CEE Graduate Seminar Series
All seminars will be held in Gates 4401 from 10:30-11:50 unless otherwise noted.
All seminars are open to the campus community. The use of electronic devices is prohibited during seminar.
January 26 - Peter Adams (CMU)
Bringing Air Quality Models into Policy and Systems Analysis
Fine particulate matter (PM) is arguably the most important air pollutant. It consists of sub-micron-sized airborne particles, from diverse sources, composed of both organic and inorganic compounds. Exposure to fine PM is associated with approximately 100,000 premature deaths annually in the United States and several million globally.
Decisions regarding energy, transportation, and agricultural systems involve complex tradeoffs between societal needs, public health, global climate, and other considerations. In many cases, air pollution considerations are paramount; in cost-benefit calculations, premature mortality from fine PM often exceeds climate and other environmental damages. Yet, the health effects of air pollution are often neglected in these analyses because they are hard to quantify. Models must account for a complex set of atmospheric chemical reactions that form PM and for its spatial distribution, which determines human exposure.
This seminar will discuss this challenge, show some examples where state-of-the-art air quality models have been used to inform such decisions, and describe work my group has done to give decision-makers simple but accurate tools to account for air pollution health effects.
Peter Adams is a Professor in the Civil and Environmental Engineering Department and the Engineering and Public Policy Department at Carnegie Mellon University. Adams’s research largely focuses on development of chemical transport models and their application to decision-making, especially related to fine particulate matter. Adams also has extensive expertise in the simulation of aerosol microphysical processes, ultrafine particles and the formation of cloud condensation nuclei in global climate models. Areas of research have also included the effects of climate change on air quality, short-lived climate forcers, atmospheric ammonia and particulate matter formation from livestock operations, and the simulation organic particulate matter.
Adams currently serves on the EPA’s Clean Air Scientific Advisory Committee Particulate Matter Review Panel. He was selected for a Fulbright grant to collaborate with researchers at the Institute of Atmospheric Sciences and Climate in Bologna, has been a Visiting Senior Research Scientist at the National Aeronautics and Space Administration’s Goddard Space Flight Center, and received the Sheldon K. Friedlander Award for outstanding doctoral thesis from the American Association for Aerosol Research.
He has previously served on the Commonwealth of Pennsylvania’s Air Quality Technical Advisory Committee and the Allegheny County Health Department’s Air Toxics New Guidelines Proposal Committee, served as a consultant to the California Air Resources Board, and served in various capacities the American Association for Aerosol Research.
His research is supported primarily by the Environmental Protection Agency, the National Science Foundation, the National Aeronautics and Space Administration, the Department of Energy, and the Department of Defense. Adams received his BS degree in Chemical Engineering, summa cum laude, from Cornell University. He was awarded a Hertz Foundation Applied Science Fellowship for graduate study and received MS and PhD degrees in Chemical Engineering from the California Institute of Technology. He also holds an associated faculty position in the Chemical Engineering department at Carnegie Mellon.
February 2 - Peggy Johnson (The Pennsylvania State University)
Managing Stable Waterways at Bridges
Bridges over streams and rivers are susceptible to erosional processes during a wide range of flows. Local and contraction scour erodes sediment from bridge piers and abutments, potentially affecting the safety of the bridge. There has been considerable focus on assessing scour, designing countermeasures to protect bridges against scour, and designing foundations to resist scour. Stream channel instability, on the other hand, includes bank failure, lateral migration, and bed degradation, has the potential to impact safety at bridges as much or more than local and contraction scour. However, predicting and preventing channel instability at bridges has is a more difficult task.
The complexities and unique characteristics of bridge-waterway crossings have eluded computational modeling thus far. In addition, maintaining a safe and stable waterway opening under the conditions of an unstable stream channel has also proven to be difficult due to spatial limitations, lack of experience, and other constraints. Although national guidelines exist, each state tends to take different approaches to this problem. Thus, the feasibility of and confidence in each of the various possible solutions is not well known.
