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Topic:  A Tale of Two Porosities: Exploring Why Contaminant Transport Doesn’t Always Behave the Way It Should

Speaker:  Dr. Kamini Singha, Associate Department Head, Department of Geology and Geological Engineering, Colorado School of Mines

Time: Tuesday, February 12, 11:30am-1pm

Location: PLEASE note the change of location for this meeting.  CEMS will be meeting at Davis Graham & Stubbs LLP, 1550 17th Street, Suite 500 (5th Floor), Denver, CO 80202. When entering the building, please proceed to the fifth floor to register with the CEMS representative.

CEMS/Davis Graham & Stubbs will NOT validate parking for this event.

CEMS has received one (1) CLE for this presentation  

Transport through preferential flow paths is important in a broad range of scientific disciplines. In hydrogeology, the ability to quantify subsurface transport is an issue of paramount importance due to problems associated with groundwater contamination.  Observational challenges and complexity of hydrogeological systems lead to severe prediction challenges with standard measurement techniques.  One important example of a prediction challenge is “anomalous” solute-transport behavior, defined by characteristics such as concentration rebound, long breakthrough tailing, and poor pump-and-treat efficiency.  These phenomena have been observed at research and aquifer-remediation sites in diverse geologic settings, and are not predicted by classical theory. Numerous conceptual models have been developed to explain anomalous transport, such as the presence of two distinct populations of pores—one where solutes are highly mobile and another where they are not—but verification and inference of controlling parameters in these models in situ remains problematic, and often estimated based on data fitting alone. Recent tests using simple electric geophysical methods directly measure the process of mobile-immobile mass transfer and allow estimation of parameters controlling anomalous transport.  Here, I present a rock-physics framework, an experimental methodology, and analytical expressions that can be used to determine parameters controlling anomalous solute transport behavior from co-located hydrologic and electrical geophysical measurements in a series of settings, including groundwater and surface water-groundwater systems.  The long-term goals of this work are to contribute toward improving the predictive capabilities of numerical models and enhancing the fidelity of long-term groundwater monitoring frameworks.

Kamini Singha is the Ben Fryrear Endowed Professor for Innovation and Excellence at the Colorado School of Mines, and serves as the Associate Department Head of the Department of Geology and Geological Engineering.  She worked at the USGS Branch of Geophysics from 1997 to 2000, and served on the faculty of The Pennsylvania State University as an assistant and then associate professor from 2005 to 2012.  Her research interests are focused in hydrogeology and environmental geophysics. Dr. Singha is the recipient of an NSF CAREER award, was awarded the Early Career Award from the Society of Environmental and Engineering Geophysics, served as the National Groundwater Association’s Darcy Lecturer in 2017 and became a GSA Fellow in 2018.  She earned her B.S. in geophysics from the University of Connecticut in 1999 and her Ph.D., in hydrogeology, from Stanford University in 2005.

Location: PLEASE note the change of location for this January meeting.  CEMS will be meeting at Davis Graham & Stubbs LLP, 1550 17th Street, Suite 500 (5th Floor), Denver, CO 80202. When entering the building, please proceed to the fifth floor to register with the CEMS representative.

MEETING FORMAT: Members may either bring their own lunch and attend the meeting for no charge, or they may request that CEMS order a box lunch for them. The cost of the box lunch for members is $16.00; for non-members, $19.00.

RESERVATIONS: PLEASE give your name, company name and phone number via email to admin@coems.org. PLEASE INDICATE IF YOU ARE RESERVING A BOX LUNCH OR BRINGING YOUR OWN. Reservations must be received BEFORE Friday, February 8, 2019 at 5:00PM. No reservations will be taken after this date! Payment of $16.00 for members, $19.00 for non-members will be accepted at the door with prior reservation. Please cancel your reservation by Friday, February 8, 2019 if you are unable to attend. It is the policy of the Society to bill for meals reserved but unclaimed. You may also pay with credit card via PAYPAL below:


Box Lunch
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