Dr. Laura Toran
Temple University
Department of Geology
ltoran@temple.edu
215-204-2352, 215-204-3496 (fax)
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Education |
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1976 - 1980 Macalester College St.
Paul, MN |
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Professional experience |
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1997 - present Temple University Dept
of Geology Philadelphia, PA |
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Awards Received |
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Fellow,
Geological Society of ·
Faculty ·
Weeks Chair
in Environmental Geology ( ·
Wigner
Fellowship ( ·
American
Geophysical Union Horton Research Grant, 1985 ·
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Professional Activities |
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University Service |
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CURRENT FUNDING:
2007-2011: Duffy, C., Brantley,
S., Singha, K., Slingerland, R., & Toran, L., "The Susquehanna/Shale
Hills Critical Zone Observatory", National Science Foundation (NSF).
$5 million (collaborative)
2007-2009 - Featherstone, J. and others "Temple-Villanova
Sustainable Stormwater Initiative Phase II", William Penn Foundation. $330,000
2006-2010 Toran, L. and Nyquist, J. “Mapping Spatial and Temporal Heterogeneity of Lake Seepage Using Electrical Resistivity and Induced Potential” National Science Foundation (NSF). $287,000
COURSES TAUGHT:
Introduction to Hydrology, Advanced Hydrogeology, Climate Change,
Introduction to Geology, Groundwater Modeling
PEER-REVIEWED PUBLICATIONS: for pdfs see research pages
Nyquist, J., Heaney, M. and Toran, L, in press. Characterizing Lakebed Seepage and Geologic Heterogeneity Using Resistivity Imaging and Temperature Measurements. Accepted Near Surface Geophysics.
Herman, E.K., Toran, L., and White, W.B., in press. Quantifying the place of karst aquifers in
the groundwater to surface water continuum:
a time series analysis study of storm response in
Gagliano, M., Nyquist,
J., Toran, L., Rosenberry, D. 2009 Assessment of electrical resistivity method to map groundwater seepage
zones in heterogeneous sediments. Symposium for the
Application of Geophysics to Environmental and Engineering Problems. 9 pp.
Toran, L., Gross, K., and Yang, Y. 2009.
Effects of restricted recharge in and urban karst system. Environmental Geology. DOI 10.1007/s00254-008-1500-0, 58: 131-139.
Mitchell, N., Nyquist, J., Toran, L., Rosenberry, D., and Mikochik, J.
2008. Electrical resistivity as a tool for identifying geologic
heterogeneities which control seepage at
Nyquist, J. E., Freyer, P. A., and
Toran, L. , 2008 Stream Bottom Resistivity Tomography to Map Ground-Water
Discharge. Ground Water, 46 (4), 561-569.
Herman, E.K., Toran, L., and White, W.B., 2008 Threshold events in spring discharge: evidence from sediment and continuous water level measurement. Journal of Hydrology. 351 (1-2), 98-106.
Heaney, Matthew J.,
Nyquist, Jonathan E., and Toran, Laura, 2007.
Marine resistivity as a tool for characterizing zones of seepage at
Toran, L, Herman, E.K., and White, W.B., 2007. Comparison of Flow Paths to a Well and Spring
in a Karst Aquifer. Ground Water.
45: 281-287.
Herman, EK Tancredi, JH, Toran, L and White, WB, 2007. Mineralogy of suspended sediment in karst springs in
relation to spring water chemistry.
Hydrogeology Journal. 15:
255-266
Freyer, Paul A., Nyquist, Jonathan E., and Toran, Laura,
2006. Use of underwater resistivity in
the assessment of groundwater-surface water interaction within the Burd Run
Watershed. Proceedings of the Annual
Symposium on the Application of Geophysics to Engineering and Environmental
Problems,
Ham, Jeffrey, Toran, Laura, and Cruz, Jay, 2006. Effect of upstream ponds on stream temperature. Environmental Geology. DOI: 10.1007/s00254-006-0186-4
Toran, L., Tancredi, J., Herman, E.K., and White, W.B. 2006.
