Dedicated to advancing the use of fabricated geomembranes through education, research, and technology transfer.

WHY?
Factory fabrication reduces field welding, reduces installation time and costs, allows modular construction and provides consistent seam and liner quality.

Geomembrane Test Method Videos Now Available

FGI has created FIELD AND FACTORY VIDEOS for the following
Test Methods:

ASTM D1239 Chemical Resistance, ASTM D1203 Volatile Loss, D5641 Vacuum Chamber, ASTM D4437 Air Lance Test,
ASTM D5994 Thickness (Textured), D5119 Procedure B Thickness (Smooth), ASTM D7408 Seam Peel Strength, ASTM D882 Tensile Properties & D7408 Seam Shear Strength, ASTM D1204 Dimensional Stability, ASTM D1790 Brittleness Temperature.

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Listen to our Geo-Engineering Podcast Series!

Join Tim Stark (Professor of Civil Engineering and Technical Director of the FGI) and Jen Miller (Coordinator of the FGI) as they discuss the latest emerging geosythetics industry trends and news.

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Earn PDH Credits Online
FREE!

Cutting edge topics presented by industry experts & scholars.

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View Our Latest Webinar:
US EPEA Reconsideration of CCR Regulations Impacting the Geosynthetics Industry

Presented by JR Register, P.E. of Consumers Energy, and Andrew Bittner, P.E. of Gradient
Recorded October 8, 2020.

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Education - Research - Technology Transfer

FGI is committed to these objectives. Click below to learn more about our Mission

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Design and Installation Detail Drawings Available

Details available for constructing a containment facility including pipe boots, concrete attachments, penetrations, and vent details.  Both PDF and DWG available.

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We are a non-profit organization providing education, research, and support for the flexible and fabricated geomembrane industry.

Check out some of our research and related topics

TECH CORNER

Ask the expert...
Tim Stark, FGI Technical Director

Tim Stark, Ph.D., P.E., D.GE., F.ASCE

FGI TECHNICAL DIRECTOR

Review our FAQs and you still have a question, please CONTACT US & Tim will get back to you as soon as possible...

Geomembrane Guide

An interactive list of geomembrane products for various applications. Read more

The FGI Equipment Guide

An interactive list of welding equipment and products for
fabricated geomembranes. Read more

The FGI Pond Leakage Calculator
Geomembranes v. Compacted Clay Liners

Pond Leakage Calculator - Fabricated Geomembranes
Fresh water is a precious resource with demands rising daily and supply greatly fluctuating. Only two (2) percent of all water on Earth is fresh water with the other 98% being salt water.  This 2% of fresh water is comprised of: 87% ice, 12% groundwater, and 1% rivers and lakes.  Thus, only 13% of the available freshwater is readily accessible.  Therefore, it is imperative that we capture and hold these limited water resources for agriculture, domestic use, and industry and also protect valuable groundwater from surface or subsurface contamination.

The FGI’s Pond Leakage Calculator is a Microsoft EXCEL spreadsheet based on Darcy's Law of Seepage and provides a comparison between leakage rates from a canal, pond, or reservoir constructed with compacted fine-grained soils and a geomembrane liner system. The Leakage Calculator allows the user to input the size of the containment basin (including length, width, depth, side slope angle and freeboard), the anticipated level of hydraulic conductivity of the compacted soil or geomembrane liner, and the relative cost of water in dollars per acre-foot of water.

The Calculator then calculates the volume of the basin in gallons, a comparison of leakage rates between the compacted soil and geomembrane liner systems in gallons, and the cost of the leakage based on the cost of water per acre-foot to replace it. This Calculator is designed to help consultants, engineers, architects, and end users decide how to line their canals, ponds, reservoirs, and basins to capture and/or protect valuable fresh water.  The Calculator does not consider variances in construction quality and operational techniques on the long-term effectiveness of the chosen liner system. The FGI has additional research and publications to help with other aspects of successful water containment applications.

Types of Geomembranes
Four (4) popular types of geomembranes are available for pond liner systems.  These four (4) geomembranes in ALPHABETICAL order are: (1) EPDM, (2) reinforced polyethylene (RPE), (3) Polypropylene (PP), and (4) Polyvinyl Chloride (PVC). EPDM (Ethylene Propylene Diene Monomer) geomembranes are unreinforced and have been used for the construction of ponds of varying kinds. EPDM geomembranes are made from rubber and can be welded together with tape and primer. EPDM can be reinforced or unreinforced.  RPE geomembranes have a high tensile strength and puncture resistance because they are reinforced. RPE geomembranes also can be welded with heat.  PP geomembranes can be unreinforced or reinforced depending on the application. Reinforced PP geomembranes also have a high tensile strength and puncture resistance because they are reinforced. PVC geomembranes are also unreinforced and have been used successfully for decades in water canals, ponds, and reservoirs. PVC geomembranes can be welded with heat and/or solvents.

Please click below to access FGI’s Pond Leakage Calculator.
 Calculator
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Temporary Landfill Covers - Design & Construction

FGI Webinar: US EPEA Reconsideration of CCR Regulations Impacting the Geosynthetics Industry
Presented by JR Register, P.E. of Consumers Energy, and Andrew Bittner, P.E. of Gradient

Recorded October 8, 2020
VIEW ALL RECORDED WEBINARS

News

FGI Creates Geomembrane Defect Leakage Calculator

This calculator estimates the leakage through geomembranes and composite liners with and without geomembrane defects/holes. The calculator illustrates the importance of intimate contact between the geomembrane and compacted subgrade or soil liner via different levels of contact.  The effect of wrinkles on leakage rates is also quantified using a database of wrinkle dimensions for a number of common geomembranes, which shows the presence of wrinkles can significantly increase leakage rates.

To view/download all of the FGI Calculators, please click HERE.

GM Defect Leakage Calculator

Geo-Engineering Podcast Series by the FGI!!!

Listen Today at fabricatedgeomembrane.com/resources/podcasts

Join Tim Stark (Professor of Civil Engineering) and Jen Miller (Coordinator of the FGI) as they discuss the latest emerging geosynthetic industry trends and news with leading industry experts. Topics of podcasts include a wide range of geotechnical and geosythetic related applications, such as: Yeager Airport RSS Failure Case History, Drainage Geocomposites, Post Closure Care of Landfills, Leak Location Surveys, Air Channel Seam Testing, Pond Leakage Calculators, and many more!!

Tune in Today. Podcasts are available to download from the FGI Website or from the following online streaming services: Spotify, Apple Podcasts, Anchor FM, Breaker, Pocket Casts, RadioPublic, & Google Podcasts.

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Resources

Pond Leakage Calculator

Use our Excel calculator to learn what measurements are needed to properly plan for your pond liner project.

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FAQs

Frequently asked questions from members, customers and industry professionals answered.

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Specifications & Guides

FGI, ASTM and IAGI material specifications in one place for your reference and convenience

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Geomembrane Guide

A comprehensive guide to industry and our member material offerings for fabricated geomembranes.

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