--- Curriculum Vitae --- Publications --- Additional Resources ---

Todd C. Rasmussen
Professor Emeritus

Hydrology & Water Resources
University of Georgia, Athens

trasmuss@gmail.com or trasmuss@uga.edu

Specialization

Fluid flow and contaminant transport through surface and subsurface environments, focusing on the physical, chemical, mathematical, and statistical description and quantification of hydrologic processes.

Current Activities

  • Groundwater.app - Groundwater-level analysis tools
  • PRASARI - Supporting water resiliency in rural villages in India
  • Analysis of water quantity and quality in Tired Creek Lake, Grady County, Georgia

Courses Taught

  • Introduction to Water Resources (undergraduate)
  • Soils and Hydrology (undergraduate)
  • Groundwater Hydrology (graduate/undergraduate)
  • Soil Physics (graduate/undergraduate)
  • Field Methods in Hydrology (graduate/undergraduate)
  • Hydrology, Geology and Soils of Georgia (graduate/undergraduate)
  • Aquifer Mechanics (graduate)
  • Hydrologic Modeling (graduate)

Education

PhD (1988) Hydrology

MS (1982) Hydrology

BS (1976) Forest Resource Management

  • School of Forestry
  • University of California, Berkeley
  • Advisor: Paul J Zinke

Academic Positions

Warnell School of Forestry & Natural Resources
University of Georgia, Athens

  • Professor emeritus (2024-present)
  • Professor (2007-2023)
  • Associate Professor (1998-2007)
  • Assistant Professor (1992-1998)

Department of Hydrology & Water Resources
College of Engineering & Mines
University of Arizona, Tucson

  • Adjunct Assistant Professor (1991-1992)
  • Assistant Research Scientist (1989-1991)
  • Research Associate (1986-1989)
  • Graduate Teaching Assistant (1980-1981)
  • Graduate Research Assistant (1979-1982)

Division of Economic & Business Research
School of Business & Public Administration
University of Arizona, Tucson

  • Graduate Research Assistant (1982-1986)

Professional Positions

AquaScience LLC, Watkinsville GA

  • Principal (2021-present)

Aqua Science Inc, Tucson AZ

  • Hydrologic Consultant (1980-1988)

US Department of Energy, Hanford WA

  • Hydrologic Intern (1983)
    Basalt Waste Isolation Project (BWIP)

Peace Corps Volunteer, Honduras

  • Watershed Technician (1976-1979)
    Corporación Honduraña de Desarrollo Forestal (CODEFOR)

