2012 — S. Majid Hassanizadeh
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The 2012 Henry Darcy Distinguished Lecturer S. Majid Hassanizadeh, Ph.D., has been a professor of hydrogeology on the faculty of geosciences at Utrecht University since 2004 and is the senior adviser with the Soil and Groundwater Department of Deltares research institute. He earned his B.Sc. from Pahlavi University in Iran, and his M.E. and Ph.D. from Princeton University; all three degrees are in civil engineering. Hassanizadeh has worked at Abadan Institute of Technology and Yekom Consulting Engineers, both in Iran, and the National Institute of Public Health and Environment and Delft University of Technology in the Netherlands, the latter of which named him an Antoni van Leeuwenhoek professor in 2001-2003. He has also held visiting faculty positions at the University of Notre Dame; University of Bordeaux, France; EPF Lausanne, Switzerland; and Stuttgart University, Germany. Hassanizadeh served as editor of Advances in Water Resources (1991-2001) and associate editor of both Vadose Zone Journal (2002-2009) and Water Resources Research (2004-2009). He is a member of the International Advisory Board of the Journal of Hydrologic Engineering (since 2004), and on the editorial boards of Transport in Porous Media (since 1989), Journal of Porous Media Special (since 2009), Topics & Reviews in Porous Media (since 2010), and The Open Hydrology Journal and The Open Civil Engineering Journal (the latter two since 2007). In addition, Hassanizadeh is active as a session organizer or a member of various committees for the Netherlands Royal Academy of Arts and Sciences, the Netherlands Organization for Scientific Research, American Geophysical Union, Soil Science Society of America, European Geophysical Union, and the International Association of Hydrological Sciences. He is a founding member and managing director of the International Society for Porous Media (InterPore). Hassanizadeh has published close to 200 times in journals, books, conference proceedings, and technical reports. He’s cosupervised more than 35 graduate students, coorganized a large number of international conferences, workshops, and short courses, and he’s given more than 50 invited/keynote lectures in international meetings. He is a Fellow of both the American Geophysical Union (2002) and American Association for Advancement of Science (2007). He was awarded the honorary degree of Doktor-Ingenieur from Stuttgart University in 2008 and received the von Humboldt prize in 2010. Hassanizadeh’s research focuses on flow and transport in porous media through theory development, experimental studies, and modeling work. His current research includes pore-network modeling and experimental studies of two-phase flow, pore-network modeling of adsorbing solutes in unsaturated soil, transport of colloids and microorganisms in variably saturated soil, and novel remediation methods for NAPL-polluted soils.
Darcy Lecture Series host institutions were able to select one of two lectures.
"Capillarity in Porous Media, on Micro- and Macroscale, Revisited"
"Transport of Viruses in Partially Saturated Soil and Groundwater"
2011 — Stephen E. Silliman
The 2011 Henry Darcy Distinguished Lecturer Stephen “Steve” E. Silliman, Ph.D., joined the University of Notre Dame in January 1986 and is currently a professor of civil engineering andgeological sciences, with an emphasis in groundwater hydrology. He received his bachelor’s degree in civil engineering from Princeton University, and both a master’s degree and Ph.D. from the Department of Hydrology and Water Resources at the University of Arizona. At Notre Dame, he has been responsible for developing a research program in theoretical and applied aspects of groundwater hydrology. He has also enjoyed teaching a diverse set of courses at the undergraduate and graduate levels, has served as associate dean for undergraduate programs in the College of Engineering, and currently serves as associate chair in his home department. He is also the principal investigator of the Notre Dame Benin Research Program. Silliman’s research focus is divided between his theoretical/laboratory studies on groundwater flow/transport processes and water resource development/management in developing countries. His work on groundwater flow/transport has historically been focused on studies of the impact of heterogeneity in the saturated zone (flow, chemical transport, particle transport). Recently, this work has become more focused on the vadose zone as well as wellhead management strategies under uncertainty. His work in developing countries initially took place in Haiti, but has been focused in Benin, West Africa, for more than a decade. In these efforts, he has worked with his students (undergraduate and graduate) and Benin colleagues to train local populations to monitor water quality. These activities include modeling and field characterization of coastal hydraulics with a focus on the potential for saltwater intrusion of the wellfield serving Cotonou, the largest city in Benin, while assisting in the drilling/equipping of a number of manual-pump groundwater wells.
