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Peter Knappett
Peter Knappett
(979) 845-2006
(979) 845-6162
Halbouty 254

Texas A&M University

Department of Geology & Geophysics

MS 3115

College Station, TX 77843


PhD, Earth & Planetary Sciences, University of Tennessee at Knoxville, 2010

Masters of Applied Science, Civil Engineering, University of Waterloo, 2006

Honours Bachelor of Science, Earth Science Minor, University of Waterloo, 2001

  • Kohout Early Career Award, Hydrogeology Division, Geological Society of America, 2014
  • H. Gordon Award for Exceptional Professional Promise, Earth & Planetary Sciences, UT, 2010
  • Interdisciplinary Research Award, Earth & Planetary Sciences, UT, 2009

Scientific Writing, GEOL 311           

Environmental Geology, GEOL 420

Hydrogeology, GEOL 410 

Advanced Hydrogeology  GEOL 614

Field Methods in Hydrogeology, GEOL 610

Groundwater – Surface Water Interactions, GEOL 689

Peter Knappett

Assistant Professor

Research Interests

Groundwater exploitation in the 20th century has allowed humans to grow crops and cities in the middle of deserts. All of that pumping, combined with human activities on the surface and within the subsurface, may have unforeseen consequences on the quality of the water that remains for future generations. I’m interested in predicting the impacts of intensive groundwater pumping on regional groundwater quality. This includes regions with problems with naturally occurring, toxic concentrations of arsenic and fluoride, and regions with anthropogenic contamination at the surface. I’m also interested in how dynamic interactions between rivers and aquifers change the supply and biochemical composition of both. Often, the regions I work in lack reliable geological, geospatial, water level, pumping, and chemical data. Therefore I am often collecting primary field data, and visualizing, modeling and interpreting it using custom software.

Research Themes

  • Vulnerability of Regional Drinking Water Aquifers
  • Groundwater-Surface Water Interactions
  • Hydrogeochemistry
  • Tracers in Hydrology
  • Particle Transport in Porous Media

