Issues in using geosynthetics in hydraulic structures under restoration

Granular filters were traditionally used as filter media in embankment dams. Now-a-days, Geosynthetics are being increasingly used as filter media in embankment dams. There are some critical issues that need to be addressed when geosynthetics are recommended in place of granular filters. Durability and service life of geosynthetics is an important concern, particularly when they are subjected to humid environment; and, inaccessibility for frequent inspection, and repairs if needed, are also a matter of concern. These issues are discussed in review paper. The focus is on use of geosynthetics in embankment dam restoration works in existing dams.