The Efficiency of Impervious Protection of Hydraulic Structures of Irrigation Systems

Abstract

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.

Improving operation of inter-farm channels

“…Observations showed that the UWC of the temporary channel and the UWC of the section channel are close to each other [7,8].…”

“…To further define the symbols "A" and "m" in the formula, it is necessary to observe in the calculation the numerical equality of each consumption symbol or consumption interval indicator with the experimental indicator. If the interval at one expenditure is greater than the experimental values but less for other intervals, they are taken into account in the calculation as an exception, and they are equalized at the expense of the auxiliary table [7][8][9][10][11][12][13].…”

“…The allotted plot is located in the middle of the channel. The channel test site has 3 side ditches, which were closed when the water flow was determined [5][6][7][8][9].…”

Influence of supported filtration on channel safety (based on the example of Swanley channel)

“…Within this context, one of the most significant challenges is the substantial loss of water within these irrigation canals, with filtration accounting for a substantial portion, often reaching up to 50% of the total water losses [2][3]. These losses incurred due to filtration in earthen canal systems have deleterious consequences, including canal area inundation, adjacent land swamping and flooding, salinization of the canal vicinity, and, in extreme cases, the cessation of canal functionality [4][5][6]. The extent of water loss attributed to filtration from these canals is contingent upon various factors, including the canal's specific parameters, the permeability characteristics of the underlying soil, the groundwater table elevation, among other variables [7].…”