NAGS Webinar, Geofilters

Geofilters Webinar from NAGSOn Wednesday, 8 October 2014, the North American Geosynthetics Society (NAGS) will host Webinar #3 in its 2014 series of professional development webinars. This time out, R. Jonathan Fannin, Ph.D., P.Eng (University of British Columbia) will present. The topic: Geofilters.
Time: 13:00 – 14:00 (EDT)
Date: 8 October 2014
REGISTRATION LINK (Registration closes October 7th, 2014)
Members of the International Geosynthetics Society (IGS), NAGS, and the Canadian Geotechnical Society (CGS) enjoy a substantial discount on registration.
USD $100 – NAGS, CGS and IGS member
USD $  25  – NAGS Student Members
USD $300 – Non-members
Professional development hours (PDHs) are available for paying participants.
GROUPS: Small groups of up to five people are welcome to participate for one registration fee. Groups larger than five would be required to pay a second registration fee.


The origins of current design practice for a granular filter are first examined, along with some of the lessons learned over the years from construction of very large embankment dams, including the WAC Bennett dam in British Columbia. The origins of current design practice for a geotextile filter are then examined, in conjunction with some of the lessons learned from their use in earthworks, including the rehabilitation of the Alouette dam spillway in British Columbia. The evidence to-date suggests that both sand-gravel filters and geosynthetic filters have generally performed well at controlling seepage flow in earthwork applications for many years. However there have also been problems reported, both for granular filters and for geotextile filters. This lecture draws upon industry-university research on the sinkhole incident at the WAC Bennett dam in British Columbia, and industry-university research on the filter compatibility of geotextiles in unidirectional and reversing flow, to understand better the significance of issues affecting the performance of geofilters in earthworks. The merits of mandating the use of a geosynthetic filter as an adjunct to a granular filter, in critical infrastructure, are then considered within the context of risk management.
Jonathan FanninJonathan Fannin obtained a B.Sc. (Civil Engineering) from the Queen’s University of Belfast, and a D. Phil. (Geotechnical Engineering) from the University of Oxford for studies on geosynthetics for soil stabilization. He is a recipient of several awards, including an IGS Award for contributions of laboratory and field research to engineering practice, a CGS Quigley Award for the best paper in the Canadian Geotechnical Journal, a Karl Terzaghi Fellowship from the Norwegian Geotechnical Institute and most recently, a Distinguished Visiting Fellow award from the U.K. Royal Academy of Engineering. Jonathan has provided specialist technical advice on a number of dam projects in North and South America and, in 2013, was made a Fellow of the Engineering Institute of Canada in 2013.
REGISTER LINK (Registration closes October 7th, 2014)
Lower your registration! Join NAGS, CGS, or IGS today:
North American Geosynthetics Society website
Canadian Geotechnical Society website
International Geosynthetics Society website