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.

Earn PDH Credits Online
FREE!

Cutting edge topics presented by industry experts & scholars.

View

View Our Latest Webinar

Geosynthetics in Challenging Regulatory Environments
Recorded on November 6, 2019
Presented by Evan Andrews, PE, PMP of Duke Energy

View

Education - Research - Technology Transfer

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

Learn MOre

New: Design and Installation Detail Drawings

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

View details

Geomembrane Test Method Videos Now Available

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

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

View Test Videos
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
COMPLETE THIS FORM
TO VIEW THE LATEST FGI WEBINAR
Temporary Landfill Covers - Design & Construction

Geosynthetics in Challenging Regulatory Environments
Presentd by Evan Andrews, PE, PMP of Duke Energy
Recorded on November 6th , 2019
VIEW ALL RECORDED WEBINARS

News

In Memoriam of Robert and Paula Koerner

The Fabricated Geomembrane Institute and its members would like to express our condolences on the passing of Dr. Robert M. Koerner and his wife Paula W. Koerner. Together, Bob and Paula founded the Geosynthetic Institute (GSI) in 1986 and maintained it at the forefront of the industry.  In addition, Bob was the “Father of Geosynthetics” and brought geosynthetics into main stream civil engineering.  Bob´s academic contributions to the industry include over 750 papers on geosynthetics and the pioneering textbook, “Designing with Geosynthetics” which is now in its sixth edition. The FGI is grateful for all of Bob’s and Paula’s contributions to the geosynthetics industry and encourage our members and others to visit the Koerner Family Foundation website at www.kffoundation.org.

FGI Fall 2019 Newsletter - Now Available

Check out the FGI's Fall 2019 Newsletter with information on Safety, Coal Combustion Residuals Short Course, Upcoming Webinar on Fabrication, Installation & Testing of Geomembranes, Update to the FGI's PVC Geomembrane Specification, Women in Geosynthetics, FGI's New Installer Membership, and more....


Download Newsletter
More news
Subscribe to our newsletter!
A quarterly newsletter that will keep you informed about all things Geosynthetics.
current Newsletter
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.

Resources

Pond Leakage Calculator

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

More

FAQs

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

More

Specifications & Guides

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

More

Geomembrane Guide

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

More