Conductivity and sediment variation during storms as evidence for
pathways in karst springs. Geological
Society of
Toran, L., and Roman, E.
2006. CO2 outgassing
in a combined fracture and conduit karst aquifer near
Toran, L and White W B. 2005. Variation in nitrate and calcium as
indicators of recharge pathways in
Toran, L. and Hooper, R. 2005. Forum: What’s new with CUAHSI? Ground Water 42: 638-640.
Toran, Laura, Lipka, Charles, Baehr, Arthur, Reilly, Timothy, and Baker, Ronald. 2003.
Seasonal and daily variations in concentrations of methyl-tertiary-butyl
ether (MTBE) at
Toran, Laura. 2003. Book Review: Groundwater Science by Charles Fitts. Ground Water. 41: 406.
Toran, Laura and Grandstaff, David. 2002. PHREEQC and PHREEQCI: Geochemical Modeling with an Interactive Interface. Ground Water. 40: 462-464.
Toran, Laura and
Toran, Laura. 2000. CRAFIT: A computer program for calibrating CRAFLUSH, a 1D fracture flow and transport model. Ground Water. 38: 430-434.
Heebner, David and Laura Toran. 2000. Sensitivity analysis of 3-dimensional steady-state and transient spray irrigation models. Ground Water. 38: 20-28
Toran, Laura and James A Saunders, 1999. Modeling alternate evolution paths
of Na-HCO3-type ground water near
Toran, L.E., Bryant, S.L., Saunders, J.A., and Wheeler, M.F., 1998. Sr mobility under variable pH: Application of a coupled geochemistry and transport model. Ground Water. 36: 404-408.
McKay, L.D.,
James, B.R., Gwo, J.-P., and Toran, L.E, 1996. An economic decision framework for aquifer remediation design. ASCE Journal of Water Resources Planning and Management. 144: 404-420.
Gwo, J.-P., Toran, L.E., Morris, M.D., and
Toran, L.E. and Sjoreen, A.L., 1996. CHEMFORM: A formatting program for geochemical data. Ground Water, 34: 552-553.
Toran, L.E., Sjoreen, A.L., and Morris, M.D., 1995. Sensitivity analysis of solute transport in fractured porous media. Geophys. Res. Let., 22: 1433-1436.
Saunders, J.A. and Toran, L.E. 1995. Modeling of radionuclide and heavy
metal sorption around low- and high-pH waste disposal sites at
Toran, L.E., 1994. Radionuclide contamination in groundwater: Is there a
problem? In Groundwater Contamination and Control, U. Zoller, ed.
Saunders, J.A. and Toran, L.E., 1994. Evidence of dedolomitization and
mixing in Paleozoic carbonates near
Toran, L.E., 1994. Discussion of "The use of conditional simulation in nuclear waste site performance assessment" by Carol A. Gotway. Technometrics. 36: 150-152.
Drake, J.B., Geist, G.A., Hicks. H.R., Kliewer, K.L., Stocks, G.M., Toran, L.E., and Worley, P.H., 1993. Centers of supercomputing -- The Center for Computational Sciences (CCS) at Oak Ridge National Laboratory (ORNL). International Journal of Supercomputing. 7: 3-14.
Toran, L.E., 1993. Book Review of Ground-water microbiology and geochemistry by Francis H. Chapelle. Ground Water. v. 31: 685.
Toran, L.E. and Palumbo, A.V. 1992. Transport of bacteria-sized particles through fractured and unfractured laboratory sand columns. Journal of Contaminant Hydrology, 9: 289-303.
Toran, L. and Harris, R.F., 1989. Interpretation of sulfur and oxygen isotopes in biological and abiological sulfide oxidation. Geochemica Cosmochemica et Acta, 53, 2341-2348.
Toran, L., 1989. Carbon isotope mass transfer as evidence for contaminant dilution. In R.L. Bassett and D.C. Melchior, eds. Chemical Modeling in Aqueous Systems II. ACS Symposium Series 416, Chapter 14, 190-201.