Selection of possible designs and countermeasures is a function of multiple factors, including effectiveness, cost, maintenance, constraints, and the ability to detect failure. Some countermeasures have been systematically tested, while others may have been laboratory tested, but not field tested. Others cannot be used effectively within existing right-of-ways. There is a wide range of costs associated with the initial design and construction of the stabilization measures, in addition to maintenance costs. The ability to detect failure or impending failure of a stream stabilization project or its components is important to assuring that the bridge will be protected during high flow events. In addition, movement of sediment through the bridge opening is important to avoid deposition that limits flow or changes the direction of flow.
Peggy Johnson is currently the Dean of the Schreyer Honors College and a Professor of Civil Engineering at Penn State University, where she had been a faculty member since 1996. As the Dean of the Schreyer Honors College, she oversees Honors Scholars, representing the top 2% of Penn State students across all disciplines. From 2006 to 2015, she was the Head of the Civil and Environmental Engineering Department at Penn State. She has served on the CEE faculty at Penn State since 1996.
Prior to coming to Penn State, she served on the faculty of the Civil and Environmental Engineering Department at the University of Maryland. Over her nearly three decades as a Professor in Civil Engineering, she has conducted research and taught classes in the areas of hydraulic engineering, bridge scour, stream restoration, reliability analyses, and river mechanics. Now, as the Dean, she teaches courses on leadership.
She has published numerous papers in peer-reviewed journals on bridge scour, stream restoration, uncertainty in hydraulics, bridge scour, and stream restoration, and the probability of bridge failure due to scour. She has conducted work on the stability and vulnerability of stream channel designs at bridges. Her method for assessing stream stability at bridge-stream intersections is incorporated as part of the Federal Highway Administration’s manual on stream stability at bridges (HEC-20).
Johnson has supervised the dissertations and theses of dozens of PhD, MS, and BS students. She is the Past-President and a Fellow of the ASCE Environmental and Water Resources Institute (EWRI), the largest institute within ASCE with more than 23,000 members. She received the ASCE Hans Albert Einstein award in 2016 for her contributions in the use of sediment transport for the evaluation and design of in-line control structures and stream restoration projects and the use of uncertainty and risk management for scour analyses. She also received the ASCE-EWRI Outstanding Woman of the Year award in 2012. In addition to winning several teaching awards, Johnson won the National Science Foundation Young Investigator award and in 1995, she won the NSF Presidential Faculty Fellow award.
She received a Master’s Degree in 1988 and a PhD in 1990, both from the Civil and Environmental Engineering department at the University of Maryland.
February 9 - Patricia Culligan (Columbia)
Green Infrastructure and Urban Stormwater Management
The management of stormwater runoff in urban environments remains one of the greatest environmental challenges of our time, not least because urban stormwater runoff is a primary cause of water-quality impairment in the United States today. Traditional engineering solutions for stormwater management, which include the construction of large underground detention basins, are becoming increasingly difficult to implement in many urban environments because of design and cost challenges, as well as land-area constraints. As a result, the identification of new approaches to manage urban stormwater runoff is becoming a priority for many U.S. cities. One approach that is rapidly gaining in popularity, involves the development of city-wide green infrastructure programs.
This talk will present results from a multi-year research program at Columbia University that has been investigating the stormwater management performance of a suite of green infrastructure types located in New York City. Data collection, modeling protocols and findings from the research program will be discussed, as well as the potential broader role of green infrastructure in promoting urban sustainability and resilience.
A leader in the field of water resources and urban sustainability, Patricia Culligan explores novel, interdisciplinary solutions to the challenges of urbanization, with a particular emphasis on the City of New York. Her research investigates the opportunities for green infrastructure, social networks, and advanced measurement and sensing technologies to improve urban water, energy, and environmental management.
She is co-Director of a $12 million research network sponsored by the National Science Foundation (NSF) to develop new models for urban infrastructure to make cities cleaner, healthier, and more enjoyable places to live. She is the founding associate director of Columbia University’s Data Science Center and the co-Director of the Earth Institute’s Urban Design Lab. In 2011, she was elected to the Board of Governors of the American Society of Civil Engineer's Geo-Institute. She is the author or co-author of more than 150 technical articles.