Selected Publications

  1. Berube, M.; Jewell, K.; Myers, K.; Knappett, P. S. K.; Shuai, P.; Hossain, A.; Lipsi, M.; Hossain, S.; Hossain, A.; Peterson, J.; Ahmed, K. M.; Datta, S. The fate of arsenic in groundwater discharged to the Meghna River, Bangladesh. Environmental Chemistry Journal, In Press.
  2. Huang, Y.; Zhan, H.; Knappett, P. S. K. A Novel Analytical Solution for Estimating Aquifer Properties within a Horizontally Anisotropic Aquifer Bounded by a Stream. Journal of Hydrology, Vol. 559, pp. 920-931, 2018. DOI: 10.1016/j.jhydrol.2018.03.014
  3. Knappett, P. S. K.; Li, Y.; Hernandez, H.; Rodriguez, R.; Aviles, M.; Deng, C.; Pina, V.; Giardino, J. R.; Mahlknecht, J.; Datta, S. Changing Recharge Pathways within an Intensively Pumped Aquifer With High Fluoride Concentrations in Central Mexico. Science of the Total Environment, Vol. 622-623, pp. 1029-1045, 2018. DOI: 10.1016/j.scitotenv.2017.12.031
  4. Rhodes, K. A.; Proffitt, T.; Rowley, T.; Knappett, P. S. K.; Montiel, D.; Dimova, N.; Tebo, D.; G. R. Miller. The importance of bank storage in supplying baseflow to rivers flowing through compartmentalized, alluvial aquifers. Water Resources Research, 2017. DOI: 10.1002/2017/WR021619
  5. Herzyk, A.; Fillinger, L.; Larentis, M.; Qiu, S.; Maloszweski, P.; Hunniger, M.; Schmidt, S. I.; Stumpp, C.; Marozava, S.; Knappett, P. S. K.; Kaschuba, S.; Lueders, T.; Elsner, M.; Meckenstock, R.; #Griebler, C. Response and recovery of a pristine groundwater ecosystem impacted by toluene contamination – a meso-scale indoor aquifer experiment. Journal of Contaminant Hydrology, Vol. 207, pp. 17-30, 2017. DOI: 10.1016/j.jconhyd.2017.10.004
  6. Shuai, P.; Knappett, P.; Hossain, S.; Hosain, A.; Rhodes, K.; Ahmed, K. M.; Cardenas, M. B. The impact of the degree of aquifer confinement and anisotropy on tidal pulse propagation. Ground Water. Vol. 55, No. 4, 2017. DOI: 1111/gwat.12509.
  7. Shuai, P.; Cardenas, M. B.; Knappett, P. S. K.; Bennett, P. C.; Nelson, B. T. Denitrification in the banks of fluctuating rivers: the effects of river stage amplitude, sediment hydraulic conductivity and dispersivity, and ambient groundwater flow. Water Resources Research, Vol. 53, No. 9, pp. 7951-7967, 2017. DOI: 10.1002/2017WR020610
  8. Khan, M.; Koneshloo, M.; Knappett, P. S. K.; Ahmed, K. M.; Bostick, B. C.; Mailloux, B. J.; Mozumder, R. H.; Zahid, A.; Harvey, C. F.; van Geen, A.; Michael, H. A. Mega-city pumping in fluvio-deltaic aquifer creates complex vulnerability of arsenic-safe groundwater to contamination. Nature Communications, 7, No. 12833, 2016. DOI: 10.1038/NCOMMS12833
  9. Knappett, P. S. K.; Mailloux, B. J.; Choudhury, I.; Khan, M. R.; Michael, H. A.; Barua, S.; Mondal, D. R.; Steckler, M. S.; Akhter, S. H.; Ahmed, K. M.; Bostick, B.; Harvey, C. F.; Shamsudduha, M.; Mihajlov, I.; Mozumder, R.; van Geen, A. Vulnerability of Low-Arsenic Aquifers to Municipal Pumping in Bangladesh. Journal of Hydrology. Vol. 539, pp. 674-686, 2016. DOI: 10.1016/j.hydrol.2016.05.035
  10. Choudhury, I., Ahmed, K. M., Hasan, M., Mozumder, M. R. H., Knappett, P. S. K., Ellis, T., A. van Geen. Evidence for Elevated Levels of Arsenic in Public Wells of Bangladesh due to Improper Installation. Ground Water, Vol. 54, No. 6, pp. 871-877, 2016. DOI: 10.1111/gwat.12417.
  11. Knappett, P. S. K.; Du, J.; Liu, P.; Horvath, V.; Mailloux, B. J.; Feighery, J.; van Geen, A.; Culligan, P. J. Importance of Reversible Attachment in Predicting coli Transport in Saturated Aquifers from Column Experiments. Advances in Water Resources, Vol. 63, pp. 120-130, 2014. DOI: 10.1016/j.advwatres.2013.11.005
  12. Qiu, S.; Eckert, D.; Cirpka, O. A.; Hunninger, M.; Knappett, P.; Maloszewski, P.; Meckenstock, R.; Griebler, C.; Elsner, M. Sorption, diffusion-dispersion, or biodegradation? – Carbon isotope analysis of a transient toluene pulse passing through a mesoscale aquifer, Environmental Science & Technology, Vol. 47, No. 13, pp. 6892-6899, 2013. DOI: 10.1021/es304877h
  13. Escamilla, V.; Knappett, P. S. K.; Yunus, M.; Streatfield, P. K.; Emch, M. Influence of Latrine Proximity and Type on Tubewell Water Quality and Diarrheal Disease in Bangladesh. Annals of the Association of American Geographers, Vol. 103, No. 2, pp. 1-9, 2013. DOI: 10.1080/00045608.2013.756257