Toran, L. and Bradbury, K.R., 1988. Groundwater flow model of drawdown and recovery near an underground mine. Ground Water, v. 26, 724-733.
Toran, L., 1987. Sulfate contamination in groundwater from a carbonate-hosted mine. Journal of Contaminant Hydrology, 2:1-29.
Toran, L., 1982. Isotopes in ground-water investigations. Ground Water, 20:740-745.
ABSTRACTS
(after 1986):
Nyquist, J. E., Toran, L. E., Johnson, M. J., and
Rosenberry, D. O. (2008), Use of Underwater Resistivity to Map Chloride in
Lakebed Sediments Beneath Mirror Lake, NH, Eos Trans. AGU, 89(53), Fall Meet.
Suppl., Abstract OS54B-04, INVITED.
Johnson, M.,
Toran, L., Nyquist, J., and Rosenberry, D. Mapping Road Salt Discharge from
Groundwater Using Electrical Resistivity, Mirror Lake, New Hampshire. 2008 Annual Meeting of the Geological Society
of
Jedrzejczyk, C.
and Toran, L., 2008. Monitoring
the Effectiveness of Stormwater Management Practices in the Pennypack Creek
Watershed,
Toran, L. 2007. Small scale water quality monitoring
in an urban watershed. Geological
Society of
Mikochik,
J., Toran, L., and Nyquist, J.
2007. Using modflow to understand
the factors controlling lake seepage patterns.
Geological Society of
Herman, Ellen K.,
Toran, Laura, and White, William B.
2007. Sediment discharge
variations in multiple
Heaney, Matthew J.,
Nyquist, Jonathan E., and Toran, Laura, 2006.
Marine resistivity as a tool for characterizing seepage zone at
Herman, Ellen K.,
Toran, Laura, and White, William B., 2006.
Sediment fluxes in karst aquifers: storm pulses, thresholds, and fluid
dynamics of mixing, storage and transport.
Geological Society of
Gross, Kathleen,
Yang, Youa and Toran, Laura, 2006.
Spring monitoring in an urban karst system. Geological Society of
Fan, Ying,
Toran, Laura, and Schlische, Roy W.
2006. Groundwater flow and
groundwater-stream interaction in fractured and dipping sedimentary rocks:
insights from numerical models.
Geological Society of
Gross, Kathleen and Toran, Laura, 2006. Geochemistry and sediment of an urban karst system. Geological Society of America Northeastern Section Meeting, March 20-22, Harrisburg , PA. Yang, Youa and Toran, Laura, 2006. Storm response in urban springs. Geological Society of America Northeastern Section Meeting, March 20-22, Harrisburg , PA. Freyer, Paul A., Nyquist, Jonathan E., and Toran, Laura, 2006. Application of underwater resistivity in the assessment of groundwater-surface water interaction, Burd Run Watershed, Shippensburg , PA. America Northeastern Section Meeting, March 20-22, Harrisburg , PA. Herman, E.K., Toran, L., and White, W.B., 2005. Quantifying the place of karst aquifers in the groundwater to surface water continuum: A time series analysis study of storm response in Pennsylvania Salt Lake City , Utah
Toran, L., Herman, E.K., and White, W.B., 2005. Comparison of spring and well monitoring data
in a carbonate aquifer. Geological
Society of American National Meeting,
Herman, E.K., Toran, L., and White, W.B., 2005. Hurricane precipitation events reveal
threshold behavior in water level and sediment concentration at
Toran, L and Paillet, F.
2004. High permeability zone in the
Toran, L. and Elsea, J.
2004. Fracture flow model of heterogeneous drawdown at North Penn 6
Superfund Site, PA. Hydrogeology of the
Herman, E. K., White, W. B., and Toran, L., 2004. Clastic sediment fluxes as an intrinsic part of
the flow system in karstic aquifers. Geological Society of American
National Meeting, Denver, CO, Nov 7-10.