Publications

Topics

Fractured Rock Hydrology

  1. Rasmussen TC, Huang CH, DD Evans (1985) Numerical experiments on artificially-generated, three-dimensional fracture networks: An examination of scale and aggregation effects. Hydrogeology of Rocks of Low Permeability, 17:676-682.
  2. Rasmussen TC (1985) Improved site characterization using multiple approaches. In: Groundwater Flow and Transport Modeling For Performance Assessment of Deep Geologic Disposal of Radioactive Waste: A Critical Evaluation of the State of the Art, US Nuclear Regulatory Commission, NUREG/CP-0079, Proceedings of Symposium, Albuquerque NM.
  3. Kilbury RK, TC Rasmussen, DD Evans, AW Warrick (1986) Water and air intake of surface-exposed rock fractures in situ. Water Resources Research, 22(10):1431-1443. https://doi.org/10.1029/WR022i010p01431
  4. Rasmussen TC (1987) Meso-scale estimates of unsaturated fractured rock fluid flow parameters. In: IW Farmer, JJK Daemen, CS Desai, CE Glass, SP Neuman [editors] (1987) US Symposium on Rock Mechanics Proceedings, 28:525-532. https://onepetro.org/ARMAUSRMS/proceedings-abstract/ARMA87/All-ARMA87/129806
  5. Evans, DD, TC Rasmussen, TJ Nicholson (1987) Fracture system characterization for unsaturated rock. Waste Management '87, 2:209-212.
  6. Rasmussen TC, DD Evans (1987) Unsaturated flow and transport through fractured rock: Related to high-level waste repositories. US Nuclear Regulatory Commission, NUREG/CR-4655, 474 pp. https://www.nrc.gov/docs/ML0331/ML033140077.pdf
  7. Rasmussen TC (1987) Computer simulation of steady fluid flow and solute transport through three-dimensional networks of variably saturated, discrete fractures. In: DD Evans, TJ Nicholson (eds), Flow and transport through unsaturated fractured rock, First edition. American Geophysical Union, Geophysical Monograph 42, p 107-114. https://doi.org/10.1029/EO068i043p01155-01
  8. Yeh TCJ, TC Rasmussen. DD Evans (1988) Simulation of liquid and vapor movement in unsaturated fractured rock at the Apache Leap Tuff Site: Models and strategies. US Nuclear Regulatory Commission, NUREG/CR-5097, 73 pp. https://www.nrc.gov/docs/ML0331/ML033160364.pdf
  9. Evans DD, TC Rasmussen (1988) Unsaturated fractured rock flow model calibration for a tuff site. International Conference and Workshop on the Validation of Flow and Transport Models for the Unsaturated Zone, Proceedings, Ruidoso NM.
  10. Rasmussen TC, Guo Z, DD Evans (1988) Unsaturated hydraulic properties of the Apache Leap Tuff matrix. International Conference and Workshop on the Validation of Flow and Transport Models for the Unsaturated Zone, Proceedings, Ruidoso NM.
  11. Tidwell VC, TC Rasmussen, DD Evans (1988) Saturated hydraulic conductivity estimates for fractured rock in the unsaturated zone. International Conference and Workshop on the Validation of Flow and Transport Models for the Unsaturated Zone, Proceedings, Ruidoso NM.
  12. Rasmussen TC, TC Yeh, DD Evans (1989) Effect of variable matrix-permeability / fracture-permeability ratios on three dimensional fractured rock hydraulic conductivity. In: Buxton BE [editor] (1989) Geostatistical, sensitivity and uncertainty methods for ground-water flow and radionuclide transport modeling, Battelle Press, p 337-358. ISBN: 978-0935470451
  13. Rasmussen TC, DD Evans (1989) Fluid flow and solute transport modeling through three-dimensional networks of variably saturated discrete fractures. US Nuclear Regulatory Commission NUREG/CR-5239, 193 pp. https://www.nrc.gov/docs/ML0331/ML033160255.pdf
  14. Sully MJ, TC Rasmussen (1989) Microscopic capillary length scales and pore size distributions for tuffaceous rocks. ASA-CSSA-SSSA Annual Meetings, Proceedings, Las Vegas NV.
  15. Rasmussen TC, JH Blanford, PJ Sheets (1989) Characterization of unsaturated fractured tuff at the Apache Leap Tuff Site: Comparison of laboratory/field, matrix/fracture and water/air flow data. FOCUS '89: Nuclear Waste Isolation in the Unsaturated Zone, Proceedings, Las Vegas NV.
  16. Rasmussen TC, TJ Nicholson, DD Evans (1990) Validation efforts in modeling flow and transport through partially saturated fractured rock - The Apache Leap Tuff Studies. GEOVAL 90: International Symposium on Validation of Geosphere Transport Models, Proceedings, Stockholm Sweden.
  17. Rasmussen TC, DD Evans (1990) Fractured Apache Leap Tuff: Interstitial, hydraulic, pneumatic, and thermal properties. Waste Management '90, Proceedings, Tucson AZ.
  18. Rasmussen TC (1991) Steady fluid flow and travel times in partially saturated fractures using a discrete air-water interface. Water Resources Research, 27(1):67-77. https://doi.org/10.1029/90WR01901
  19. Haldeman WR, Y Chuang, TC Rasmussen, DD Evans (1991) Laboratory analysis of fluid flow and solute transport through a fracture embedded in porous tuff. Water Resources Research, 27(1):53-66. https://doi.org/10.1029/90WR01902
  20. Rasmussen TC, PJ Sheets, DD Evans (1992) Unsaturated hydraulic conductivity estimates of Apache Leap Tuff obtained with a modified outflow method. In: MTh van Genuchten, FJ Leij, LJ Lund [editors] (1991) Indirect methods for estimating the hydraulic properties of unsaturated soils, University of California, Riverside, p 645-652. http://www.ars.usda.gov/sp2userfiles/place/20360500/pdf_pubs/p1337.pdf
  21. Rasmussen TC, DD Evans (1993) Water infiltration into exposed fractured rock surfaces. Soil Science Society of America Journal, 57(2):324-329. https://doi.org/10.2136/sssaj1993.03615995005700020006x
  22. Rasmussen TC (1993) Field vs. laboratory permeability estimates. 1993 Georgia Water Resources Conference, Athens GA, p. 185-188. GWRC1993b.pdf
  23. Rasmussen TC, DD Evans, PJ Sheets, JH Blanford (1993) Permeability of Apache Leap Tuff: Borehole and core measurements using water and air. Water Resources Research, 29(7):1997-2006. https://doi.org/10.1029/93WR00741
  24. Elder AN, TC Rasmussen (1994) Neutron probe calibration in unsaturated tuff. Soil Science Society of American Journal, 58:1301-1307. https://doi.org/10.2136/sssaj1994.03615995005800050004x
  25. Evans DD, TC Rasmussen (1994) Special problems in sampling fractured consolidated media. In: LG Wilson, LG Everett, SJ Cullen [editors] (1994) Vadose zone characterization and monitoring; Principles, methods and case studies. Lewis Publishers. ISBN: 978-0873716109
  26. Nicholson TJ, R Hills, M Rockhold, G Wittmeyer, TC Rasmussen, A Guzman-Guzman (1994) Partially-saturated porous and fractured media test Cases: Las Cruces and Apache Leap Tuff Studies. INTRAVAL Conference, Paris, France.
  27. Rasmussen TC (1995) Laboratory characterization of fluid flow parameters in a porous rock containing a discrete fracture. Geophysical Research Letters, 22(11):1401-1404. https://doi.org/10.1029/95GL01094
  28. Evans DD, TJ Nicholson, TC Rasmussen [editors] (2001) Flow and transport through unsaturated fractured rock, Second Edition. American Geophysical Union, Geophysical Monograph 42, 196 pp. ISBN 978-1118668504. https://doi.org/10.1029/GM042
  29. Evans DD, TC Rasmussen, TJ Nicholson (2001) Flow and transport through unsaturated fractured rock: An overview. In: DD Evans, TJ Nicholson, TC Rasmussen [editors] (2001) Flow and transport through unsaturated fractured rock, Second Edition. American Geophysical Union, Geophysical Monograph 42:1-18. https://doi.org//10.1029/GM042p0001
  30. Rasmussen TC (2001) Pressure wave vs. tracer velocities through unsaturated fractured rock. In: DD Evans, TJ Nicholson, TC Rasmussen [editors] (2001) Flow and transport through unsaturated fractured rock, Second Edition. American Geophysical Union, Geophysical Monograph 42:45-52. https://doi.org//10.1029/GM042p0045