Culligan received her M.Phil. and Ph.D. from the University of Cambridge.
February 16 - Sanjay Srinivasan (The Pennsylvania State University)
Patterns, Proxies and Predictions: Some perspectives in geologic modeling and calibration
Formulating models that are data-exact, reproduce target statistics and at the same time provide an assessment of uncertainty due to incomplete information is an important objective of stochastic spatial modeling. Ultimately, these models for uncertainty feed into models for decision-making and reservoir development.
In this talk, I will present some of my recent efforts to stochastically model complex reservoirs, develop fast transfer function proxies to represent flow and transport through such complex reservoirs and finally, perform real-time updating and feed-back control of reservoir processes using these fast proxies. I will conclude my talk with some thoughts on how these improved uncertainty quantification procedures can help critical questions such as the value of information and the timing of reservoir develop decisions.
Geological systems such as subsurface reservoir or aquifers in many cases exhibit complex patterns of spatial heterogeneity in the form of channels, sand lenses, crosscutting faults and/or natural fractures. We have developed a unique stochastic simulation technique in the spectral domain that utilizes polyspectra to reproduce complex spatial patterns of continuity. Some novel approaches to condition these spectral simulations to “hard” data observed along wells will also be presented.
In most reservoir modeling scenarios, the data available to model reservoir heterogeneity is sparse and there is significant prior geologic uncertainty. The practice of model calibration or history matching to update the prior depiction of reservoir heterogeneity is quite popular. In this talk I will present a unique model selection scheme that is a distinct departure from this traditional paradigm of history matching. Instead of using the observed dynamic data to drive an iterative model perturbation scheme, the talk will explore the use of proxy responses to group a suite of prior models into clusters exhibiting similar connectivity characteristics. Then, the cluster exhibiting a flow behavior closest to the observed data is selected using a Bayesian scheme. The resulting selected subset of models permit assessment of residual uncertainty persistent after the model calibration process.
Sanjay Srinivasan is a professor of petroleum and natural gas engineering at the Pennsylvania State University and holds the John and Willie Leone Family chair in Energy and Mineral Engineering. He is also the Department Head for the John and Willie Leone Family Department of Energy and Mineral Engineering.
Srinivasan’s primary research focus is in the area of petroleum reservoir characterization and improved management of reservoir recovery processes. Some of the algorithms and methods that he has pioneered have been applied for early appraisal of ultra-deepwater plays in the Gulf of Mexico and for characterizing natural fracture networks in conventional as well as unconventional reservoirs. He has also partnered with researchers at the UT Institute of Geophysics and the Bureau of Economic Geology to develop novel schemes for integrating seismic data in reservoir models.
April 6 - Barney Fullington (Principal at Inflo Design Group, LLC)
Long Term Water Supply Planning
As a far suburb of Nashville, TN, the City of Columbia has begun to experience rapid residential and commercial growth over the past several years. In response to the growth and a need to increase system resiliency, Columbia Power & Water Systems (CPWS) embarked on a 15-year program to increase water supply, treatment and distribution system capacity.
As a regional water provider, the work requires close coordination with numerous stakeholders including neighboring water utilities, regional watershed agencies and state regulatory authorities. The anticipated cost of the program is $120M and will provide a long term water supply solution for the rapidly growing area.
The presentation will provide a summary of the planning work to date with a focus on the real-life process used, expected and unexpected hurdles to progress, and the benefits of regional cooperation.
Mr. Fullington has over twenty-two years of engineering consulting experience in the planning, design and construction administration of water and wastewater infrastructure for municipal utilities across North America. Over his career, he has specialized in pumping and treatment system design including managing large scale programs and projects ranging in size from $5M up to $200M.
He holds a Bachelor of Science degree in Civil Engineering from the University of Illinois-Urbana, Champaign and a Master of Science degree in Civil & Environmental Engineering from the University of Wisconsin-Madison.