National Ground Water Association (NGWA)

2014 Henry Darcy Lecture Series offers two lectures involving x-ray tomography


WESTERVILLE, OH -- Oregon State University Associate Professor Dorthe Wildenschild, Ph.D., will offer two lectures in the National Ground Water Research and Educational Foundation's 2014 Henry Darcy Distinguished Lecture Series in Groundwater Science.

Wildenschild’s research focuses on physics, chemistry, and microbiology relevant to flow and transport in porous media.

The first of her two lectures is titled “What Happens in the Pore, No Longer Stays in the Pore: Opportunities and Limitations for Porous Media Characterization and Process Quantification Using X-ray Tomography.”

Wildenschild will provide an overview of the current state of imaging of porous media systems — and processes taking place within them — using x-ray tomography, a technique that allows for three-dimensional observation and measurement of variables internal to an otherwise opaque object. X-ray tomography has advanced to where it is possible to probe porous media in great detail, allowing for fully quantitative analyses of processes and mechanisms at the pore scale.

Also discussed will be technique limitations, as well as new potential advances that will allow for exciting new research in coming years. Applications of the technique to remediation of non-aqueous phase liquid in groundwater, the fundamentals of multiphase flow, and geologic sequestration of carbon dioxide will be presented.

Wildenschild’s second lecture is titled “Optimizing Capillary Trapping as a Carbon Dioxide Mitigation Strategy: Pore-Scale Findings in Support of Larger-Scale Implementation.”

This lecture will examine how x-ray microtomography is being studied for possible use as a technique to optimize capillary trapping of carbon dioxide. Capillary trapping is a mechanism supporting carbon capture and storage, which is being considered as a mitigation strategy for emissions from concentrated sources such as coal-fired power plants.

Results so far indicate that carbon dioxide injection can be manipulated to facilitate optimal trapping of residual carbon dioxide.

Sites interested in hosting the Darcy Lecture are encouraged to complete the request form and submit it via e-mail to by October 1, 2013. No other methods of request can be accepted.

NGWREF, founded in 1994 as an IRS-approved public charity, is operated by the National Ground Water Association as a 501(c)(3) public foundation focused on conducting educational, research, and other charitable activities related to a broader public understanding of groundwater.

NGWA, a nonprofit organization composed of U.S. and international groundwater professionals — contractors, equipment manufacturers, suppliers, scientists, and engineers — is dedicated to advancing groundwater knowledge. NGWA’s vision is to be the leading groundwater association that advocates the responsible development, management, and use of water.

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