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“On the Cover” Key
This symposium showcases practical examples illustrating how data were collected and analyzed to evaluate the presence or absence of geologic and seismic hazards in a variety of geologic and geographic settings for a broad range of natural hazards. Separate keynote presentations blend related practical examples and lessons learned with the evolutionary histories of the Senior Seismic Hazard Analysis Committee (SSHAC) process and the field of paleoseismology. Other presentations address application of the SSHAC process and parallel paleoseismic and volcanic hazard studies at existing nuclear power plant sites in Taiwan; surface-rupturing earthquakes in slow deforming regions in Peru, Ecuador, and France; geoenvironmental hazards and community growth into geohazard areas in Peru; flooding, debris flow history, and landslide dams in California; paleoseismic studies for characterizing large upper plate earthquakes in Washington and engineering of pipelines across active faults; potential seepage and internal erosion of karstic foundation units at a dam site in Tennessee; communicating with geotechnical and structural engineers about geologic and seismic hazards; geophysical mapping of the Mt. Bonnell Fault of the Balcones Fault Zone in Texas; the 1811–1812 New Madrid earthquakes; potential hazards for proposed nuclear power plant sites related to karst in Tennessee and faulting and reservoir induced seismicity in South Carolina; seismically induced shaking, liquefaction, and lateral spreading in California and New Zealand; volcanism and related hazards at Mt. Adams in Washington; landslides or other slope and rock face stability issues in Arizona, California, Colorado, Utah, and Washington; and implications for federal land management agencies due to the January 2021 National Landslide Hazards Act. If hazards that could pose an unacceptable risk to public health and safety and the environment were determined to exist, then the need for a mitigation plan is also evaluated for some examples. In examples where mitigation planning was not part of the evaluation, the presentations provide information related to data collection and analysis methods that have proven successful for systematic evaluation of geologic and seismic hazards and offer guidance on methods that may be applicable for similar evaluations at other locations.
Conveners: Mark Molinari Room: Madero
Time Speaker Title
8:00–8:40 Kevin & Ryan Coppersmith Lessons Learned from Implementation of the SSHAC Process over 25 Years of Hazard Studies 8:40–9:00 Jamie Schick Mountain Tunnel Access Roadway Improvements 9:00–9:20 Edward Wellman Thermal Imaging for Rockfall Detection 9:20–9:40 Francisco Gomez Assessing Rock Face Instability with Ground-based Interferometric Radar: Application to Rock Faces in Eastern Utah 9:40–10:00 Kevin Clahan Seismic and Volcanic Hazard Studies for SSHAC and PVHA Evaluations at Existing Nuclear Power Stations in Taiwan 10:20–10:40 Lynne Carpenter The 2021 National Landslide Hazards Act and Implications for Federal Land Management Agencies 10:40–11:00 J. David Rogers Landslide Dams and Historic Outbreak Flood Events, Community of Montecito, Southern Santa Barbara County, California (Presented By Larry Gurrola) 11:00–11:20 Larry Gurrola Flood and Debris Flow History of the Montecito Watersheds, Santa Barbara County, California 11:20–11:40 Mark Molinari Empirical Analysis and Development of Landslide Runout Equations for Glacial Strata in the Salish Lowlands, Washington 11:40–12:00 Isaac Pope Revisiting the Forgotten Volcano: Volcanic History and Hazards of Mount Adams
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On the Cover…
Images from the Meeting’s Field Courses & Guest Tours
clockwise from top left: Field Course 6 – Canyon Lake Gorge Field Course 4 – Karst Cave – Cave Without a Name Natural Bridges Cavern San Antonio River Improvements Project
Technical Session #6 Land Subsidence Symposium
This symposium is the first AEG subsidence symposium on land subsidence since the Dr. Joseph F Poland Symposium at the 1995 AEG Annual Meeting in Sacramento, California. Speakers will discuss the causes, monitoring, infrastructure effects, remediation, management, and economic costs of subsidence induced by humankind. Subsidence caused by groundwater and hydrocarbon extraction, mining, hydrocompaction, and oxidation of organic materials often occur in the same location as subsidence resulting from natural causes such as sediment compaction and tectonics. Subsidence in coastal areas complicates the evaluation of sea-level rise. These coincident processes make the quantitative discernment of the individual processes contributing to subsidence difficult. Monitoring techniques such as interferometric analysis of space-based radar data, which have developed substantially in the decades since the Poland Symposium, aid this discernment by providing accurate changes in land surface elevation with high resolution over large regions.
Convener: James Borchers Room: Villa
Time Speaker Title
8:00–8:40 Michael Turco The Science and Policy of Groundwater Regulation: A Comprehensive Approach to Protecting the Houston Region from Land Subsidence
8:40–9:20 James Borchers Infrastructure Damage from Land Subsidence in California 9:20-9:40 Matthew Lees Linking Subsidence to Changes in Stored Water in California’s San Joaquin Valley 9:40–10:00 Brian Conway Arizona Department of Water Resources Land Subsidence Monitoring Program Using Interferometric Synthetic Aperture Radar (InSAR) 10:20–10:40 Zhuping Sheng Land Subsidence Caused by Groundwater Withdrawal and its Mtigation: Development of ASCE Standard Guidelines 10:40-11:00 Michael Byle A 25-year History of Induced Sinkhole Development Due to Quarry Dewatering in Bucks County, Pennsylvania 11:00–11:20 Michael Carpenter Continuous Monitoring of an Earth Fissure in Chino, California – A Management Tool 11:20-11:40 Feifei Qu The Latest Rate, Extent, and Temporal Evolution of Ground Deformation over the Gulf Coast of United States by InSAR (Presented by Zhong Lu) 11:40–12:00 Joseph Hughes Simulating Groundwater Pumpage Induced Land Subsidence using MODFLOW 6
THURSDAY, SEPTEMBER 23 – AFTERNOON Technical Session #7 Dams and Levees Symposium – Risk-n-the-River, Part II
(Sponsored by Schnabel Engineering)
AEG’s Dams Technical Working Group is pleased to host the Dams and Levees Symposium at the 2021 Annual Meeting in San Antonio. The theme of this year’s symposium is “Risk-n-the-River” will be presented in two parts. This session includes presenters from private consultants, federal and state government agencies, and academia. Topics include grouting, rock scour, 3D modeling, risk assessment, paleoflood investigations, tailings management, and site characterization.
