Programs, The 9 th Annual Wetlands and Watersheds Workshop, October 23-26, 2006, Holiday Inn Boardwalk, Atlantic City, New Jersey, pp. 30-31.
Ophori, D.U . 2007. A preliminary simulation of large-scale groundwater flow in the Niger Delta, Nigeria. Abstract with Programs, Geological Society of America (GSA) Annual Meeting and Exposition, October 28-31, 2007, Denver, Colorado, USA, Vol. 39, No. 6, p. 266.
Ophori, D.U. 1982. Evaluation of the Forewell induced infiltration site, Kitchener-Waterloo, Ontario. M.Sc. Thesis, University of Waterloo, Waterloo, Ontario, Canada.
Ophori, D.U. and J. Tóth. 1983. A study of water resources development and management, Ross Creek Basin, Alberta. Progress Report I, Planning Division, Alberta Environment , Lethbridge, Alberta, Canada.
Ophori, D.U. and J. Tóth. 1985. A study of water resources development and management, Ross Creek Basin, Alberta. Progress Report II, Planning Division, Alberta Environment , Lethbridge, Alberta, Canada.
Ophori, D.U. and J. Tóth. 1986. A study of water resources development and management, Ross Creek Basin, Alberta. Final Report, Planning Division, Alberta Environment , Lethbridge, Alberta, Canada.
Ophori, D.U. 1986. A numerical simulation analysis of regional groundwater flow for basin management: Plains Regions, Alberta. Ph.D. Thesis, University of Alberta,Edmonton, Alberta, Canada.
Ophori, D.U ., T. Chan and F.W. Stanchell. 1994. Sensitivity analysis of the effects of a domestic water supply well in the Whiteshell Research Area. Atomic Energy of Canada Limited Technical Record , TR-619, COG-93-202, Pinawa, Manitoba, Canada.
Ophori, D.U. and T. Chan. 1994. Regional groundwater flow in the Atikokan Research Area: Simulation of 18O and 3H distributions. Atomic Energy of Canada Limited Report, AECL-11083, COG-94-185, Pinawa, Manitoba, Canada.
Davison, C.C, T. Chan, A. Brown, M. Gascoyne, D.C. Kamineni, G.S. Lodha, T.W. Melnyk, B.W. Nakka, P.A. O’Connor, D.U. Ophori, N.W. Scheier, N.M. Soonawala, F.W. Stanchell, D.R. Stevenson, G.A. Thorne, T.T. Vandergraff, P. Vilks and S.H. Whitaker. 1994. The disposal of Canada’s nuclear fuel waste: The Geosphere model for postclosure assessment. Atomic Energy of Canada Limited Report, AECL-10719, COG-93-9, Pinawa, Manitoba, Canada.
Ophori, D.U ., D.R. Stevenson, M. Gascoyne, A. Brown, C.C. Davison, T. Chan and F.W. Stanchell. 1995. Revised model of regional groundwater flow of the Whiteshell Research Area: Summary. Atomic Energy of Canada Limited Report,AECL-11286, COG-95-115, Pinawa, Manitoba, Canada.
Ophori, D.U. 1996. Regional groundwater flow in the Atikokan Research Area: Spatially variable density and viscosity. Atomic Energy of Canada Limited Report , AECL-11082, COG-94-184, Pinawa, Manitoba, Canada.
Ophori, D.U. and T. Chan. 1996. Regional groundwater flow in the Atikokan Research Area: Model development and calibration. Atomic Energy of Canada Limited Report, AECL-11081, COG-94-183, Pinawa, Manitoba, Canada.
Ophori, D.U ., A. Brown, T. Chan, C.C. Davison, M. Gascoyne, N.W. Scheier, F.W. Stanchell and D.R. Stevenson. 1996. Revised model of regional groundwater flow of the Whiteshell Research Area. Atomic Energy of Canada Limited Report,AECL-11435, COG-95-443, Pinawa, Manitoba, Canada.
Ophori, D.U. and T. Chan. 1996. Two-dimensional simulations of groundwater flow in variations of a conceptual model of the Whiteshell Research Area. Atomic Energy of Canada Limited Report , AECL-11360, COG-95-309, Pinawa, Manitoba, Canada.
Lodha, G.S., C.C. Davison, A. Brown, T. Chan, M. Gascoyne, E.T. Kozak, D.R. Stevenson, G.A. Thorne, with contributions from R.B. Cooper, R.A. Everitt, L.H. Frost, C.D. Martin, D.U. Ophori, R.I. Sikorsky and F.W. Stanchell. 1996. Recommendations for site evaluation/characterization approach in Spanish Granite: A Report submitted to ENRESA, Spain.
Stevenson, D.R., A. Brown, C.C. Davison, M. Gascoyne, R.G. McGregor, D.U. Ophori, N.W. Scheier, F.W. Stanchell, G.A. Thorne and D.K. Tomsons. 1996. A revised conceptual hydrogeological model of a crystalline rock environment, Whiteshell Research Area, southeastern Manitoba, Canada. Atomic Energy of Canada Limited Report , AECL-11331, COG-95-271, Pinawa, Manitoba, Canada.
Ophori, D.U. and B. Maharjan. 1998. Field studies and numerical modeling of the risk of water table contamination from contaminated surface sources in Long Island, New York. Progress Report on the First Year of Study (Oct. 1997-sept 1998). Characterization of the Unsaturated Zone.
Ophori, D.U. and B. Maharjan. 1999. Field studies and numerical modeling of the risk of water table contamination from contaminated surface sources in Long Island, New York. Progress Report on the Second Year of Study (Oct. 1998-sept 1999). Simulation of Groundwater Flow in Long Island.
Ophori, D.U. and B. Maharjan. 2001. Field studies and numerical modeling of the risk of water table contamination from contaminated surface sources in Long Island, New York. Final Report, Environmental Protection Agency (EPA), Region 2, New York.
