Wyniki wyszukiwania - Biblioteka Nauki

1

Assessment of the energy and overall efficiency of the closed irrigation network of irrigation systems on the basis of the complex of resource-saving measures

100%

Kovalenko P. , Rokochynskiy A. , Gerasimov I. , Volk P. , Prykhodko N. , Tykhenko R. , Openko I.

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tom Special Issue

15--23

EN

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 development. This makes it necessary to increase, foremost, energy and overall (technical, technological, economic, and environmental) efficiency of the closed irrigation network of irrigation systems. In this regard, the complex that includes organisational-technological, technical, and resource-saving groups of measures was developed. Estimation of energy and overall efficiency of the closed irrigation network of irrigation systems at the implementation of developed complex were executed on the example of the agricultural enterprise located in the Petropavlovsk district of the Dnipropetrovsk region of Ukraine. For this purpose, machine experiment based on a use of the set of optimisation, forecasting and simulation models was implemented, including the model of climatic conditions, the model of water regime and water regulation technologies, as well as the model of crop yields on reclaimed lands. According to the obtained results, established that implementation of the complex reduces the consumption of irrigation water by 2.2-30.7% and electricity consumption by 12.9-38.2%. The rate of specific costs decreases from 1.6 to 1.32-1.47, and the coefficient of environmental reliability increases by 5.6-16.7%. At the same time, the profitability index increases from 1.07 to 1.75-2.57, and the discounted payback period decreases from 18 to 8-5 years.

2

Implementation of modern approaches to evaluating the effectiveness of innovation for water treatment in irrigation

100%

Rokochinskiy A. , Bilokon V. , Frolenkova N. , Prykhodko N. , Volk P. , Tykhenko R. , Openko I.

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tom no. 45

119--125

EN

The geographical location and climatic conditions of Ukraine cause the active development of land reclamation, as it enables to ensure stable and high yields. The complexity of forecasting in this area, namely the dependence of the results on the changing weather and climate conditions, does not allow to effectively use the standard instruments for justifying the investment for agricultural and land reclamation innovation. The necessity of improving methodological approaches to evaluating the effectiveness of investments in projects in the field of agricultural production and land reclamation was substantiated. The proposed approaches were tested on the advanced technology of water treatment in irrigation based on using a vibrating gravitation filter enabling to perform simultaneously the processes of water treatment and filter element regeneration. The obtained results clearly show that the advanced technology of irrigation water treatment and the developed for this technology design of the vibrating gravity filter are cost-effective. The current payback period for irrigation projects when using the purified water under this advanced technology is 5 years. It is the same as for the irrigation projects when using clean irrigation water. Thus, our proposed approaches to the evaluation of investments in new water treatment technologies applied in irrigation enable to adapt the modern methodology of analysis of economic and investment efficiency of projects to the domestic needs of agricultural production, namely to take into account the impact of changing weather and climate conditions on the resulting economic parameters.

3

Justification of Technological and Design Parameters of Polder Drainage Systems by an Optimization Approach

100%

Volk P. , Rokochynskiy A. , Volk L. , Chugai Y. , Tykhenko R. , Openko I. , Tykhenko O.

Archives of Hydro-Engineering and Environmental Mechanics

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2024

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tom Vol. 71, nr 1

27--41

EN

A system optimization method was used, which consists in the consistent justification of optimal technological and constructive solutions and parameters of drainage polder systems during the development of their projects. This is done in compliance with modern economic and environmental requirements according to criteria and models for different levels of management decision-making over time (project, planned operation). Based on the performed relevant predictive and optimization calculations for the conditions of the real object, the following three tasks have been accomplished. (1) The optimal pump module at the stage of operation for the existing polder drainage system has been substantiated. (2) The design of the pumping unit and the parameters of its components during the reconstruction of the polder drainage system have been improved. This made it possible to reduce the load on the pumping equipment, the duration of its operation, and the cost of electricity by 20–40%, depending on the water level of the year. The improvement was carried out by the diversion of the corresponding part of the surface runoff with additionally introduced gravity elements in the form of a puncture in the body of the protective dam and a siphon intake. (3) We have substantiated the optimal water regulation technology for the existing polder drainage system in modern and forecast weather and climate conditions, which will ensure the maintenance of the necessary water-air regime of the drained soils in different phases of the growing season of agricultural crops. This will make it possible, on demand, to increase the energy and general environmental and economic efficiency during their creation and functioning of the polder drainage system in accordance with modern changing conditions.

