Lynn Gelhar

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Lynn Walter Gelhar (born 1936) is an American civil engineer focusing in hydrology and is currently Professor Emeritus at Massachusetts Institute of Technology. [1] [2] He is recognized for pioneering research in stochastic subsurface hydrology, has leading research in the area of field-scale contaminant transport experiments, and has extensive experience on the hydrologic aspects of nuclear waste disposal.

Contents

Background

Gelhar was born in 1936 in the central Wisconsin sand country ( A Sand County Almanac ) [3] [4] . He grew up in the small agricultural village of Oakfield, Wisconsin located at the foot of the Niagara Escarpment, graduating from Oakfield High School in 1954. He studied Civil Engineering at the University of Wisconsin, specializing at the graduate level in hydrology and fluid mechanics, with minors in mathematics and meteorology; his doctorate was completed in 1964. During his graduate study he also worked with the Soil Conservation Service(USDA) on design of water control structures and at Fairbanks-Morse & Co. on large pumping systems for flood control and water supply projects.

In 1964 he joined the faculty of the Department of Civil Engineering at the Massachusetts Institute of Technology (MIT) as an Assistant Professor, and was promoted to Associate Professor in 1969. In 1973 he joined the faculty of the Geoscience Department at the New Mexico Institute of Mining and Technology (NMT); as Professor of Hydrology he coordinated of the graduate program in hydrology. In 1983 he returned to MIT as full Professor, and retired in 1996, becoming Professor Emeritus while continuing to direct graduate student research. Sabbatical leaves included visits at Stanford University (1971), Karlsruhe Institute of Technology (1978), Ecole des Mines de Paris (1978), Royal Institute of Technology (KTH, Stockholm) (1986), Swiss Federal Institute of Technology in Zurich (1986), University of Western Australia and the Commonwealth Scientific and Industrial Research Organization (Perth) (1987), Lawrence Berkeley Laboratory (1993) and King Abdulaziz University (KAU), Jeddah, (2012).

Research

Gelhar is recognized as a leading authority on stochastic subsurface hydrology. In 1982 he received the American Geophysical Union's Horton Award [5] in recognition of his pioneering work in stochastic subsurface hydrology, in 1983 was elected a Fellow [6] in the American Geophysical Union, cited particularly for work in stochastic methods, and in 1987 he was the recipient of the O. E. Meinzer Award [7] by the Geological Society of America for three papers dealing with stochastic methods. He is the author of the textbook Stochastic Subsurface Hydrology [8] (1993), and has authored 160 technical publications. He has broad experience in fundamental and applied water-related research, but is best known for his theoretical work describing contaminant transport in naturally heterogenous aquifers using stochastic methods. [9] He has also been instrumental in developing large-scale long-term field experiments designed to evaluate the new theoretical results, including field sites on Cape Cod, [10] near Columbus, Mississippi, [11] and a vadose zone site in the New Mexico desert near Las Cruces. [12] His review of worldwide data on field-scale dispersion in aquifers [13] is frequently cited in applied investigations aquifer contamination. His publications are widely cited, as reflected by his inclusion in the 2001 ISI Highly Cited list of scientists in Engineering and in Ecology/Environment. [14] In Google Scholar he is credited with more than 16,000 citations, being the most highly cited individual in the field of Groundwater Hydrology. [15]

Professional activities

Gelhar has experience in public service and consulting with government and industry on aspects of groundwater hydrology, dealing particularly with hazardous and nuclear waste issues. He has served on several multidisciplinary review teams, including groups reviewing environmental aspects of the Hanford Site in Washington, and the WIPP nuclear waste disposal site in New Mexico. At the WIPP site regional groundwater conditions may make the site susceptible to localized salt dissolution [16] [17] [18] [19] [20] and associated features like breccia pipes and sinkholes, [21] which could compromise the long-term stability of the site. Such uncertainties are intertwined with the complex politics of WIPP. [22] For the nuclear weapons test site in Nevada, he chaired a panel reviewing groundwater modeling for that region of southwestern Nevada as part of an assessment of groundwater contamination effects from underground weapons testing. [23] [24] At the Hanford site in Washington he was involved in hydrologic aspects of the high-level nuclear waste facility that was proposed in the basalt [25] [26] and was a member of a panel reviewing science and technology of Hanford environmental cleanup. [27] At Hanford there is a unique threat to the long-term stability of waste disposal facilities associated with the potential for mega floods with water hundreds of meters deep sweeping over the site, as has happened repeatedly as recently as 13,000 years ago (Missoula Floods). He was a member of a review group that assessed the groundwater conditions at the proposed Yucca Mountain nuclear waste disposal site [28] and has contributed a chapter to a book exploring uncertainties associated with Yucca Mountain. [29] While on sabbatical leaves in France, Switzerland and Sweden he worked with scientists involved in the radioactive waste disposal programs in those countries, in Sweden preparing a report on flow and transport in fractured rocks for their agency dealing with radioactive waste disposal. [30]

