Calcutta Port Trust authorities in their development work at Haldia were suffering serious erosion problems to an island in the river. As part of their development programme they were investigating the use of geotextile filters. and had specified their requirement in terms of technical specification including strength and porosity which is critical in a filter application A woven cost effective jute geotextile impregnated with rot proofing compound was fabricated and an area covering 30,000 sq .mts was laid on the erosive banks of Nayachor island during 1992. Revetment filter is quite a sophisticated application involving dynamic flow and is relatively an permanent applicationt Efficiency of such application is primarily measured by silt formation. A good amount of siltation up to a height of 600 mm was observed after a period of eight months. Jute geotextile has withstood without any signs of failure.
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