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GSI to host webinar on landfill covers

Events | March 23, 2021 | By:

The Geosynthetic Institute (GSI) will sponsor a webinar, “Geosynthetic Drainage Materials: Applications, Design, Installation and Performance,”on April 14, from 11:30 a.m. to 1 p.m. EST. Geosynthetic Materials Association (GMA) member companies and their employees receive discounted rates on all GSI webinar and short course registrations.

Geosynthetic drainage materials consist of a drainage core (geonet or geospacer) with geotextiles bonded to one or both surfaces. Their in-plane flow capacity is equivalent to 12 inches (300 mm) of sand with permeability of 0.01 cm/sec or higher. The associated cost of these materials and their installation greatly favors this type of geosynthetic alternative on myriad applications. For example, solid waste liner and cover applications, plaza decks and green roofs; retaining walls and slopes; and tunnel linings all have successful history in this regard. Design considerations will be described and focus on flow rates and compressive behavior, both being standardized ASTM/ISO test methods.

Critical in their proper performance are connections and attachments along edges and ends for proper field performance. A major successful field project is presented as well as four unsuccessful projects. Lastly, a laboratory study on plastic cable ties (used to join most types of geosynthetic drains) will be presented along with appropriate commentary.

Learning objectives

Participants of this webinar will be exposed to the plethora of geosynthetic drainage materials that are currently available vis-à-vis the various applications that they service. Design and testing issues will be illustrated and explained. Methods of field connections and attachments will be described, particularly the use of plastic cable ties. Successful field projects, as well as four unsuccessful ones, will be illustrated in the context of “lessons learned.”

Webinar benefits

1.         Understand various types and differences of geosynthetic drainage materials

2.         Understand the many applications where these drainage products are used

3.         Learn the essential test methods for design as counterpointed to the applications

4.         Learn how to properly accomplish connections and attachments

5.         Be exposed to successful and unsuccessful field projects using geosynthetic drainage materials

6.         Learn how to test plastic cable ties insofar as installation is concerned

Intended audiences

This webinar will be beneficial to consulting engineers and designers involved in the controlled flow of all types of liquids and even gases; geosynthetic and soils testing laboratory personnel; field construction quality assurance/construction quality control (CQA/CQC) personnel for both materials and installation practices; owners and operators of solid and liquid waste facilities as well as many other public facilities; and federal, state and local regulators in both environmental and transportation sectors of their respective mandates.

Webinar instructor

George R. Koerner, Ph.D., P.E., and CQQ, is the director of the Geosynthetic Institute. He is in charge of laboratory accreditation, field certification and continuing education at the institute. He also manages several research projects and has published more than 350 technical papers in his 35-year association with polymers used in below-ground construction. Koerner’s Ph.D. is from Drexel University in geotechnical engineering. He is a registered professional engineer and a certified quality auditor. Koerner has received many awards over the years. The most notable being IFAI’s Environmental Technologies Award of Excellence 1995, ASCE’s DVGI Geotechnical Engineer of the year in 2004, the title of ASTM Fellow in 2013 and GMA’s first Robert M. Koerner Lecture and Award in 2017.


Webinars cost $200.00 for GSI and GMA members, and $250.00 for nonmembers. Successful completion of a multiple-choice test after the webinar carries 1.5 professional development hours (PDH).

For more information or to register, visit

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