Surface Water Hydrology

  1. Rasmussen TC, FC Tracy (1981) Use of the Universal Soil Loss Equation in the tropics. Hydrology and Water Resources in Arizona and the Southwest, Proceedings of the AAAS and AWRA - Arizona Chapter, 11:47-53. http://hdl.handle.net/10150/301229
  2. Chen YD, TC Rasmussen (1993) The role and design of water quality monitoring on forested watersheds. 1993 Georgia Water Resources Conference, Proceedings, Athens GA, p. 138-141. GWRC1993a.pdf
  3. Chen YD, SC McCutcheon, TC Rasmussen, WL Nutter, RF Carsel (1993) Integrating water quality modeling with ecological risk assessment for nonpoint source pollution control: A conceptual framework. Water Science & Technology 28:431-440. https://doi.org/10.2166/wst.1993.0446
  4. Kundell JE, TC Rasmussen (1995) Recommendations of the Georgia Board of Regents' Scientific Panel on evaluating the erosion measurement standard defined by the Georgia Erosion and Sedimentation Act. 1995 Georgia Water Resources Conference, Athens GA, p. 211-217. GWRC1995b.pdf
  5. Rasmussen TC, JE Kundell (1996) Enforceable turbidity standards: The policy and technical debate in Georgia. Effectiveness of Erosion and Sediment Control: Practices and Perspectives, Proceedings, North Carolina Sedimentation Control Commission, Raleigh NC.
  6. Holmbeck-Pelham SA, TC Rasmussen (1997) Characterization of temporal and spatial variability of turbidity in the Upper Chattahoochee River. 1997 Georgia Water Resources Conference, Athens GA, p. 144-147. GWRC1997d.pdf
  7. Calhoun DL, TC Rasmussen (1999) Real-time density and sediment measurements using pressure transducers. 1999 Georgia Water Resources Conference, Proceedings, Athens GA, p. 303-306. GWRC1999c.pdf
  8. Cox BV, TC Rasmussen (1999) Daily sediment loads in the North Oconee River. 1999 Georgia Water Resources Conference, Proceedings, Athens GA, p. 307-309. GWRC1999a.pdf
  9. Lewis AJ, TC Rasmussen (1999) Determination of suspended sediment concentrations and particle size distributions using pressure measurements. Journal of Environmental Quality, 28:1490-1496. https://doi.org/10.2134/jeq1999.00472425002800050014x D
  10. Calhoun DL, TC Rasmussen (2001) Densimetric monitoring of suspended-sediment concentrations, Northeastern Georgia. Seventh Federal Interagency Sedimentation Conference, Proceedings, Reno NV. https://pubs.usgs.gov/misc/FISC_1947-2006/pdf/1st-7thFISCs-CD/7thFISC/7Fisc-V1/7FISC1-3.pdf#page=90
  11. Vallotton BA, TC Rasmussen (2001) Interviews of Georgia water resources scientists and managers. 2001 Georgia Water Resources Conference, Proceedings, Athens GA, p. 525-527. GWRC2001c
  12. Holliday CP, TC Rasmussen, WP Miller (2001) Establishing the relationship between turbidity and total suspended sediment concentration. 2001 Georgia Water Resources Conference, Proceedings, Athens GA. GWRC2001a
  13. Radcliffe DE, TC Rasmussen (2001) Preliminary sediment analysis for the Broad River. 2001 Georgia Water Resources Conference, Proceedings, Athens GA. GWRC2001b
  14. TC Rasmussen, SA Holmbeck-Pelham (2003) Defining a stormwater managemen plan: Setting the stage for watershed protection. 2003 Georgia Water Resources Conference, Proceedings, Athens GA. GWRC2003b
  15. Keeler AG, TC Rasmussen (2005) Essential decisions for an instream flow policy. 2005 Georgia Water Resources Conference, Proceedings, Athens GA, p. 266-269. GWRC2005a.pdf
  16. Carroll GD, TC Rasmussen (2005) Identifying sewage failures in urban environments: Examples from Athens, GA. 2005 Georgia Water Resources Conference, Proceedings, Athens GA, p. 218-231. pubs/GWRC2005c.pdf
  17. Tollner EW, TC Rasmussen, B Upchurch, J Sikes (2005) Simulated moving bed form effects on real-time in-stream sediment concentration measurement with densitometry. Journal of Hydraulic Engineering - ASCE, 131(12):1141-1144. https://doi.org/10.1061/(ASCE)0733-9429(2005)131:12(1141)
  18. Tedela N, SC McCutcheon, TC Rasmussen (2007) Effects of seasonal variation on runoff Curve Number for selected watersheds of Georgia: Preliminary study. 2007 Georgia Water Resources Conference, Proceedings, Athens GA, p. 64-67. GWRC2007e.pdf
  19. Little E, S Eggert, D Wenner, T Rasmussen, D Conners, D Fischer (2007) Results from six years of community-based volunteer water quality monitoring by the Upper Oconee Watershed Network. 2007 Georgia Water Resources Conference, Proceedings, Athens GA, p. 438-441. GWRC2007a.pdf
  20. Sheridan R, GD Carroll, CR Jackson, TC Rasmussen JL Shelton (2009) Simple alternative methods for the biological component of watershed assessments. 2009 Georgia Water Resources Conference, Proceedings, Athens GA. GWRC2009c.pdf
  21. Rasmussen TC (2011) Hydrologic impacts of energy production. 2011 Georgia Water Resources Conference, Proceedings, Athens GA. GWRC2011b.pdf
  22. Avant BK, AR Ignatius, TC Rasmussen, AJ Grundstein, TL Mote, JM Shepherd (2011) Coupling tritium release data with remotely sensed precipitation data to assess model uncertainties. 2011 Georgia Water Resources Conference, Proceedings, Athens GA. GWRC2011a.pdf
  23. Ssegane H, EW Tollner, Y Mohamoud, TC Rasmussen, JF Dowd (2011) Beyond correlation: The search for causal relationships between flow percentiles and watershed variables. 2011 Georgia Water Resources Conference, Proceedings, Athens GA. GWRC2011c.pdf
  24. Tedela NH, SC McCutcheon, TC Rasmussen, RH Hawkins, WT Swank, JL Campbell, MB Adams, CR Jackson, EW Tollner (2012) Runoff curve numbers for 10 small forested watersheds in the mountains of the eastern United States. Journal of Hydrologic Engineering, Special Issue 7(11):1188-1198. https://doi.org/10.1061/(ASCE)HE.1943-5584.0000436
  25. Tedela NH, SC McCutcheon SC, JL Campbell, WT Swank, MB Adams, TC Rasmussen (2012) Curve numbers for nine mountainous eastern U.S. watersheds: Seasonal variation and forest cutting. Journal of Hydrologic Engineering, Special Issue 7(11):1199-1203. https://doi.org/10.1061/(ASCE)HE.1943-5584.0000437
  26. Ssegane H, EW Tollner, YM Mohamoud, TC Rasmussen, JF Dowd (2012) Advances in variable selection methods I: Causal selection methods versus stepwise regression and principal component analysis on data of known and unknown functional relationships. Journal of Hydrology, 438-439:16-25. https://doi.org/10.1016/j.jhydrol.2012.01.008
