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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

2024

tom Vol. 71, nr 1

27--41

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.

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

2021

tom no. 51

174--180

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 .

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.

2024

tom Vol. 25, iss. 4

252--261

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.