2010 — Timothy Scheibe
Timothy "Tim" D. Scheibe, Ph.D., joined Pacific Northwest National Laboratory in September 1992 and is a staff scientist in the Hydrology Technical Group. He received his bachelor’s degree in geological engineering from Washington State University, a master's in civil engineering from the University of Washington, and a Ph.D. in civil engineering from Stanford University. At PNNL, he has been responsible for proposal development, project management, and technical contributions in a number of different areas of environmental research and technology development broadly related to the hydrologic sciences. His primary research focus is on characterization and numerical simulation of natural subsurface heterogeneity, and its impacts on biogeochemically reactive transport in groundwater systems. His research projects include both computational and field experimental elements. Recently, he has worked on problems in the area of subsurface biogeochemistry, including microbial transport in groundwater, and bioremediation of metals and radionuclides. He is collaborating with computational scientists and applied mathematicians to simulate coupled flow, transport, and biogeochemical processes at cellular, pore, and continuum scales. His research is supported primarily by the Department of Energy's Office of Science through the Environmental Remediation Science Program and the Scientific Discovery through Advanced Computing Program. Ground Water® since 2001 and is active in the American Geophysical Union, in which he represents the Hydrology Section on the Joint Assembly Program Committee. Darcy Lecture Series host institutions were able to select one of two lectures. "Beyond the Black Box: Integrating Advanced Characterization of Microbial Processes with Subsurface Reactive Transport Models" was an overview of environmental microbiology. As a hydrogeologist with a geological engineering background, my natural focus has often been on physical processes of flow and transport in heterogeneous aquifers. Over the past decade, however, I have been privileged to have had opportunities to work closely with microbiologists on several projects, and my engineer brain has been highly stretched in the process. In fact, I have found myself on many occasions amazed not only by the microscopic world of subsurface microbes (did you know that some can "breathe" metal, or that others can flourish within ionizing radiation fields that would quickly destroy us?), but also by how technically advanced the science of microbiology has become. The field of environmental microbiology has taken a quantum leap through developments in molecular biology such as high-throughput multiplex sequencing, high-density microarrays, and environmental proteomics; these technologies provide a deluge of information on the nature and function of microbial communities in natural systems. Importantly, many of these systems are relevant to such pressing issues as contaminant remediation and subsurface sequestration of carbon dioxide. A key question is: How can we use this information to make quantitative predictions in support of environmental management decisions? Microbial processes are typically represented in subsurface reactive transport models based on relatively simple reaction rate models that do not account for known and important complexities of microbial function and community dynamics. While conventional approaches have been very effective in many settings, an opportunity is now being realized to improve the foundational basis of reactive transport model predictions by integrating newly available microbial characterization data and understanding. This talk introduced the audience to the amazing world of subsurface microorganisms and presented some novel approaches for incorporating new knowledge and data into reactive transport simulations. Particular focus was given to genome-scale models of microbial cell function, and how these models were being integrated into simulations of contaminant transport and fate in groundwater systems. These were presented in the context of the application of in situ bioremediation that aims to immobilize uranium in groundwater through microbially mediated metal reduction. "Quantifying Flow and Reactive Transport in the Heterogeneous Subsurface Environment: From Pores to Porous Media and Facies to Aquifers" was an overview of advanced computational methods. Hydrogeologists working on problems related to groundwater contamination, remediation, or water quality protection face an extraordinary challenge. The fundamental transport and reaction processes that control contaminant fate occur at length scales that are many orders of magnitude smaller than the scales at which predictions of observable phenomena are needed. Spatial variability (heterogeneity) of physical and biogeochemical properties exists across the entire range of relevant scales. In this presentation, audiences were taken on a numerical journey through the range of length scales. Along the way, they examined a number of case studies that illustrate both the challenges posed and some exciting ways that advanced computational methods are being brought to bear on these problems. They started by examining pore-scale simulations of flow, transport, and reactions in porous media, in which the complex geometry of solid grains and pore spaces is explicitly quantified. Pore-scale models are being used to develop new understanding of fundamental processes that can be incorporated into larger-scale models that treat porous media as effective continua. Audiences considered the applicability of two approaches: (1) direct upscaling of pore-scale simulation results using various methods, and (2) multiscale hybrid modeling, in which pore- and continuum-scale models are combined within a single simulation. At the continuum scale, complex geological heterogeneity is expressed at a multitude of scales. For example, in sedimentary aquifers one may observe sediment architectural elements such as lamination (typically millimeter scale), cross-bedding (typically centimeter scale), and larger units such as beds, bed sets, facies, formations, aquifers, and aquitards. The audience examined the representation of geologic heterogeneity in reactive transport models, with a focus on the effects of correlated physical and biogeochemical heterogeneity. These issues were presented in the context of a number of field sites relevant to U.S. Department of Energy contamination problems, including a bacterial transport site, a uranium bioremediation site, and a site with persistent uranium contamination associated with diffusion-controlled mass transfer processes.
