The Efficiency of Impervious Protection of Hydraulic Structures of Irrigation Systems

To prolong the service life of hydraulic structures of irrigation systems and dams there were developed and patented method and device of creating impervious coating of irrigation channels, impervious geotextile coating of low-pressure earthen dams, a device for sealing butt joints of trays providing recovery of water conveyance constructions, operational reliability and durability of impervious coatings, elimination of filtration and leakage in water conveyance constructions. On channels, the result is achieved by using a two-layer coating made of geotextile with a concrete filler. To restore the operational reliability of the butt joints an impervious geotextile coating with a rubber seal is proposed to use. The reliability and durability of impervious geotextile coating for a low-pressure earthen dam are provided by a cellular structure consisting of a bed with a soil filler. Growing from the crest to the foot of the dam, the height of the bed cells eliminates the slipping of the filler which, in turn, prevents the geotextile bed from being damaged. Special attention should be paid to the activities that ensure the reliability and durability of the constructions without decommissioning them. The important task of protection and increase of exploitation safety of reclamation systems and constructions includes the application of modern technologies adaptable to various conditions of reclamation systems exploitation and structural peculiarities of reclamation technologies that provide long-term reliable protection while reducing economic and energy costs. The positive value of the net profit value (NPV) for the period of its use was adopted as a criterion for the effectiveness of the proposed technical operation.