Honors and awards

Related Research Articles

<span class="mw-page-title-main">Radioactive waste</span> Unwanted or unusable radioactive materials

Radioactive waste is a type of hazardous waste that contains radioactive material. Radioactive waste is a result of many activities, including nuclear medicine, nuclear research, nuclear power generation, rare-earth mining, and nuclear weapons reprocessing. The storage and disposal of radioactive waste is regulated by government agencies in order to protect human health and the environment.

<span class="mw-page-title-main">Hanford Site</span> Defunct American nuclear production site

The Hanford Site is a decommissioned nuclear production complex operated by the United States federal government on the Columbia River in Benton County in the U.S. state of Washington. The site has been known by many names, including Site W and the Hanford Nuclear Reservation. Established in 1943 as part of the Manhattan Project, the site was home to the Hanford Engineer Works and B Reactor, the first full-scale plutonium production reactor in the world. Plutonium manufactured at the site was used in the first atomic bomb, which was tested in the Trinity nuclear test, and in the Fat Man bomb that was used in the bombing of Nagasaki.

<span class="mw-page-title-main">Yucca Mountain nuclear waste repository</span> Unused deep geological repository facility in Nevada, US

The Yucca Mountain Nuclear Waste Repository, as designated by the Nuclear Waste Policy Act amendments of 1987, is a proposed deep geological repository storage facility within Yucca Mountain for spent nuclear fuel and other high-level radioactive waste in the United States. The site is on federal land adjacent to the Nevada Test Site in Nye County, Nevada, about 80 mi (130 km) northwest of the Las Vegas Valley.

<span class="mw-page-title-main">Hydrogeology</span> Study of the distribution and movement of groundwater

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<span class="mw-page-title-main">Waste Isolation Pilot Plant</span> Deep geological repository for radioactive waste

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<span class="mw-page-title-main">Savannah River Site</span> Nuclear reservation in the US

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<span class="mw-page-title-main">Vadose zone</span> Unsaturated aquifer above the water table

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<span class="mw-page-title-main">Nuclear Waste Policy Act</span>