Toran, L., Tancredi, J., Herman, E. K., and White, W. B.,
2004. Comparison of storm behavior in three karst springs. Geological Society of American
Northeast-Southeast Regional Meeting,
Mezengia, T., Toran, L., and Tancredi, J., 2004. Seasonal
variation of nitrates in a karst spring,
Scott, S., Toran, L., and Tancredi, J., 2004. Variation
in suspended sediment transport in a karst spring after storms. Geological Society of American
Northeast-Southeast Regional Meeting,
Rillstone, B. and Toran, L., 2004. Variability
of karst spring sediments within and between storm waters. Geological Society of American
Northeast-Southeast Regional Meeting,
Hayes, K. and Toran,
L., 2004. Geochemistry and sediment
comparisons between a karst spring and well.
Geological Society of American Northeast-Southeast Regional
Meeting,
Mejias, C. and
Toran, L., 2004. Conductivity and
suspended sediments in karst and fractured springs in
Toran, L. and Roman, E. 2003. Outgassing
as a geochemical signature of recharge water in a karst aquifer. Geological Society of American National
Meeting,
Herman, E.K., Toran, L., Tancredi, J., Target, D., White,
W.B., 2003. Variations in the timing of
karst spring response to storm flow in terms of suspended sediment and
chemistry. Geological Society of
American National Meeting,
Tancredi, J., Toran, L., Target, D., Herman, E.K., White,
W.B. 2003. Influence of antecedent conditions on conductivity and suspended
sediment discharge in a karst spring. Geological
Society of American National Meeting,
Herman, E.K., Toran, L., Tancredi, J., White, W.B. 2003.
Transport of Suspended Sediments in Karst Aquifers. International Conference on Karst
Hydrogeology and Ecosystems,
Toran, L. and Grandstaff, D.
2002. Seasonal changes in
stormwater nitrogen concentrations.
American Water Resources Association Annual Meeting,
Boufadel, M.C., Toran, L., and Gabriel, M., 2002. Techniques for increasing the reliability of estimates of surface water transport models. Eos. Trans. AGU, 83 (19) Spring Meet. Suppl. Abstract H22C-07.
Toran, L. and Maurice, P., 2002. Modeling variations in DOC and groundwater/surface water exchange in a forested stream. Eos. Trans. AGU, 83 (19) Spring Meet. Suppl. Abstract H42D-05
Toran, L, and Prout, E.
2001. Seasonal and storm response
of sediment transport in a karst system.
Geological Society of
Toran, L. 2000. Modeling tracer tests in fractured rock: is your solution unique? Geological Society of
Prout, E, Toran, L., Terry, D., Nyquist, J, and Roth, M. 2000. Variation in
sediment and colloid distribution in a karstic aquifer,
Elsea, J. and Toran, L. 2000. Fracture flow model of a pump test near the
North Penn superfund site, PA. American Geophysical Union Spring Meeting, May
30-June 3,
Roman, E. and Toran, L. 2000. Hydrogeologic characterization of a karst
groundwater system in Lititz,
Lipka, C, Toran, L., Baehr, A. Reilly, T, and Baker, R. 2000. Daily
variations in MTE contamination on a recreational lake in
Koch, E., Toran, L.,
Toran, L. 1998. Hypothetical modeling of remediation of fracture networks.
SEPM Research Conference on Fluid Flow in Carbonates, Sept 20-24, 1998,
Toran, L.E. and G.R. Moline, 1998. Modeling a Helium Tracer Plume in
Fractures Perpendicular to Gradient. American Geophysical Union Spring Meeting,
May 26-29, 1998,
Heebner, D. and Toran, L.E., 1998. Transient Sensitivity Analysis to Reduce
Uncertainty in Groundwater Model Parameters for a Spray Irrigation Site in
Toran, L.E., Hopper, C.H., Colten-Bradley, V., and Saunders, J.A., 1997.
