Annotation

Purpose: justification of irrigation canal impervious linings use with new materials and methods for their calculation. 

Materials and methods. The proposed improved and new designs of impervious linings for irrigation canals were the materials for research. To determine the specific filtration flow, the calculation methods of free and backed filtration for concrete-film linings of irrigation canals with damage in the polymer geomembrane, taking into account moisture contours and partial soil saturation with water at the canal base were used. 

Results. Among the considered designs of canal linings, the best indicators were obtained for linings with bentonite mats and a protective coating of rockfill and geotextile. The bentomat is distinguished by its ability to regenerate (self-healing), which ensures the creation of a reliable lining with high impermeability. The calculations of free filtration for BSK-III with partial soil saturation with water at the canal base made it possible to determine the losses for filtration, which amounted to 9.72 sq. m/day, with a deviation of the results obtained from the experimental values of 7.0 %. 

Conclusions. Six improved and new designs of canal linings with a geomembrane and protective coatings made of concrete and rockfill are presented, as well as calculation methods for free and backed filtration through the canal lining. An analysis of the calculated data showed that free filtration takes place in two channels - BSK-III and the Main Kakhovskiy, this is confirmed by a significant depth of groundwater (more than 15–30 m); on other objects, backed filtration with a groundwater depth from 2 to 7 m is observed.

doi: 10.31774/2712-9357-2022-12-3-210-226

For quoting

Коlganov А. V., Коsichenko Yu. М., Sklyarenko Е. О. Impervious canal linings using geosynthetic materials. Land Reclamation and Hydraulic Engineering. 2022;12(3):210–226. (In Russ.). https://doi.org/10.31774/2712-9357-2022-12-3-210-226.

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