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References

  1. ↑ "Lynn Gelhar". mit.edu. Retrieved May 10, 2017.
  2. ↑ "Lynn Gelhar" . Retrieved May 10, 2017.
  3. ↑ "Wisconsin Geological & Natural History Survey » 5. Central Sand Plains". wgnhs.uwex.edu. Retrieved 2017-12-27.
  4. ↑ "Wisconsin Geological & Natural History Survey » Mining: Frac sand". wgnhs.uwex.edu. Retrieved 2017-12-27.
  5. 1 2 "Hydrologic Sciences Award - Honors Program". Honors Program. Retrieved 2017-12-27.
  6. 1 2 "Fellow" . Retrieved 2017-12-28.
  7. 1 2 "Past winners - Hydrogeology Division". community.geosociety.org. Retrieved 2017-12-27.
  8. ↑ Gelhar, Lynn W., Stochastic Subsurface Hydrology, Prentice Hall, 390 pp., 1993.
  9. ↑ Gelhar, L.W. and C.L. Axness, Three-Dimensional Stochastic Analysis of Macrodispersion in Aquifers. Water Resources Research, 19(1), 161-180, 1983.
  10. ↑ LeBlanc, D.R., S.P. Garabedian, K.M. Hess, L.W. Gelhar, R.D. Quadri, K.G. Stollenwerk and W.W. Wood, “Large-Scale Natural-Gradient Tracer Test in Sand and Gravel, Cape Cod, Massachusetts: 1. Experimental Design and Observed Tracer Movement,” Water Resources Research, 27(5), 895-910, 1991.
  11. ↑ Boggs, J.M., S.C. Young, L.M. Beard, L.W. Gelhar, K.R. Rehfeldt and E.E. Adams, Field study of dispersion in a heterogeneous aquifer, 1, Overview and site description, Water Resources Research, 28(12), 3281-3292, 1992.
  12. ↑ Wierenga, P. J., R. G. Hills, and D. B. Hudson. 1991. The Las Cruces Trench Site: Characterization, experimental results, and one-dimensional flow predictions. Water Resources Research 27:2695-2705.
  13. ↑ Gelhar, L.W., C. Welty and K.R. Rehfeldt, “A Critical Review of Data on Field Scale Dispersion in Aquifers”, Water Resources Research, 28(7), 1958-1974, 1992.
  14. ↑ "Archived Lists - HCR". clarivate.com. Archived from the original on 2018-05-26. Retrieved 2017-12-27.
  15. ↑ "Profiles". scholar.google.com. Retrieved 2017-12-27.
  16. ↑ “A-Waste Panel Is One-sided” Albuquerque Journal, 5 Sept. 1976, page 19.
  17. ↑ “Geologists Raise Questions on Stability of WIPP Site” Albuquerque Journal, 28 April 1981, page B-2
  18. ↑ “Geologist say WIPP site may be unsuitable” Santa Fe New Mexican, 28 April 1981. page 1
  19. ↑ Anderson, Roger Y., Deep-Seated Salt Dissolution in the Delaware Basin, Texas and New Mexico, New Mexico Geological Society, Special Publication No. 10, 1981, pp. 133-145.
  20. ↑ Chaturvedi, Lokesh and Kenneth Rehfeldt, Groundwater Occurrence and the Dissolution of Salt at the WIPP Radioactive Waste Repository Site, EOS Earth & Space Science News, Vol. 85 No. 31, 1984, pp. 457-459.
  21. ↑ Martinez, Joseph D., Kenneth S. Johnson and James T. Neal, Sinkholes in Evaporite Rocks, American Scientist, Vol. 86, pp. 38-51, 1998.
  22. ↑ McCutcheon, Chuck, NuclearReactions, The Politics of Opening a Radioactive Waste Disposal Site, University of New Mexico Press, 224 pages, 2002.
  23. ↑ Forstenzer, Martin (2000-03-21). "Concerns Arise Over Aquifer Near Nuclear Test Site". The New York Times. ISSN   0362-4331 . Retrieved 2017-12-27.
  24. ↑ Freeze, R.A., L.W. Gelhar, D. Langmuir, S.P. Neuman, F.W. Schwartz, and D. Weber, External Peer Review Group Report on Frenchman Flat Data Analysis and Modeling Task, Underground Test Area Project, Report ITLV/13052-077 prepared under Contract No. DE-AC08-97NV13052, U.S. Department of Energy, September 1999.
  25. ↑ Leonhart, L.S., R.L. Jackson, D.L. Graham, L.W. Gelhar, G.M. Thompson, B.Y. Kanehiro and C.R. Wilson, "Analysis And Interpretation Of A Recirculating Tracer Experiment Performed On A Deep Basalt Flow Top," Bull. Assoc. of Eng. Geol., XXII(3), 259-274, 1985.
  26. ↑ Gelhar, L. W.; Leonhart, L. S. (1982-04-01). "Analysis of Two-Well Tracer Tests with a Pulse Input". doi:10.2172/5083452. OSTI   5083452.{{cite journal}}: Cite journal requires |journal= (help)
  27. ↑ Front Matter | Science and Technology for Environmental Cleanup at Hanford | The National Academies Press. 2001. doi:10.17226/10220. ISBN   978-0-309-07596-1.
  28. ↑ Coppersmith, K.J., R.C. Perman, R.A. Freeze, L.W. Gelhar, D. Langmuir, S.P. Neuman, and C-F. Tsang, Saturated Zone Flow and Transport Expert Elicitation Project, Yucca Mountain, prepared under U.S. Department of Energy Contract No. DE-AC01-91RW00134, 1998.
  29. ↑ Gelhar, Lynn W., Contaminant transport in the saturated zone at Yucca Mountain, pp. 237-254 in Uncertainty Underground: Dealing with the Nation’s High-Level Nuclear Waste, Allison Macfarlane and Rodney Ewing, editors, Cambridge, MA: MIT Press, 2006.
  30. ↑ "Publication".
  31. ↑ Ehlerding, Stephanie. "Awards". www.aihydrology.org. Retrieved 2017-12-27.
  32. ↑ "1999 Distinguished Service Award: Lynn Gelhar - College of Engineering - University of Wisconsin-Madison". College of Engineering - University of Wisconsin-Madison. 1999-10-15. Retrieved 2017-12-27.
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