Hydrogeochemical modeling of uranium reconfiguration and evaluation of the
potential for nuclear criticality following disposal at low-level waste
facilities. Geological Society of
Toran, L.E., Bryant, S.L., Eaton, J., and Wheeler, M.F., 1997. Coupled
geochemistry and bioreactions for remediation modeling. American Geophysical
Union, Spring Meeting, May 20-24,
McCarthy, J.F., Stafford, P.L., Toran, L.E., and
Toran, L.E., Bryant, S.L., Wheeler, M.F., and Saunders, J.A., 1996. Sr
transport under variable pH: A coupled geochemistry and transport model.
American Geophysical Union, Spring Meeting, May 20-24,
McCarthy, J.F., Stafford, P.L., Toran, L.E., and
James, B.R., Gwo, J.-P., and Toran, L.E. 1995. An economic decision
framework using modeling to improve remediation design. American Geophysical
Union, Fall Meeting, Dec. 11-15,
Toran, L., Black, K.C., and Williams, N.A., 1995. Sensitivity analysis of a
large regional model using latin hypercube sampling. American Geophysical
Union, Spring Meeting, May 30-June 2,
Toran, L.E., Ward, R., D'Azevedo, E.F., and Gwo, J.P., 1994. Parallel
computing for groundwater flow: comparison of workstations and mainframes.
American Geophysical Union, Fall Meeting, Dec. 5-9,
Gwo, J.P, and Toran, L.E., 1994. A latin-hypercube sensitivity analysis on
hillslope subsurface stormflow: implication for monitoring and remediation of
waste disposal sites. American Geophysical Union, Fall Meeting, Dec. 5-9,
Toran, L.E., Sjoreen, A.L., and Morris, M.D., 1994. Sensitivity analysis of
groundwater transport in fractured porous media. Am Geophys Union Chapman
Conference on Aqueous Phase and Mulitphase Transport in Fractured Rock. Sept.
12-15,
Toran, L.E.,
Gwo, J.P. Toran, L.E.,
Toran, L., Sjoreen, A., and Dreier, R., 1993. Modeling of a
density-dependent contaminant plume located in a regional discharge area on the
Oak Ridge Reservation. Geol Soc Am Annual Meeting,
D'Azevedo, E.F., Romine, C.H., Toran, L.E., West, O.R., Gwo, J.P., 1993. High
Performance computing for groundwater modeling and remediation. Supercomputing
93.
Toran, L., West, O.R., Gwo, J.P., 1993. Supercomputer model of an ORNL waste
area. Technology Information Exchange Workshop. Fourth National Meeting, May
11-13, 1993,
Dreier, R.B. and Toran, L.E., 1993. Geologic controls on flow patterns at
the
Shevenell, L., Dreier, R., Toran, L., and Moore, G., 1993. Use of multiport
monitoring systems at the Y-12 Plant to identify 3-D compositional
variabilities. Technology Information Exchange Workshop. Fourth National
Meeting, May 11-13, 1993,
Brown, T., Toran., L., Solomon, K.,
Dreier, R.B. and Toran, L.E., 1992. Geologic controls on flow patterns in
the Appalachian fold and thrust belt. American Geophysical Union Fall Meeting,
Toran, L.E., D'Azevedo, E.F. and Reyes, O.M., 1992. Modification of FEMWATER
for parallel computer. Spring Meeting Amer. Geophys. Union,
Toran, L.E., 1991. Complex geology, complex models. Grand Challenge News, v. 2.
Early, T.O., Dreier, R.O., Toran, L.E. and Saunders, J., 1991. Deep
groundwater contamination of fractured bedrock near
Toran, L., Solomon, D.K., McMaster, W.M., and Morrissey, C.M., 1991.
Uncertainties in C-14 dating in fractured sedimentary rock on the
Toran, L., Solomon, D.K., McMaster, W.M., and Morrissey, C.M., 1991. Matrix diffusion as a mechanism to explain recent tritium and old 14-C in groundwater from fractured sedimentary rocks. American Geophysical Union Spring Meeting, Baltimore May 28-31.