  14. Knappett, P. S. K.; McKay, L. D.; Layton, A.; Williams, D. E.; Alam, Md. J.; Mailloux, B. J.; Ferguson, A. F.; Culligan, P. J.; Serre, M. L.; Emch, M.; Ahmed, K. M.; Sayler, G. S.; van Geen, A. Unsealed Tubewells Lead to Fecal Contamination of Drinking Water in Bangladesh. Journal of Water & Health, Vol. 10, No. 4, pp. 565-578, 2012. DOI: 10.2166/wh.2012.102
  15. Ferguson, A. S.; Layton, A. C.; Mailloux, B. J.; Culligan, P. J.; Williams, D. E.; Smartt, A. E.; Sayler, G. S; Feighery, J.; McKay, L. D.; Knappett, P. S. K.; Alexandrova, E.; Arbit, T.; Emch, M.; Escamilla, V.; Ahmed, K. M.; Alam, Md., J.; Streatfield, P. K.; Yunus, Md.; van Geen, A. Comparison of Fecal Indicators with Pathogenic Bacteria and Rotavirus in Groundwater. Science of the Total Environment, Vol. 431, pp. 314-322, 2012. DOI: 10.1016/j.scitotenv.2012.05.060
  16. Knappett, P. S. K.; McKay, L. D.; Layton, A.; Williams, D. W.; Mailloux, B. J.; Alam, Md. J.; Huq, Md. R.; Mey, J.; Feighery, J. E.; Culligan, P. J.; Mailloux, B. J.; Zhuang, J.; Escamilla, V.; Emch, M.; Perfect, E.; Sayler, G. S.; Ahmed, K. M.; van Geen, A. Implications of Fecal Bacteria Input from Latrine-Polluted Ponds for Wells in Sandy Aquifers. Environmental Science & Technology, Vol. 46, No. 3, pp. 1361-1370, 2012. DOI: 10.1021/es202773w
  17. Wu, J.; van Geen, A.; Ahmed, K. M.; Akita, Y.; Alam, M. J.; Culligan, P. J.; Escamilla, V.; Feighery, J.; Ferguson, A. S.; Knappett, P. S. K.; Mailloux, B. J.; McKay, L. D.; Serre, M. L.; Streatfield, P. K.; Yunus, M.; Emch, M. Increase in diarrheal disease associated with arsenic mitigation in Bangladesh. PLoS ONE, Vol. 6, No. 12, pp. e29593, 2012. DOI: 10.1371/journal.pone.0029593
  18. Knappett, P. S. K.; Escamilla, V.; Layton, A.; McKay, L. D.; Emch, M.; Williams, D. E.; Huq, M. R.; Alam, M. J.; Farhana, L.; Mailloux, B. J.; Ferguson, A.; Sayler, G. S.; Ahmed, K. M.; van Geen, A. Impact of population and latrines on fecal contamination of ponds in rural Bangladesh. Science of the Total Environment, Vol. 409, No. 17, pp. 3174-3182, 2011. DOI: 10.1016/j.scitotenv.2011.04.043
  19. van Geen, A.; Ahmed, K. M.; Akita, Y.; Alam, M. J.; Culligan, P. J.; Feighery, J.; Ferguson, A.; Emch, M.; Escamilla, V.; Knappett, P.; Layton, A. C.; Mailloux, B. J.; McKay, L. D.; Mey, J. L.; Serre, M. L.; Streatfield, P. K.; Wu, J.; Yunus, M. Seasonal contamination of shallow tubewells in Bangladesh with the fecal indicator coli: Impacts of population density and hydrogeology. Environmental Science & Technology, Vol. 45, No. 7, pp. 1199-1205, 2011. DOI: 10.1021/es103192b
  20. Knappett, P. S. K.; Layton, A.; McKay, L. D.; Williams, D.; Mailloux, B. J.; Huq, M. R.; Alam, M. J.; Ahmed, K. M.; Akita, Y.; Serre, M. L.; Sayler, G. S.; van Geen, A. Efficacy of Hollow-Fiber Ultrafiltration for Microbial Sampling in Groundwater. Ground Water, Vol. 49, No. 1, pp. 53-65, 2011. DOI: 10.1111/j.1745-6584.2010.00712.x
  21. Mailloux, B.; Alexandrova, E.; Keimowitz, A.; Wovkulich, K.; Freyer, G.; Herron, M.; Stolz, J.; Kenna, T.; Pichler, T.; Polizzotto, M.; Dong., H.; Bishop, M.; Knappett, P. S. K.; Microbial Mineral Weathering for Nutrient Acquisition Releases Arsenic. Applied & Environmental Microbiology, Vol. 75, No. 8, pp. 2558-2565, 2009. DOI: 10.1128/AEM.02440-07
  22. Knappett, P. S. K.; Emelko, M.; Zhuang, J.; McKay, L. Transport and Retention of MS-2 Bacteriophage and Bacteria-Sized Microspheres in Angular Saturated Porous Media: Impact of Ionic Strength and Grain Size. Water Research, Vol. 42, No. 16, pp. 4368-4378, 2008. DOI: 10.1016/j.watres.2008.07.041

Additional Information


Assistant Professor, Dept. of Geology & Geophysics, Texas A&M University, 2013 – Present

Associate Research Scientist, Lamont-Doherty Earth Observatory, Columbia University, 2013

Post-doctoral Research Scientist, Lamont-Doherty Earth Observatory, Columbia University, 2012

Marie Curie Post-doctoral Research Fellow, Helmholtz Center for Environmental Health, Germany, 2010-2011

Graduate Research Assistant, Dept. of Earth & Planetary Sciences, University of Tennessee, 2006 – 2010

Graduate Research Assistant, Dept. of Civil Engineering, University of Waterloo, Canada, 2003-2005

Project Hydrogeologist, Conestoga-Rovers & Associates, Waterloo, Canada, 2002-2003

Visiting Scientist, UFZ Center for Environmental Research, Leipzig, Germany, 2001-2002


"Overpumping can taint groundwater, Texas A&M professor says" - The Eagle

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