Welcome!

My research program is focused on sustainability science through the evaluation of hydrologic interfaces.  The implementation of this research agenda has involved the evaluation of highly localized systems and more broad scale watershed processes.  Please feel free to contact me with questions about my research program and the multi-disciplinary teams with which I participate.

University of Tennessee Research Partnerships

The Center for Environmental Biotechnology

Southeastern Water Resources Institute

Tennessee Water Resources Research Center

The Institute for a Secure and Sustainable Environment

Select Journal Publications

1. Perfect, E., Gentry, R.W., Sukop, M.C., and Lawson, J.L. 2006. Multifractal Sierpinski Carpets: Theory and Application to Modeling Reservoir Heterogeneity, Geoderma, V134, n3-4, pp. 240-252.
2. Goff, K. and Gentry, R.W. 2006. A Sensitivity Analysis of the Influence of Watershed and Development Characteristics on the Cumulative Impacts of Storm Water Detention Ponds, Water Resources Management, V20, n6, pp. 829-860.
3. Layton, A.C., Williams, D., Garrett, V., McKay, L., Gentry, R.W. and Sayler, G.S. 2006. Development of Bacteroides 16S rRNA Gene TaqMan-Based Real-Time PCR Assays for Estimation of Total, Human, and Bovine Fecal Pollution in Water, Applied and Environmental Microbiology, V72, n6, pp. 4214-4224.
4. Gentry, R.W., Ku, T-L., Luo, S., Todd, V., Larsen, D., and McCarthy, J.F. 2006. Resolving Aquifer Behavior Near a Focused Recharge Feature Based Upon Synoptic Wellfield Hydrogeochemical Tracer Results, Journal of Hydrology, V323, n1-4, pp387-403.
5. Gentry, R.W., McCarthy, J., Layton, A., McKay, L., Williams, D., Koirala, S.R., and Sayler, G.S. 2006. Escherichia coli Loading at or Near Baseflow in a Mixed-Use Watershed, Journal of Environmental Quality, V35, n6, pp. 2244-2249.
6. Gentry, R.W., Layton, A., McKay, L., McCarthy, J., Williams, D., Koirala, S.R., and Sayler, G.S. 2007. Efficacy of Bacteroides measurements for Reducing the Statistical Uncertainty Associated with Hydrologic Flow and Fecal Loads in a Mixed Use Watershed, Journal of Environmental Quality, V36, n5, pp. 1324-1330.
7. Koirala, S.R., Gentry, R.W., Perfect, E., Schwartz, J., and Sayler, G.S. 2008. Temporal Variation and Persistence of Bacteria in Streams, Journal of Environmental Quality, 37(4):1559–1566, doi:10.2134/jeq2007.0310.
8. Koirala, S. R., E. Perfect, R. W. Gentry, and J. W. Kim.  2008. Effective saturated hydraulic conductivity of two-dimensional random multifractal fields, Water Resour. Res., 44, W08410, doi:10.1029/2007WR006199.
9. Ivey, S.S., Gentry, R.W., Larsen, D., and Anderson, J.L. 2008. Inverse Application of Age-distribution Modeling using Environmental Tracers ³H/³He, ASCE Journal of Hydrologic Engineering, v13, n11, pp1002-1010.
10. Ivey, S.S., Gentry, R.W., Larsen, D., and Anderson, J.L. 2008. Case Study of the Sheahan Wellfield Using ³H/³He Field Data to Determine Localized Leakage Areas, ASCE Journal of Hydrologic Engineering, v13, n11, pp1011-1020.
11. Franklin, S.B., Kupfer, J.A., Pezeshki, R., Gentry, R.W., and Smith, R.D. 2009. Efficacy of the Hydrogeomorphic Model (HGM): A Case Study from Western Tennessee, Ecological Indicators, v9, n2, pp267-283, doi:10.1016/j.ecolind.2008.05.004.
12. Bell, A., Layton, A., McKay, L.D., Williams, D., Gentry, R.W., and Sayler, G.S. 2009. Factors Influencing the Persistence of Fecal Bacteroides in Stream Water, Journal of Environmental Quality, v38, pp1-9, doi:10.2134/jeq2008.0258.

Randy Gentry, Gary Sayler and Jie Zhuang in China near the Yellow Mountains.