  27. Ssegane H, EW Tollner, YM Mohamoud, TC Rasmussen, JF Dowd (2012) Advances in variable selection methods II: Effect of variable selection method on classification of hydrologically similar watersheds in three mid-Atlantic ecoregions. Journal of Hydrology, 438-439:26-38. https://doi.org/10.1016/j.jhydrol.2012.01.035
  28. McKay SK, TC Rasmussen (2013) Declaring drought for effective water management. 2013 Georgia Water Resources Conference, Proceedings, Athens GA. GWRC2013a.pdf
  29. Sun G, PV Caldwell, SG McNulty, AP Georgakakos, S Arumugam, J Cruise, RT McNider, A Terando, PA Conrads, J Feldt, V Misra, L Romolo, TC Rasmussen, DA Marion (2013) Impacts of climate change and variability on water resources in the Southeast USA. Southern Research Station, USDA Forest Service, NCA Southeast Technical Report 204-234. https://research.fs.usda.gov/treesearch/44289
  30. Mowrer J, M Cabrera, TC Rasmussen, K Cassity-Duffey (2014) Nitrogen in stored poultry litter: Uric acid and xanthine. Journal of Environmental Quality 43(6):2137-2145. https://doi.org/10.2134/jeq2014.05.0240
  31. Bhuiyan RA, TC Rasmussen (2015) A study of chloride and rhodamine dye tracer movement through an urban stream and raingarden. 2015 Georgia Water Resources Conference, Proceedings, Athens GA.
  32. Rasmussen TC, SE Younger, JB Deemy, LE Brockman, SE Kirk (2016) Big data that supports hydrologic modeling from continental to hillslope scales. American Geophysical Union, Fall Meeting, San Francisco CA. Poster
  33. Rugel K, SW Golladay, CR Jackson, TC Rasmussen (2016) Delineating groundwater/surface water interaction in a karst watershed: Lower Flint River Basin, southwestern Georgia, USA. Journal of Hydrology: Regional Studies, 5:1-19. https://doi.org/10.1016/j.ejrh.2015.11.011
  34. Saintil T, DE Radcliffe, TC Rasmussen, A Kannan (2017) Trail Creek I: Assessing the water quality of streams using fecal indicator bacteria and microbial source tracking. American Geophysical Union, Fall Meeting, New Orleans LA.
  35. Rasmussen TC (2017) Big data in hydrology: Information management from hillslope to continental scales. 2017 Georgia Water Resources Conference, Proceedings, Athens GA. GWRC2017b.pdf
  36. Saintil T, A Kannan, DE Radcliffe, TC Rasmussen, M Habteselassie, J Calabria (2017) Water quality assessment of streams in the Trail Creek watershed, Georgia. 2017 Georgia Water Resources Conference, Proceedings, Athens GA. GWRC2017d.pdf
  37. Pruitt CA, DS Leigh, TC Rasmussen, OP Flite III (2017) A sediment yield investigation in an urban stream. 2017 Georgia Water Resources Conference, Proceedings, Athens GA. GWRC2017e.pdf
  38. Francis JN, JB Deemy, TC Rasmussen (2017) A conceptual model demonstrating experiential learning, watershed education, and volunteer research using campus streams and Lake Herrick. 2019 Georgia Water Resources Conference, Proceedings, Athens GA. GWRC2017g.pdf
  39. Webster C, A Milewski, TC Rasmussen, JF Dowd, RR Rotz, HH Hutcheson, S Maher, J Ertel, J Faustini, Grant Graves (2017) Immediate and long term threats to water resource availability at Felsenthal National Wildlife Refuge. 2017 Georgia Water Resources Conference, Proceedings, Athens GA. GWRC2017h
  40. Milewski AM, MB Thomas, WM Seyoum, TC Rasmussen (2019) Spatial downscaling of GRACE TWSA data to identify spatiotemporal groundwater level trends in the Upper Floridan Aquifer, Georgia, USA, Remote Sensing 11:2756. https://doi.org/10.3390/rs11232756
  41. Rugel K, SW Golladay, CR Jackson, RJ McDowell, JF Dowd, TC Rasmussen (2019) Using hydrogeomorphic patterns to predict aquifer-stream interaction in a karst basin: Lower Flint River Basin, Southwestern Georgia, USA. Journal of Hydrology: Regional Studies, 23:100603. https://doi.org/10.1016/j.ejrh.2019.100603
  42. Hiott C, A Milewski, S Asher, TC Rasmussen, M Moorman, JM Faustini (2019) Evaluating water resources and threats at the Carolina Sandhills National Wildlife Refuge. American Geophysical Union Fall Meeting, H54I-05, New Orleans LA, https://agu.confex.com/agu/fm21/meetingapp.cgi/Paper/981489
  43. Moraes FDS, TL Mote, TC Rasmussen (2019) The role of physical geography on Puerto Rico water budget and potential groundwater recharge. American Geophysical Union Fall Meeting, H13A-06, New Orleans LA.
  44. Younger SE, CRt Jackson, TC Rasmussen (2019) Influence of forest and vegetation type on annual evapotranspiration estimated by water budgets across 46 rural basins in the Southeastern US. 2019 Georgia Water Resources Conference, Proceedings, Athens GA.
  45. Rasmussen TC, S Raulerson (2019), Multi-decadal forest streamflow behavior in Falling Creek, Georgia. 2019 Georgia Water Resources Conference, Proceedings, Athens GA. GWRC2019b.pdf
  46. Marneault L, TC Rasmussen, P Bumpers (2019) Twenty years of community stream monitoring in Athens, GA: Analysis and policy recommendations. 2019 Georgia Water Resources Conference, Proceedings, Athens GA.
  47. Creviston MJ, AM Milewski, H Hutcheson, TC Rasmussen, M Moorman, J Faustini, J Conrad (2019) Land use and land cover change in the Caloosahatchee River Basin in Southern Florida. 2019 Georgia Water Resources Conference, Proceedings, Athens GA.
  48. Younger SE, CR Jackson, TC Rasmussen (2020) Relationships among forest type, watershed characteristics, and watershed ET in rural basins of the Southeastern US. Journal of Hydrology, 591:125316. https://doi.org/10.1016/j.jhydrol.2020.125316
  49. Rasmussen TC, M Foroughi, D Markewitz (2021) Carbon and nutrient fluxes within southeastern piedmont critical zones. In: A Hunt, M Egli, B Faybishenko [editors] (2021) Hydrogeology, Chemical Weathering, and Soil Formation Chapter 12. https://doi.org/10.1002/9781119563952.ch12
  50. Barrie CJ, TC Rasmussen, EW Tollner, SW Golladay, ST Brantley (2022) Steady vs dynamic stream-aquifer interactions: Lower Flint River Basin, Southwest Georgia, USA. Journal of Hydrology: Regional Studie, 40:101046 https://doi.org/10.1016/j.ejrh.2022.101046
  51. Jackson CR, SJ Wenger, BP Bledsoe, JM Shepherd, KA Capps, AD Rosemond, MJ Paul, M Welch-Devine, T Stephens, TC Rasmussen (202f) Water supply, waste assimilation, and low-flow issues facing the Southeast Piedmont Interstate-85 Urban Archipelago. Journal of the American Water Resources Association 59(5):1146-1161. https://doi.org/10.1111/1752-1688.13130
  52. Moraes FDS, TL Mote, TC Rasmussen (2023) The role of physical geography on Puerto Rico's water budget. Journal of Hydrology: Regional Studies 47:101382. https://doi.org/10.1016/j.ejrh.2023.101382

