Ievgenii Gerasimov

National university of water and environmental engeneering · Research Department

The paper presents the results of theoretical studies on turbulent water motion in pipelines, obtained by the analysis of experimental data regarding hydraulic patterns of turbulent flows. The authors suggest to evaluate the relevant parameters on the basis of the molecular and turbulent viscosity indicators, with the introduction of the conditiona...

This paper presents the need and scientific-methodical approaches to improving the calculation of the closed collector-drainage network of water discharge systems. Based on the application of the system methodology, the structure of the hierarchical and hydraulic connection between the water regime of the field and the operation mode of the closed...

Summarized data on an important scientific and applied problem, which is coming out in the development and justification of effective ways, technologies, and technical solutions of using warm waters from industry and energy in agriculture, are given. The use of surface heating with heat exchangers significantly affects the temperature regime of the...

Abstract: The presence of water, food and energy crises, both at the global and regional levels, as well as their deterioration under conditions of climate change, with an insufficient level of technical condition of existing irrigation systems, increase the strategic importance of irrigation as the guarantor of the agricultural sector sustainable...

Nowadays, water security becomes the first position in the list of directions that ensure sustainable agricultural production. So, modern water supply systems must take into account climate changes and guarantee the reliability of the water systems. This direction must be based on the rational water use standards, which provide for the reduction of...

The article discusses the option for the application of the methodology for the solution of boundary value problems on the conformal mapping for the calculation of filtration process in the horizontal systematic drainage, provided that the drain is installed at a different depth. In particular, the case of methods combining fictitious areas and qua...

The article considers issues of ensuring sustainable agricultural production by increasing reliability of an irrigation sys-tem and water security. The article describes results of hydraulic tests performed at the water outlet with a vertical move-ment valve member. Resistance coefficients and hydrodynamic effects at the water outlet were determine...

This study was carried out to assess the water quality of the Büyük Menderes River, as per the criteria of water quality index (WQI) by analyzing 15 physical and chemical parameters in 8 observation stations. The WQI method is considered as one of the most efficient methods of measuring the quality of water. Average WQI values were calculated betwe...

Monitoring of surface waters within the transboundary section of the Western Bug River showed, that during 2014–2018, a significant excess of the maximum permissible concentration (MPC) was observed for some substances for fish ponds. As a result of this, the water in the river for these substances was rated as “dirty” in terms of purity and corres...

The article presents the results of the analysis of the current state of weather and climatic conditions and evaluation of their predicted changes for immediate and distant prospects in the rice-growing zone of Ukraine. Studies were performed on the example of the Danube rice irrigation systems (RIS) in Odessa region with a total area of 13,678 ha,...

The use of low-temperature heat of industrial and natural origin for heating the soil in greenhouses allows practitioners to get very early vegetable and berry crops. The paper suggests a mathematical model of greenhouse heat exchange with a system of soil surface heating for substantiating the system structure and its efficiency in different condi...

The environmental assessment of the surface water quality of the Western Bug River has been made using the system of classification quality of land surface water of Ukraine in accordance with the approved methodology, which allows comparing water quality of separate areas of water objects of different regions. The calculation of the environmental a...

The article deals with the design of a conical filter for preliminary mechanical purification of water, which is located inside the pressure pipeline of a pumping station of steam turbine units. Filters for circulating pumps must ensure reliable ball cleaning and maintain minimum hydraulic resistance, and periodically flush the tapered filter nets....

One of the ways to ensure a reliable operation of irrigation systems is to protect them from water hammer (hydraulic shock) damage that occurs when starting or stopping a pumping station. This can be achieved by creating conditions in which a water hammer will not occur in the pressure pipeline as a result of closing the end gate valve (EGV). The a...

In modern conditions, there are cardinal climate changes on the Earth as at the planetary scale, as at the regional level. According to numerous hydrometeorological characteristics and indicators, climatologists specialists concluded that Ukraine also take place significant climatic changes in the last 10-25 years. In complicated natural-technical...

Представлено результати комп’ютерного моделювання розподілутемператури в грунті та приземному шарі повітря за умов поверхневого обігріву широкою оболонкою-рукавом. Отримані результати базуються на використанні математичної моделі, що складається з рівняння теплового балансу з врахуванням теплопровідності та конвективної складової, рівняння Нав’є-Ст...

In the article we developed the design principles and implementation of a complex model and optimized the design parameters of drainage. The study was based on the implementation of interconnected structural and technological forecasting simulation and optimization model blocks, which in turn allowed to justify the optimal design parameters and dra...

The situation when groundwater considerably rises above the “normal” level, water intake, lowering of groundwater levels and other relevant practical tasks require the drainage facilities. The most effective techniques of numerical studies of the corresponding boundary problems at present time are methods of dealing with inverse boundary value prob...