JOIN us for The  
Sacramento branch Meeting

AEG and gra present: Subsidence around the world

Join us In Person

Wednesday, December 11, 2024 | 5:30 p.m. - 8:30 p.m.  

Location: 

Aviator's Restaurant
6151 Freeport Blvd,
Sacramento, CA 95822

 AEG and gra present: Subsidence around the world

INFORMATION:

Join GRA and AEG for our annual holiday gathering. Jim Borchers of the USGS will present "Subsidence Around the World, a Summary of Presentations at the Fourth Annual AEG Land Subsidence Symposium, and a Few Thoughts on Critical Head." We are also bringing back the holiday raffle event so please bring donated geology-appropriate items and some cash to participate. Proceeds from the raffle go to supporting students that wish to attend Western Groundwater Conference and the AEG annual meeting. $5 per ticket or $20 for 5 tickets. Holiday themed sweaters are optional, merriment is required.

This presentation, introduced AEG’s 2024 Land Subsidence Symposium, summarizing land subsidence as reported in the news media world-wide during 2023-2024. It displays photos and videos of recent land subsidence features globally-- from catastrophic sink hole formation in Ireland and Illinois to coastal inundation in Asia, and major deltas and urban areas of the world, to Siberian craters and slumps in thawing permafrost, to building damage in England from shrinkage of clay soil during drought. Nearly 25 percent of the world’s population lives in areas subsiding or likely to subside.

SPEAKER:

Mr. Borchers worked with the USGS for 31 years following his first professional love-- using multidisciplinary tools to understand groundwater-flow systems in fractured rocks. He worked on groundwater availability and water-quality studies in the fractured-rock aquifers of the Appalachian Plateau of West Virginia and the Sierra Nevada, and sedimentary aquifers of the Coast Ranges, and the east San Francisco Bay area of California. He assessed infrastructure damage from subsidence caused by groundwater mining in the alluvial aquifers of the Sacramento Valley. After forming Water Matters LLC, Mr. Borchers evaluated subsidence throughout California, prepared subsidence monitoring plans, assisted the US Forest Service and National Park Service to determine the source of subsurface water to Giant Sequoia groves, and served as an expert hydrologist for the US Department of Justice and National Park Service and the County of San Luis Obispo, California.

A former vice chair and program manager of the Sacramento Section AEG, he organized the field trip ‘Geology of the Sacramento Valley’, convened the session ‘Tectonics and Fractured Rock Hydrology’ at the 1991 meeting of the American Geophysical Union, organized the Dr. Joseph Poland Symposium on Land Subsidence at the 1995 Annual Meeting of the Association of Engineering Geologists in Sacramento, edited AEG Special Publication No. 8, Land Subsidence Current Research and Case Histories and worked with Luhdorff and Scalmanini Consulting Engineers to produce the report,’ Land Subsidence from Groundwater Use in California’ used to inform the California Legislature considering the Sustainable Groundwater Management Act in 2014. As Chair of the AEG Working Group on Land Subsidence he organizes the Land Subsidence Symposia at each annual meeting of the AEG

LOCATION:

Aviator's Restaurant
6151 Freeport Blvd,
Sacramento, CA 95822

REGISTRATION:

Members: $35

Non-Members: $45

Students: $10


             

CONTACT INFORMATION:

Lauren Short
Short@geoconinc.com