Complex Variable Boundary Integral Method

  1. Yu GQ, TC Rasmussen (1997) Application of the ordinary least squares approach for solution of complex variable boundary element problems. International Journal of Numerical Methods in Engineering, 40(7):1281-1293. https://doi.org/10.1002/(SICI)1097-0207(19970415)40:7%3C1281::AID-NME114%3E3.0.CO;2-4
  2. Rasmussen TC, Yu GQ (1997) Complex variable boundary integral modeling of groundwater flow and transport. 1997 Georgia Water Resources Conference, Proceedings, Athens GA, p. 379-382. GWRC1997a.pdf
  3. Rasmussen TC, Yu GQ (2003) A complex variable boundary-element strategy for determining groundwater flownets and travel times. Advances in Water Resources 26(4):395-406. http://www.sciencedirect.com/science/article/pii/S0309170802001811
  4. Rasmussen TC, GQ Yu (2004) Determination of groundwater flow velocities using complex flux boundary conditions. Developments in Water Science, 55(1):393-404. https://doi.org/10.1016/S0167-5648(04)80067-4
  5. Rasmussen TC, Yu GQ (2004) Determination of groundwater velocities using complex flux boundary conditions. In: CT Miller, MW Farthing, WG Gray, GF Pinder [editors] (2004) Computational Methods in Water Resources, XVth International Conference on Computational Methods in Water Resources (CMWR XV), Proceedings, Chapel Hill NC, p. 393-404.
  6. Rasmussen TC, Yu GQ (2006) Determination of groundwater flownets, fluxes, velocities, and travel times using the complex variable boundary element method. Engineering Analysis with Boundary Elements, 30(12):1030-1044. https://doi.org/10.1016/j.enganabound.2006.01.017

Barometric and Tidal Influences on Groundwater

  1. Davis DR, TC Rasmussen (1993) A comparison of linear regression with Clark's method for estimating barometric efficiency of confined aquifers, Water Resources Research, 29(6):1849-1854. https://doi.org/10.1029/93WR00560
  2. Crawford LA, TC Rasmussen (1995) Effects of barometric pressure on water levels and gradients at the Savannah River Site. 1995 Georgia Water Resources Conference, Athens GA, p. 224-228. GWRC1995c.pdf
  3. Rasmussen TC, LA Crawford (1997) Identifying and removing barometric pressure effects in confined and unconfined aquifers. Ground Water, 35(3):502-511. https://doi.org/10.1111/j.1745-6584.1997.tb00111.x
  4. Toll NJ, TC Rasmussen (2007) Removal of barometric pressure effects and Earth tides from observed water levels. Ground Water, 45(1):101-105. https://doi.org/10.1111/j.1745-6584.2006.00254.x
  5. Rasmussen TC, TL Mote (2007) Monitoring surface and subsurface water storage using confined aquifer water levels at the Savannah River Site, USA. Vadose Zone Journal, 6(2):327-335. https://doi.org/10.2136/vzj2006.0049
  6. Rasmussen TC (2019) Barometric efficiency. In: PA Maurice [editor] (2019) Encyclopedia of Water: Science, Technology, and Society, John Wiley and Sons. ISBN: 978-1119300755 https://doi.org/10.1002/9781119300762.wsts0108
  7. Rasmussen TC (2019) Tidal efficiency. In: PA Maurice [editor] (2019) Encyclopedia of Water: Science, Technology, and Society, John Wiley and Sons. ISBN: 978-1119300755 https://doi.org/10.1002/9781119300762.wsts0113
  8. Rau GC, D Schweizer, C Turnadge, P Blum, Todd C Rasmussen (2021) A new Python package to estimate hydraulic and poroelastic groundwater properties using standard pressure records. EGU General Assembly 2021, EGU21-4679. https://doi.org/10.5194/egusphere-egu21-4679
  9. Haehnel P, GC Rau, TC Rasmussen (2023) Disentangling aquifer dynamics in coastal groundwater systems using high-resolution time series. EGU General Assembly 2023, EGU23-1840. https://doi.org/10.5194/egusphere-egu23-1840
  10. Haehnel P, TC Rasmussen, GC Rau (2023) Technical note: Removing dynamic sea-level influences from groundwater-level measurements. Hydrology and Earth System Sciences, https://doi.org/10.5194/hess-2023-54
  11. Qi ZY, Shi SM, TC Rasmussen (2023) Time- and frequency-domain determination of aquifer hydraulic properties using water-level responses to natural perturbations: A case study of the Rongchang Well, Chongqing, southwestern China. Journal of Hydrology, 617(A):128820. https://doi.org/10.1016/j.jhydrol.2022.128820
  12. He GR, Shi ZM, TC Rasmussen, Qi ZY (2023) Fault zone hydraulic parameter estimation by passive methods using natural forces. Water Resources Research, 59:e2022WR033377. https://doi.org/10.1029/2022WR033377
  13. Qi ZY, Shi ZM, TC Rasmussen, Guo HM, Wang GC (2024) Investigating the representative of aquifer transmissivity determined by passive response methods: A comparison with time-dependent hydraulic parameters inferred from different stages of pumping tests. Water Resources Research, e2022WR033952. https://doi.org/10.1029/2022WR033952