Conveners: Edwin Friend and Hawkins Gagnon Room: Carranza
Time Speaker Title
1:40–2:00 Hawkins Gagnon Potential Failure Modes Analysis (PFMA) of the Beaver Falls Project in Ketchikan, Alaska 2:00–2:20 Caleb Ring Rock Scour of the Unlined Lewisville Dam Spillway Channel: A Probabilistic Approach for Risk-Informed Design (Presented by Michael George) 2:20–2:40 Rebecca Martin Consideration of Bedrock Characteristics in Estimating Grout Fill Volume: Historical Case Studies 2:40–3:00 David Burger Levees of the Eden Landing Wildlife Preserve, Regional Benefits of Levee Characterization 3:20–3:40 Kevin Richards Assessing Construction Risk of Proposed High Hazard Dam Modifications – a Case History at Red Rock Dam 3:40–4:00 Holly Nichols Application of the Dam Site Exploration Framework for the Parish Camp Saddle Dam Raise – More Than Meets the Eye 4:00–4:20 Brian Irsch Dam Grout Curtain Installation Made Easy with 3D Visual Modeling 4:20–4:40 Justin Pearce Litho-mineralogic Analyses Applied to Paleoflood Investigations for Dam Safety Risk Assessments (Presented by Bryan Freymuth) 4:40–5:00 Pricilla Nelson The Future of Tailings Management
Annual Meeting WIFI Code: aeg2021
Technical Session #8 Environmental Symposium – 1,4 Dioxane
(Sponsored by Bryan Environmental)
1,4-Dioxane——the Emerging Contaminant found in shampoo, flea and tick spray, deicing and fracking fluids, and in pesticides applied to food crops—— is the subject of AEG’s 2021 Environmental Symposium. 1,4-Dioxane contamination of groundwater, and drinking water, has become a nationwide problem of vast proportions. Dioxane (DXA) is found at the leading edge of multicontaminant plumes, and has been identified at many Superfund, government, military and industrial sites. The origin of Dioxane (DXA), its extensive spread, and its emerging impacts, will be explored, as well as the EPA regulatory approach to date. The citizens’ actions on Long Island will be highlighted, that resulted in New York State passing the strictest drinking water standard for dioxane in the nation. Remedial technologies that can treat Dioxane down to non-detect levels will be reviewed, and an innovative new bio-tech filter that reduces Dioxane in septic system discharge will be presented, all in this half-day symposium of invited Speakers, Thursday afternoon, September 23, 2021.
Conveners: Patricia Bryan and David Ebinger Room: Villa
Time Speaker Title
1:40–2:20 Joan Smyth Keynote: 1,4 Dioxane – In Consumer Products, Landfill Leachate, and Surface Water 2:20–2:40 Kyla Bennett Just Because It’s Legal Doesn’t Mean It’s Safe: The Case of 1,4-Dioxane 2:40–3:00 Adrienne Esposito Long Island Citizens React to Nation’s Highest Levels of Dioxane in Drinking Water Wells 3:20–3:40 Gary Smith 1,4-Dioxane in Groundwater: Emerging Contaminant Concerns 3:40–4:00 Gary Smith 1,4-Dioxane in Groundwater: A Worldwide Technology Survey 4:00–4:20 Arjun Venkatesan Innovative and Alternative Treatment Technologies to Mitigate 1,4-Dioxane 4:20–4:40 Discussion
(Sponsored by Collier Geophysics)
Time Speaker Title
1:40–2:00 Cassidy Grady Remote Geoenvironmental Hazard Mapping in the Arequipa Region of Peru 2:00–2:20 Brook Eberle Quantitative Analysis of Community Growth into Geohazard Areas in the Arequipa Region of Peru (Presented by Paul Santi) 2:20–2:40 Matthew Huebner Characterizing Potential for Seepage and Internal Erosion on Karst Foundation using a Holistic, Data-Based Approach 2:40–3:00 Janet Sowers Assessing Karst Hazards at a Proposed Nuclear Power Site in Tennessee 3:20–3:40 Mustafa Saribudak Geophysical Mapping of Mt. Bonnell Fault of Balcones Fault Zone, Central Texas 3:40–4:00 Phyllis Steckel The 1811–1812 New Madrid Earthquakes: Then & Now 4:00–4:20 Zane White Projected Climate Change Effects on Post-wildfire Debris Flow Parameters and Runout – 2017 Thomas Fire Area, California 4:20–4:40 Zack Westgate Glauconitic Sand: A New Geohazard for Offshore Wind? 4:40–5:00 Courtney Johnson Communicating Geologic and Seismic Hazards with Geotechnical and Structural Engineers
WANTS YOUR MEETING PHOTOS!
Please submit your BEST SHOTS of field trips, guest tours, technical sessions, social gatherings, and people just having fun. SEE PAGE 3 FOR PHOTO REQUIREMENTS. We also welcome REPORTS on the various field trips and other events for possible publication in the meeting summary in the Winter issue of AEG News. Submit shots to news@aegweb.org.
Claire Godwin at tidepools at Pt Lobos State Reserve—an example of Carmelo Formation sandstone.