2009 — Peter Cook
Peter Cook, Ph.D., is a senior principal research scientist with CSIRO Land and Water. He received a B.A. in geography from Australian National University in 1986 and a Ph.D. in Earth sciences from Flinders University of South Australia in 1992. Between 1992 and 1994, Cook carried out postdoctoral research at the U.S. Department of Energy and University of Waterloo, Canada, before returning to Australia. Cook’s research interests span the fields of groundwater hydrology, ecohydrology, isotope hydrology, and unsaturated zone flow, but have mostly focused on the use of environmental tracers, including the integration of tracer and hydraulic methods. Specific research projects have involved estimation of aquifer recharge, quantification of groundwater, discharge to streams and wetlands, prediction of stream and groundwater salinization rates, and assessment of groundwater-dependent ecosystems. He has cowritten books on environmental tracers and ecohydrology.
2008 — Michael Celia
Michael Celia, Ph.D., was the 2008 Darcy lecturer. He received a B.S. in civil engineering from Lafayette College in 1978, and an M.S. (1979) and Ph.D. (1983) in civil engineering from Princeton University. In 1985, he joined the faculty of MIT, returning to Princeton in 1989 to join the civil engineering faculty. Celia's areas of research include groundwater hydrology, ecohydrology, numerical modeling, contaminant transport simulation, and multiphase flow physics. Ongoing projects include pore-scale network modeling to study interface dynamics, reactive transport, and scaling in porous media systems; computational studies of plant responses to variations in soil moisture in water-stressed ecosystems, with a focus on applications in sub-Saharan Africa; and studies associated with large-scale injection of CO2 into deep brine formations as a possible mitigation strategy for the atmospheric carbon problem. The carbon work is part of a large multidisciplinary effort at Princeton known as the Carbon Mitigation Initiative. Celia served for 10 years as editor of the journal Advances in Water Resources. He is a Fellow of the American Geophysical Union and recipient of the 2005 AGU Hydrologic Sciences Award.
2007 — James J. Butler Jr.
James J. Butler Jr., Ph.D., is a senior scientist in the Geohydrology Section of the Kansas Geological Survey at the University of Kansas, where he has worked since 1986. Butler also serves as an associate of the KU Center for East Asian Studies and as a courtesy professor in the KU Department of Geology. He has previously held visiting scientist positions in the Center of Applied Geoscience at the University of Tubingen (Germany) and in the Geohydrology Department of Sandia National Laboratory. Butler has also been a graduate researcher in the Institute of Geology of the State Seismological Bureau in Beijing, China.
2006 - Eileen Poeter
Eileen Poeter, Ph.D., the 2006 Darcy lecturer, is a professor of geological engineering at the Colorado School of Mines and director of the International Ground Water Modeling Center. Before entering academia, she worked for Golder Associates in the early 1980s and has continued to consult throughout her academic career.
2005 — Kip Solomon
Kip Solomon, Ph.D., was the 2005 Darcy lecturer. His education includes a Ph.D. in Earth sciences from the University of Waterloo, an M.S. in geology from the University of Utah, and a B.S. in geological engineering from the University of Utah.
2004 — Allen M. Shapiro
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Allen M. Shapiro, Ph.D., is a research hydrologist with the USGS in Reston, Virginia.
2003 — Richelle Allen-King
Richelle Allen-King, Ph.D., an associate professor at University at Buffalo, was the 2003 lecturer. She received her Ph.D. from the Department of Earth Sciences, University of Waterloo, and a B.A. from the Department of Chemistry at the University of California, San Diego.
2002 — David Hyndman
David Hyndman, Ph.D., an associate professor in the Department of Geological Sciences at Michigan State University, was the Darcy lecturer in 2002.
2001 — Mary C. Hill
2000 — M. James Hendry
1999 — Scott Tyler
1998 — Barbara Sherwood-Lollar
1997 — Philip C. Bennett
1996 — Linda Abriola
1995 — Paul Hseih
1994 - Edward Sudicky
1993 — Mary Jo Baedecker
1992 — John Wilson
1991 — Stephen Wheatcraft
1990 — Ralph C. Heath
1989 — Randy L. Bassett
1988 — Thomas A. Prickett
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