Subsurface Hydrology

  1. Rasmussen TC, SC Rhodes (1994) Energy-related methods: Psychrometers. In: LG Wilson, L Everett, S Cullen [editors] (1994) Handbook of Vadose zone characterization and monitoring; Principles, methods and case studies, 21:1-13, Lewis Publishers. ISBN: 9780203752524. https://doi.org/10.1201/9780203752524
  2. Kitchens S, TC Rasmussen (1995) Hydraulic evidence for vertical flow from Okefenokee Swamp to the underlying Floridan Aquifer in Southeast Georgia. 1995 Georgia Water Resources Conference, Proceedings, Athens GA, p. 156-157. GWRC1995a.pdf
  3. Bennett CB, JK Reed, AC Bruns, TC Rasmussen (1996) Real and perceived sources of gradient calculation error in the Savannah River Site Groundwater Monitoring Program. International Topical Meeting on Nuclear and Hazardous Waste Management, Proceedings, American Nuclear Society,, Seattle WA, p. 1138-1145.
  4. Reed JK, CB Bennett, AC Bruns, TC Rasmussen (1996) Shared benefits of an ERDA Task: The Savannah River Site and University of Georgia at Athens. International Topical Meeting on Nuclear and Hazardous Waste Management, Proceedings, American Nuclear Society, Seattle WA, p. 1636-1643.
  5. Rasmussen TC (1996) Overcoming diffusion-limited processes using enhanced advective fields. Emerging Technologies in Hazardous Waste Management, Proceedings, American Chemical Society, Atlanta GA.
  6. Burkingstock BK, PB Bush, YC Berisford, JF Dowd, JB Feild, WW Johnson, TC Rasmussen, JW Taylor (1997) Predicting the fate of Imidacloprid in a coastal plain setting using VS2DT. 1997 Georgia Water Resources Conference, Proceedings, Athens GA p. 508-511. GWRC1997b.pdf
  7. Rasmussen TC, J Reed, J Bollinger (1998) A Decision-Tree methodology for Source Water Assessment and Protection. Source Water and Protection 98, Proceedings, Dallas TX, p. 39-45.
  8. Rasmussen TC, RH Baldwin Jr., JF Dowd, AG Williams (2000) Tracer vs. pressure wave velocities through unsaturated saprolite. Soil Science Society of America Journal, 64(1):75-85. https://doi.org/10.2136/sssaj2000.64175x
  9. Holmbeck-Pelham SA, TC Rasmussen, LA Fowler (2000) Regulation of injected ground water tracers. Ground Water 38(4):541-549. https://doi.org/10.1111/j.1745-6584.2000.tb00247.x
  10. Radcliffe DE, TC Rasmussen (2001) Soil water movement. In: AW Warrick AW [editor] (2001) Soil physics companion, 4:1-42, CRC Press. ISBN: 978-0429123870 https://doi.org/10.1201/9781420041651
  11. Mathes SE, TC Rasmussen (2001) GIS modeling of ground-water contamination at the Savannah River Site. 2001 Georgia Water Resources Conference, Proceedings, Athens GA, p. 594-596. GWRC2001d.pdf
  12. Young MH, TC Rasmussen, FC Lyons, KD Pennell (2002) Optimized system to improve pumping rate stability during aquifer tests. Ground Water, 40(6):629-637. https://doi.org/10.1111/j.1745-6584.2002.tb02549.x
  13. Rasmussen TC, KG Haborak, MH Young (2003) Estimating aquifer hydraulic properties using sinusoidal pumping at the Savannah River Site, South Carolina, USA. Hydrogeology 11:466-482. https://doi.org/10.1007/s10040-003-0255-7
  14. Rasmussen TC (2005) Deep soil-water movement. In:JH Lehr, J Keeley [editors] (2005) Water Encyclopedia, 5:471-473. https://doi.org/10.1002/047147844X.gw846
  15. Mathes SE, TC Rasmussen (2006) Combining multivariate statistical analysis with geographic information systems mapping: a tool for delineating groundwater contamination. Hydrogeology Journal 14:1493-1507. https://doi.org/10.1007/s10040-006-0041-4
  16. Belk EL, D Markewitz, TC Rasmussen, EJM Carvalho, DC Nepstad, EA Davidson (2007) Modeling the effects of throughfall reduction on soil water content in a Brazilian Oxisol under a moist tropical forest. Water Resources Research, 43:W08432. https://doi.org/10.1029/2006WR005493
  17. Zhu X, Risse LM, McCutcheon SC, Tollner EW, Rasmussen TC, West LT (2010) Laboratory investigation of rill erosion on compost blankets under concentrated flow conditions. Transactions ASABE 53(4):1077-1086. https://doi.org/10.13031/2013.32598
  18. Bollinger JS, TC Rasmussen [co-chairs] (2010) Evaluation of subsurface radionuclide transport at commercial nuclear power plants. ANSI/ANS-2.17-2010 (R2016, R2021), American Nuclear Society, La Grange Park IL. https://store.accuristech.com/ans/standards/ans-2-17-2010-r2016?product_id=1848216
  19. Depner JS, TC Rasmussen (2016) Hydrodynamics of time-periodic groundwater flow: Diffusion waves in porous media. American Geophysical Union, Geophysical Monograph 224, 324 pp. ISBN 978-1-119-13394-0 https://doi.org/10.1002/9781119133957
  20. Lundy DA, JF Dowd, TC Rasmussen (2017) Historical trend testing of a mass-balance method for LNAPL body stability at Bemidji, MN. Fourth International Symposium on Bioremediation and Sustainable Environmental Technologies, Miami FL.
  21. Lundy DA, JF Dowd, TC Rasmussen (2017) Field trials for periodic slug testing for LNAPL and aquifer parameters. Fourth International Symposium on Bioremediation and Sustainable Environmental Technologies, Miami FL.
  22. Thomas M, A Milewski, W Seyoum, TC Rasmussen (2018) Downscaling satellite gravimetry data to identify drawdown patterns in a heavily allocated karst aquifer. American Geophysical Union, Fall Conference.
  23. Rasmussen TC (2019) Soil water. In: PA Maurice [editor] (2019) Encyclopedia of Water: Science, Technology, and Society, John Wiley and Sons. ISBN: 978-1119300755 https://doi.org/10.1002/9781119300762.wsts0111
  24. Rasmussen TC (2019) Deep soil water movement. In: PA Maurice [editor] (2019) Encyclopedia of Water: Science, Technology, and Society, John Wiley and Sons. ISBN: 978-1119300755 https://doi.org/10.1002/9781119300762.wsts0109
  25. Rasmussen TC (2019) Hydraulic head. In: PA Maurice [editor] (2019) Encyclopedia of Water: Science, Technology, and Society, John Wiley and Sons. ISBN: 978-1119300755 https://doi.org/10.1002/9781119300762.wsts0110
  26. Rasmussen TC (2019) Specific gravity. In: PA Maurice [editor] (2019) Encyclopedia of Water: Science, Technology, and Society, John Wiley and Sons. ISBN: 978-1119300755 https://doi.org/10.1002/9781119300762.wsts0112
  27. Rotz R, A Milewski, TC Rasmussen (2020) Transient evolution of inland freshwater lenses: Comparison of numerical and physical experiments. Water, 12:1154. https://doi.org/10.3390/w12041154
  28. Rau GC, MO Cuthbert, VEA Post, D Schweizer, RI Acworth, MS Andersen, P Blum, E Carrara, TC Rasmussen, SM Ge (2020) Future-proofing hydrogeology by revising groundwater monitoring practice. Hydrogeology Journal, m28:2963-2969. https://doi.org/10.1007/s10040-020-02242-7

