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VLDPE geomembrane stops canal seepage in Pakistan
The Pakistani Government's first effort to control waterlogging and salinity in the Punjab province was the Fordwah Eastern Sadiqia Irrigation and Drainage Project, located 300 km south of Lahore. The excessive water seepage through existing unlined canals depleted the much-needed surface water for agricultural use and caused salts to deposit on the surface, making the soil sterile. The project involved reconstruction of existing canals using a geomembrane as a seepage barrier. More than 464,500 m2 of a Poly-Flex 30 mil VLDPE liner, covered by a 7.4 oz/yd2 nonwoven needle-punched polypropylene geotextile, were used for lining over 110 km of production and experimental canals. Results of pre- and post-lining seepage tests show nearly no seepage through the lined canal as compared to a seepage rate of over 30 mm/day before lining. The extra surface water is now being used for irrigation of reclaimed land to increase agricultural productivity and income. The VLDPE liner system, at approximately 20 % of the total cost, was a key component for the success of this project. In time, the financial rewards of higher food production will exceed the cost of the geosynthetic lining system. A side benefit of this project was the employment of some 2,000 local people.
VLDPE geomembrane stops canal seepage in Pakistan
The Pakistani Government's first effort to control waterlogging and salinity in the Punjab province was the Fordwah Eastern Sadiqia Irrigation and Drainage Project, located 300 km south of Lahore. The excessive water seepage through existing unlined canals depleted the much-needed surface water for agricultural use and caused salts to deposit on the surface, making the soil sterile. The project involved reconstruction of existing canals using a geomembrane as a seepage barrier. More than 464,500 m2 of a Poly-Flex 30 mil VLDPE liner, covered by a 7.4 oz/yd2 nonwoven needle-punched polypropylene geotextile, were used for lining over 110 km of production and experimental canals. Results of pre- and post-lining seepage tests show nearly no seepage through the lined canal as compared to a seepage rate of over 30 mm/day before lining. The extra surface water is now being used for irrigation of reclaimed land to increase agricultural productivity and income. The VLDPE liner system, at approximately 20 % of the total cost, was a key component for the success of this project. In time, the financial rewards of higher food production will exceed the cost of the geosynthetic lining system. A side benefit of this project was the employment of some 2,000 local people.
VLDPE geomembrane stops canal seepage in Pakistan
VLDPE-Geomembran verhindert das Versickern von Wasser aus Bewässerungskanälen in Pakistan
Yazdani, A.M. (author)
Geotechnical Fabrics Report ; 19 ; 36-38
2001
3 Seiten, 6 Bilder, 2 Quellen
Article (Journal)
English
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