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The 2023 Koerner Lecture Q&A session
April 1st, 2024
George Koerner: Geomembranes used as landfill liners may experience differential settlement or local strain due to protrusions or anomalies in the subgrade. Therefore, it is important to define a maximum allowable strain that any given geomembrane can tolerate without compromising its integrity. Do you have an opinion on what this strain limit should be for […]
Geotextile filtration clogging resistance
February 1st, 2022
Q: I have a question about the Filter Criteria in the Federal Highway Administration (FHWA) procedure "Filter Performance and Design for Highway Drains" procedure, specifically the geotextile filtration clogging resistance equation 2-10. This seems to require a particularly large pore size; for example, if the D15 of the soil was for 70 microns, the minimum […]
The GMA Techline
February 1st, 2020
Moderated by George R. Koerner and Y. “Grace” Hsuan DARCIAN PERMEABILITY Q: I am aware of the section in your book regarding geomembrane “permeability” and get from it that it aims to calculate an equivalent Darcian permeability using vapor diffusion via Fick’s law. Can one use the derived permeability then when calculating flow using Darcy’s […]
GSI to host webinar on geotextile filters
March 27th, 2019
The Geosynthetic Institute (GSI) will sponsor a webinar, “Geotextile Filters: Concerns and Issues,” on April 10, from 11:30 a.m. to 1 p.m. EDT. Geosynthetic Materials Association (GMA) member companies and their employees receive discounted rates on all GSI webinar and short course registrations. It is roughly estimated that geotextiles have been used in more than […]
Geosynthetics Institute webinar calendar for 2018; GMA members get discount
July 9th, 2018
July–December 2018 | 11:30 a.m.–1 p.m. EDT Duration: 1.5 hours GSI/GMA Members: $200.00 USD per webinar Non-GSI/GMA Members: $250.00 USD per webinar The Geosynthetic Materials Association (GMA) is proud to promote Dr. Robert M. Koerner and the Geosynthetic Institute (GSI) education program. Dates of upcoming and future GSI webinars, which are designed to enhance and grow your knowledge of the industry, follow. […]
GSI’s Robert M. Koerner to host webinar on geotextile filters
June 23rd, 2018
The Geosynthetic Institute (GSI) will sponsor a webinar entitled "Geotextile Filters: Concerns and Issues," on July 11, 2018, from 11:30 a.m. to 1 p.m. EDT. The webinar will be hosted by Dr. Robert M. Koerner. This is the first GSI webinar for which all GMA member companies and their employees will receive discounted rates on webinar […]