Lake & Wetland Hydrology

  1. Pruitt B, TC Rasmussen (1994) Review of "Lyon JG (1993) Practical Handbook for Wetland Identification and Delineation. Lewis Publishers, CRC Press, Boca Raton, FL". Forest Science, 40(3):586. https://doi.org/10.1093/forestscience/40.3.586
  2. Zeng XQ, TC Rasmussen (1999) Water quality dynamics in Lake Lanier. 1999 Georgia Water Resources Conference, Athens GA, p. 350-353. GWRC1999d.pdf
  3. Mayhew M, TC Rasmussen, AK Parker (2001) Phosphorus binding by iron-rich soil in the Southeastern Piedmont: Implications for point and non-point sources of phosphorus. 2001 Georgia Water Resources Conference, Proceedings, Athens GA, p. 453-456. GWRC2001e.pdf
  4. Parker AK, TC Rasmussen (2001) Phosphorus cycling in Southeastern Piedmont Lakes: An alternative pathway. 2001 Georgia Water Resources Conference, Proceedings, Athens GA, p. 457-460. GWRC2001f.pdf
  5. Parker AK, TC Rasmussen, MB Beck (2003) The role of transported sediment in the cycling of phosphate in Georgia Piedmont impoundments. 2003 Georgia Water Resources Conference, Proceedings, Athens GA. GWRC2003a.pdf
  6. Zeng X, TC Rasmussen (2005) Multivariate statistical characterization of water quality in Lake Lanier, Georgia, USA. Journal of Environmental Quality, 34:1980-1991. https://doi.org/10.2134/jeq2004.0337
  7. Zeng X, TC Rasmussen, MB Beck, AK Parker, ZL Lin (2006) A biogeochemical model for metabolism and nutrient cycling in a Southeastern Piedmont impoundment. Environmental Modelling & Software 21(8):1073-1095. https://doi.org/10.1016/j.envsoft.2005.05.009
  8. Ceballos EL, TC Rasmussen (2007) Internal loading in Southeastern Piedmont impoundments. 2007 Georgia Water Resources Conference, Proceedings, Athens GA, p. 599-602. GWRC2007b.pdf
  9. Little E, LM Risse, V Nzengung, TC Rasmussen, T Sherrell (2009) Remediation processes in a State Botanical Garden wetland impacted by agricultural nutrient loading. 2009 Georgia Water Resources Conference, Proceedings, Athens GA. GWRC2009d.pdf
  10. Rasmussen TC, E Ceballos (2009) The effects of sediment removal on internal nutrient cycling and eutrophication in Lake Allatoona. 2009 Georgia Water Resources Conference, Proceedings, Athens GA. GWRC2009a.pdf
  11. Deemy JB, J Hepinstall-Cymerman, LK Kirkman, N. Nibbelink, TC Rasmussen (2013) Spatial modeling of biologically relevant subsurface hydrologic connectivity between isolated wetlands and jurisdictional surface waters in the Dougherty Plain, Georgia. 2013 Georgia Water Resources Conference, Proceedings, Athens GA.
  12. Deemy JB, J Hepinstall-Cymerman, LK Kirkman, TC Rasmussen (2015) Water quality of episodic flow through isolated wetlands embedded in a Long Leaf Pine / Wiregrass Ecosystem. 2015 Georgia Water Resources Conference, Proceedings, Athens GA. GWRC2015b.pdf"
  13. Ignatius AR, TC Rasmussen (2016) Small reservoir effects on headwater water quality in the rural-urban fringe, Georgia Piedmont, USA. Journal of Hydrology: Regional Studies, 8:145-161. https://doi.org/10.1016/j.ejrh.2016.08.005
  14. Deemy JB, TC Rasmussen (2017) Hydrology and water quality of isolated wetlands: Stormflow changes along two episodic flowpaths. Journal of Hydrology: Regional Studies, 14:23-36. https://doi.org/10.1016/j.ejrh.2017.10.001
  15. Deemy JB, TC Rasmussen (2017) Predicting episodic storm flows through a longleaf pine / wiregrass forest on the Dougherty Plain, southwest Georgia. 2017 Georgia Water Resources Conference, Proceedings, Athens GA. GWRC2017a.pdf
  16. Deemy JB, CL Keogh, TC Rasmussen (2017). Assessment of learning objective achievement by the Watershed UGA: "Introduction to Watersheds" module. 2017 Georgia Water Resources Conference, Proceedings, Athens GA. GWRC2017f.pdf
  17. Deemy JB, J Hepinstall-Cymerman, LK Kirkman, TC Rasmussen (2017) Water quality of thirty-one isolated wetlands embedded in a longleaf pine / wiregrass ecosystem regarding connectivity to episodic flows generated from agricultural runoff. Geological Society of America, Southeastern Section meeting, Richmond VA.
  18. Deemy JB, J Hepinstall-Cymerman, LK Kirkman, TC Rasmussen (2017) Hydrologic description of thirty-one isolated wetlands embedded in a longleaf pine / wiregrass forest: Influence of connectivity to reference condition and agricultural storm runoff. Geological Society of America, Southeastern Section meeting, Richmond VA.
  19. Rasmussen TC, JB Deemy, LS Long (2017) Wetland hydrology. In: CM Finlayson, M Everard, K Irvine, R McInnes, B Middleton, A van Dam, NC Davidson [editors] (2017) The Wetland Book. I: Structure and Function, Management and Methods, 27:201-216. https://doi.org/10.1007/978-90-481-9659-3_71
