METHODICAL APPROACHES TO THE DETERMINATION OF EVALUATION CRITERIA AND SELECTION OF THE DESIGN OF ANTI-FILTRATION SCREENS OF RESERVOIRS

The relevance of the issue is caused by the presence of significant (more than 20% of the normative indicators) filtration losses from most reservoirs built in Ukraine without anti-filtration protection. Based on the results of analytical and experimental field studies of the constructive elements of anti-filtration protection of reservoirs, calculations of structural parameters, and generalization of scientific research materials, the main areas and trends of improving screen structures of these reservoirs have been determined. It was established that the selection of the designs of anti-filtration screens is based on the optimization of the main indicators of the evaluation criteria of technically and economically expedient designs. The criteria for evaluating the anti-filtration protection design are filtration losses, filtration coefficient, coefficient of performance, coefficient of anti-filtration efficiency, filtering resistance of the structure, optimal parameters of the soil base (density and moisture) of different types of soils, an indicator of environmental safety, and technical and economic efficiency.  Creating new types of designs of anti-filtration screens for reservoirs was justified, and the trends of their improvement were specified. Methodical approaches to the selection of optimal screen designs were developed. Prospective designs of anti-filtration screens of reservoirs when using the latest materials and modern technologies are proposed. The design parameters of anti-filtration screens of artificial reservoirs were established depending on the depth of their filling and the physical and mechanical properties of the soil of the reservoir bowl base. The economic efficiency of new types of designs of anti-filtration screens, compared to the traditional ones, is in reducing filtration losses and increasing the efficiency water reservoirs.