Associate Professor
Dept of Geology and Environmental Geosciences
College of Charleston
Charleston, SC USA
phone: (843) 953-5589
fax: -5446
callahant@cofc.edu
Water Resources field trip,
Sep. 2008:
Jones Gap State Park, South Carolina
(right-click and "View Image" to see larger version of each photo)
Coastal Plain Hydrology Group: A consortium of scientists interested in ecohydrology of the Atlantic Coastal Plain of the U.S.
EDUCATION
B.A. Geology, 1991. University of St. Thomas,
St. Paul , Minnesota
M.S. Geochemistry, 1995. New Mexico Institute of Mining and Technology,
Socorro
Ph.D. Earth and
Environmental Science (with Dissertation in Hydrology), 2001. New
Mexico Institute of Mining and Technology
EMPLOYMENT HISTORY
2007-present: Associate Professor of Geology and Environmental Geosciences, College of Charleston
2001-2007: Assistant Professor of Geology and Environmental Geosciences, College of Charleston
1995-2001: Research Assistant (Hydrology and
Geochemistry), Los Alamos National Laboratory
TEACHING Geology Dept and Master of Science in Environmental Studies (MES) Program
Hydrogeology and Lab, GEOL 438/EVSS 638
Environmental Pollution, EVSS 695 (team-taught with Dr. Vijay Vulava)
Water Resources, GEOL 238
Wetlands, EVSS 639 (team-taught with Dr. Vijay Vulava)
Dynamic Earth, GEOL 101
Earth History, GEOL 105
PUBLICATIONS
Amatya, D.M., T.J. Callahan,
A. Radecki-Pawlik, P. Drewes, C. Trettin, and W.F. Hansen. 2008. Hydrologic and Water Quality Monitoring on Turkey Creek Watershed,
Francis Marion National Forest, SC. In: Proc. 2008 South Carolina Water Resources Conference, October 14-15, 2008, North Charleston, SC.
PDF
Sun, G., J. Boggs, D.M. Amatya,
C.C. Trettin, Z. Dai, J.M. Vose, I.B. LaTorre Torres, and T.J. Callahan. 2008. Hydrologic Processes of Forested Headwater Across a
Physiographic Gradient in the Southeastern United States. In: Proc. 2008 South Carolina Water Resources Conference, October 14-15, 2008, North Charleston, SC.
PDF
Vulava, V.M., C.G. Garrett,
C.L. Ginn, and T.J. Callahan. 2008. Application of geochemical end-member mixing analysis to delineate water sources in a lowland watershed.
In: Proc. 2008 South Carolina Water Resources Conference, October 14-15, 2008, North Charleston, SC.
PDF
Pyzoha, J.E., T.J. Callahan,
G. Sun, and C.C. Trettin. 2008. A conceptual hydrologic model for a
forested Carolina bay depressional wetland on the Coastal Plain of
South Carolina, USA. Hydrol. Process. 22 (14):2689-2998. doi:10.1002/hyp6866.
PDF
Reimus, P.W. and T.J. Callahan. 2007. Matrix Diffusion Rates in Fractured Volcanic Rock at the Nevada Test Site: Evidence for a Dominant Influence of Effective Fracture Apertures. Water Resour. Res. 43:W07421. doi:10.1029/2006WR005746. PDF
Reimus, P.W., T.J. Callahan, S.D. Ware, M.J. Haga, and D.A. Counce. 2007. Matrix Diffusion Coefficients in Volcanic Rocks at the Nevada Test Site: Influence of Matrix Porosity, Matrix Permeability, and Fracture Coating Minerals. J. Contam. Hydrol. 93:85-95. PDF
Harder, S.V., D.M. Amatya, T.J. Callahan, C.C. Trettin, and J. Hakkila. 2007. Hydrology and Water Budget for a First Order Forested Coastal Plain Watershed, South Carolina. J. Amer. Water Resour. Assoc. 43(3):563-575. doi: 10.1111/j.1752-1688.2007.00035.x. PDF
Sun, G., T.J. Callahan, J.E. Pyzoha, and C.C. Trettin. 2006. Modeling the Climatic and Geomorphologic Controls on the Hydrology of a Carolina Bay Wetland, South Carolina, USA. Wetlands 26(2):567-580. PDF
Amatya D.M., C.C. Trettin, R.W. Skaggs, M.K. Burke, T.J. Callahan, G. Sun, J.E. Nettles, J.E. Parsons, and M. Miwa. 2005. Five hydrologic
studies conducted by or in cooperation with the Center for Forested Wetlands
Research, USDA Forest Service. USDA Forest Service Report, Research
Paper SRS-40, Asheville, NC.
Dickerson, D. and T.J.
Callahan. 2005. Students'
Conceptions of Scale Regarding Groundwater. J.
Geosci. Educ. 53(4):374-380. PDF
Sun, G., T.J. Callahan, J.E. Pyzoha, C.C. Trettin, and D.M. Amatya.
2004. Modeling the hydrologic
processes of a depressional forested wetland in South Carolina, U.S.A. In: Proc.
6th Int’l. Conf. on Hydrosci. and Engin. (ICHE-2004), 30 May-3 June
2004, Brisbane, Australia.
Callahan, T.J., J.D. Cook,
M.C. Coleman, D.M. Amatya, and C.C. Trettin. 2004. Measuring and Modeling Storm Water Runoff and Soil Interflow in a Managed
Forest, Upper Coastal Plain of the Southeast US. In:
Proc. ASAE/CSAE Annual Int’l. Meeting, 1-4 August
2004, Ottawa, Ontario, Canada.
Reimus, P.W., M.J. Haga, A.I. Adams, T.J. Callahan, H.J. Turin,
and D.A. Counce. 2003. Testing and parameterizing a conceptual solute transport
model in saturated fractured tuff using sorbing and nonsorbing tracers in
cross-hole tracer tests. J. Contam. Hydrol.
62-63:613-626. PDF
Callahan, T.J., P.W.
Reimus, P.C. Lichtner, and R.S. Bowman. 2002. Multicomponent effects on the
transport of cations undergoing ion exchange in fractured media. In:
Bridging the Gap Between Measurement and Modeling in Heterogeneous Media (A. N.
Findikakis, ed.). Proc. Int’l. Groundwater Symposium, Lawrence Berkeley National
Laboratory, 25-28 March 2002, Berkeley, California, USA. pp. 523-528.
Callahan, T.J., P.W.
Reimus, R.S. Bowman, and M.J Haga. 2000. Using multiple experimental methods to
determine fracture/matrix interactions and dispersion of nonreactive solutes in
saturated volcanic rock. Water Resour.
Res. 36(12):3547-3558.
MEMBERSHIP IN PROFESSIONAL SOCIETIES
American
Geophysical Union
Carolina Geological Society
Geological Society of America
Society of Wetland Scientists
Links