Toran, L., 1988. Long term versus short term slug tests in low permeability
formations. Annual Meeting of the Association of Ground Water Scientists and
Engineers,
Dreier, R.D., Lutz, C.T., Bitner,
Dreier, R.B., Toran, L.E., and Lutz, C.T., 1988. Hydraulic conductivity
investigations in a complexly deformed geologic environment. Geological Society
of
Toran, L., 1988. Carbon isotope mass transfer as evidence for contaminant
dilution. American Chemical Society Annual Meeting,
Toran, L., 1988. Calculation of hydraulic conductivity from slow water level
recovery. First
Lemiszki, P.J., Hatcher, R.D., Lutz, C.T., Toran, L.E., and Dreier, R.D.,
1988. Fluid movement in sedimentary rock systems. First
Toran, L. and Palumbo, A.V., 1988. Column studies of bacteria-sized
particles: retention versus transport. American Geophysical Union Meeting,
Toran, L. and Bradbury, K.R., 1987. Physical and chemical model of
groundwater contamination near an underground mine. American Geophysical Union
Meeting,
REPORTS:
Editor, Dept of Geology,
Toran, L.E., Hopper, C.M., Parks, C.V., and Colten-Bradley, V. 1999. Potential for uranium criticality following uranium disposal at low-level waste sites: Vol 2:Containerized disposal. NUREG/CR-6505/V2, 82 pp.
Toran, L.E., Hopper, C.M., Naney, M.T., Parks, C.V., Broadhead, B.R., McCarthy, J.J., and Colten-Bradley, V. 1997. Potential for uranium criticality following uranium disposal at low-level waste sites: Vol 1: Uranium blended with soil. NUREG/CR-6505/V1, 119 pp.
Jones, T.L., Toran, L.E., and Watson, D.B., 1996. Variable-Density Flow and Transport Modeling to Evaluate Anomalous Nitrate Concentrations and Pressures in GW-134. ORNL/GWPO-0024.
James, B.R., Gwo, J.-P., and Toran, L.E. 1995. An economic decision framework for aquifer remediation design. ORNL/GWPO-0017.
Sjoreen, A.L. and Toran, L.E. 1994. CHEMFORM User's Guide. ORNL/GWPO-010.
Gwo, J.-P., Toran, L.E., Morris, M.D., and
West, O.M. and Toran, L.E., 1994. Development of a three-dimensional
groundwater flow model for western
SAIC, 1993. Interim Corrective Measures Cap Evaluation Report for Waste Area
Grouping 6 at
Toran, L.E., 1993. Comparison of large and small scale models of WAG6. ORNL/ER Letter Report.
Toran, L.E. and Saunders, J.A., 1993. Geochemical and groundwater flow modeling of multiport-instrumented coreholes (GW-131 through GW-135). Y/TS-875.
Solomon, D.K.,
Toran, L.E., McCarthy, J.F., and Williams, T.M., 1990. Design of field experiment for injection of natural colloids in a sandy coastal plain aquifer. ORNL/TM-11163.
Tsay, T.K., Yeh, G.T.,
Toran, L. and Solomon, D.K., 1989. Groundwater modeling at ORNL. ORNL Review, v. 22, no. 3.
Dreier, R.B. and Toran, L.E., 1989. Hydrogeology of
Toran, L., 1988. Update on hydrology and geochemistry of hydraulic head monitoring stations. ORNL/RAP/LTR-88/44.
Toran, L. and Solomon, D.K., 1987. Hydrology and geochemistry of the hydraulic head monitoring stations (cluster wells): preliminary interpretations. ORNL/RAP/LTR-87/76.
Toran, L. and Benjamin, R., 1987. Preliminary modeling to direct characterization of groundwater flow around pipe trenches. ORNL/RAP/LTR-87/75.
Toran, L., 1986. Sulfate contamination in groundwater near an underground
mine: hydrogeochemical modeling, microbiology, and isotope geochemistry.