  20. Wang C, KK Takagi, JB Deemy, TC Rasmussen (2019) Assessing coliform ratios in depressional wetlands as potential indicators of hydrologic connectivity. 2019 Georgia Water Resources Conference, Proceedings, Athens GA. GWRC2019c.pdf
  21. Deemy JB, TC Rasmussen (2019) Hydrologic connectivity of isolated wetlands: Episodic flows. In: PA Maurice [editor] (2019) Encyclopedia of Water: Science, Technology, and Society, John Wiley and Sons. ISBN: 978-1119300755 https://doi.org/10.1002/9781119300762.wsts0124
  22. Rasmussen TC, JL Shelton, GR Hopkins (2019) Improving cold-water fish habitat below impoundments using modified discharge structures. 2019 Georgia Water Resources Conference, Proceedings, Athens GA. GWRC2019a.pdf
  23. Deemy JB, KK Takagi, RL McLachlan, TC Rasmussen, SG Wright, KN Tyler, MG Garner (2022) Hydrology, geomorphology, and soils: An overview. In: T Dalu, RJ Wasserman [editors] (2022) Fundamentals of Tropical Freshwater Wetlands: From Ecology to Conservation Management, 3:43-86. https://doi.org/10.1016/B978-0-12-822362-8.00030-X
  24. Deemy JB, BM Hall, KK Takagi, KN Tyler, TC Rasmussen (2022) Physicochemical environment. In: T Dalu, RJ Wasserman [editors] (2022) Fundamentals of Tropical Freshwater Wetlands: From Ecology to Conservation Management, 4:87-109. https://doi.org/10.1016/B978-0-12-822362-8.00022-0
  25. Zeng W, Y Zhang, B Couch, TC Rasmussen (2009) Incorporating the cold-water pool in Lake Lanier conservation storage management. 2009 Georgia Water Resources Conference, Proceedings, Athens GA. GWRC2009b.pdf
  26. Ignatius AR, TC Rasmussen (2015) Small reservoir impacts on stream water quality in agricultural, developed, and forested Watersheds: Georgia Piedmont, USA. 2015 Georgia Water Resources Conference, Proceedings, Athens GA. GWRC2015a.pdf
  27. Saintil T, A Kannan, DE Radcliffe, TC Rasmussen, M Habteselassie, J Calabria (2016) Targeting the sources of fecal contamination using dog-, human-, and ruminant-specific markers in the Lake Herrick Watershed, Georgia. American Geophysical Union, Fall Meeting, San Francisco CA. 2016AGUFM.H23A1522S
  28. Kannan A, T Saintil, DE Radcliffe, TC Rasmussen (2017) Water quality monitoring to restore and enhance Lake Herrick. American Geophysical Union, Fall Meeting, New Orleans LA. 2017AGUFM.H13B1359K
  29. Kannan A, T Saintil, DE Radcliffe, TC Rasmussen (2017) Water quality monitoring to restore and enhance Lake Herrick. 2017 Georgia Water Resources Conference, Proceedings, Athens GA. GWRC2017c
  30. Kannan A, T Saintil, DE Radcliffe, TC Rasmussen (2017) Water quality monitoring to restore and enhance Lake Herrick. SERA-17: Innovative Solutions to Minimize Phosphorus Losses from Agriculture, Maumee Bay State Park OH.
  31. Shelton JJ, TC Rasmussen, GR Hopkins (2019) Improving fish habitat below impoundments using alternative discharge structures. 2019 Georgia Water Resources Conference, Proceedings, Athens GA.
  32. Kannan A, DE Radcliffe, TAP Saintil, TC Rasmussen (2019) Tracking and managing nonpoint source pollution at Lake Herrick Watershed, Athens, Georgia. 2019 Georgia Water Resources Conference, Proceedings, Athens GA. GWRC2019d.pdf

Residential Water Demand & Green Roofs

  1. Woodard GC, TC Rasmussen (1984) Residential water demand: A micro analysis using survey data. Hydrology and Water Resources in Arizona and the Southwest, Proceedings of the AAAS and AWRA - Arizona Chapter, 14:9-20. http://hdl.handle.net/10150/296097
  2. Woodard GC, TC Rasmussen (1984) Models of indoor and outdoor water demand for single family residences in Tucson, Arizona. Hydrology and Water Resources in Arizona and the Southwest, Proceedings of the American Association for the Advancement of Science (AAAS) and American Water Resources Association - Arizona Chapter, 13:67-74. http://hdl.handle.net/10150/296074
  3. Carter TL, TC Rasmussen (2005) Use of Green Roofs for ultra-urban stream restoration in the Georgia Piedmont (USA). 2005 Georgia Water Resources Conference, Proceedings, Athens GA, p. 612-616. GWRC2005b.pdf
  4. Carter TL, TC Rasmussen (2006) Hydrologic behavior of vegetated roofs. Journal of the American Water Resources Association 42(5):1261-1274. https://doi.org/10.1111/j.1752-1688.2006.tb05299.x
  5. Carter TL, TC Rasmussen, CR Jackson, A Keeler, L Fowler, JL Meyer, D Gattie (2007) Vegetated roofs: Performance and policy in Athens, GA. 2007 Georgia Water Resources Conference, Proceedings, Athens GA, p. 218-221. GWRC2007d