4

The variability of natural and climatic conditions in investment projects in the field of nature management

100%

Rokochinskiy A. , Frolenkova N. , Turcheniuk V. , Volk P. , Prykhodko N. , Tykhenko R. , Openko I.

Journal of Water and Land Development

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2021

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tom no. 48

48--54

EN

The article focuses on the actual scientific and practical problem of accounting for the influence of meteorological and climatic factors in the technical and economic calculations in the field of environmental management. It has been proven that the introduction of scientifically sound and effective methods of using meteorological and climatic information in economic calculations significantly reduces the loss caused by weather conditions and improves the implementation of an optimal strategy for agricultural production on reclaimed lands. Such calculations are based on economic and statistical modelling of different variants that accounting for standard hydrometeorological information in the implementation of design, management and economic decisions. This increases the validity and reliability of calculations, as well as their compliance with the actual operating conditions of environmental and economic facilities. Consequently, this attracts increased interest of both public and private investors. Not only under such conditions is a sustainable development of environmental management sectors possible but also the adaptation to global climate change and additional benefits from the efficient economic activity in the new environmental conditions.

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Differentiation in the value of drained land in view of variable conditions of its use

100%

Rokochinskiy A. , Volk P. , Frolenkova N. , Tykhenko O. , Shalai S. , Tykhenko R. , Openko I.

Journal of Water and Land Development

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2021

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tom no. 51

174--180

EN

The article is devoted to a topical scientific problem in modern conditions – valuation of land in Ukraine. The imperfection of the existing approaches requires further research on the changing conditions of land use and their impact on land pricing. A methodology for determining the market value of reclaimed land based on a differentiated assessment of its productivity through crop yields is proposed, taking into account natural and climatic zones and other conditions of a particular region. The basis of the methodology is the application of long-term forecast and a set of forecast and simulation models, in particular the model of area climatic conditions and the model of water regime and water regulation technologies on reclaimed land. At that the crop yield model as a complex multiplicative type model takes into account all main factors influencing crop yield formation: weather, climatic and soil conditions, cultivation techniques, water regime of reclaimed land, etc. The proposed approaches were tested by the method of large-scale machine experiment using a land plot in the zone of Western Polissya of Ukraine as the example. The obtained results indicate that there is a differentiation in land value, which is a proportional derivative of the yield of cultivated crops depending on the conditions of their cultivation. The variation range of the studied indicators in relative form by the ratio of maximum and minimum values to the weighted average value is for cultivated crops – 393%, and for the above soils – 44.6%. Thus, within one object, the estimated value of land in view of available soils and cultivated crops varies from USD2456∙ha–1 to USD4005 ∙ ha–1, averaging USD3522 ∙ ha–1 .

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Impact of Comparative Assessment of Soil Quality on Determining the Value of Agricultural Land (Ukraine)

84%

Tykhenko O. , Martyn A. , Tykhenko R. , Openko I. , Shevchenko O. , Tsvyakh O. , Rokochynskiy A. , Volk P.

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2024

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tom Vol. 25, iss. 4

252--261

EN

The article raises the issue of changes in the value of land plots depending on their quality characteristics. This study investigated the change in indicators of the monetary assessment of individual agricultural districts (NAD) in connection with the indicators of agricultural production groups of soil quality valuation score. Using the normative indicators of the monetary valuation of land plots, the normative monetary valuation was calculated for 10 natural and agricultural districts of the Kyiv region of Ukraine. Thus, in the Skvyrskyi NAD, the normative monetary value is UAH 37,950.08 per 1 hectare, and the average soil quality valuation score in this area was 55 points by level, which is the highest value of this indicator in the Kyiv region. The lowest credit rating score (15) was recorded in the Chornobyl-Borodyansky NAD, where the norm of capitalized rental income was UAH 10,347.52 per 1 hectare. From 42 to 110 agro-production groups of soils are counted in each of the NADs. Based on the Kyiv region, the average indicators of humus content range from 1.91 to 2.47 %. We established a directly proportional relationship between the soil quality valuation score and humus content, in particular, the correlation coefficient between these indicators ranges from 0.8743 to 0.9376. The research results can be used to carry out land evaluation works on agricultural land.