Improving the system of technical diagnostics and environmentally safe operation of soil hydraulic structures on small rivers

Hapich, H; Pikarenia, Dmytro; Orlinska, Olha; Kovalenko, Volodymyr V.; Rudakov, Leonid M.; Chushkina, Iryna; Maksymova, Nataliia; Makarova, Tetiana; Katsevych, Victoriia

doi:10.15587/1729-4061.2022.255167

Cited by 5 publications

(5 citation statements)

References 9 publications

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“…Similarly with [21], [22], geophysical surveys using natural pulse electromagnetic field of the Earth and vertical electric sounding were carried out in 2016 and 2022. Results of the activities, which took part in 2016, have helped identify the ways of RAW filtration migration through the HS body and base as well as define the areas where soil of the protective dam differs in stress, suffusion zones, water saturation sites etc.…”

Section: Figure 1 Areal Scheme Of the Dniprovske Tailing Pond Locatio...mentioning

confidence: 99%

Analyzing stability of protective structures as the elements of geotechnical tailing pond safety

Tymoshchuk,

Rudakov,

Pikarenia

et al. 2023

Min. miner. depos.

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Purpose is the assessment of soil retaining wall stability to ensure geotechnical safety during the radioactive waste tailing pond closure and further recultivation (or rehabilitation) in Kamianske town (Ukraine). Methods. Geomechanical stability of the protective structure has been assessed relying upon the analysis of geological-hydrogeological, engineering-geological, and geotechnical conditions of the certain tailing pond area using a deformation elastic-plastic model of a medium implemented on the basis of finite-element method. For the purpose, the dam slopes have been detalized taking into consideration their geometry as well as changes in vertical section of rock material characteristics in accordance with the earlier geophysical studies; exploration drilling; and engineering-geological surveys. Findings. Stability coefficients of protective tailing pond dam have been identified within the typical areas of a hydraulic structure; it provides high reliability and representativeness of the whole structure health in time as well as under various conditions of the industrial waste water saturation. It has been defined that the stability coefficients varies from ks = 1.372 to 4.758. Comparison of the indicators between 2022 and 2016 demonstrates a tendency of the slope stability coefficient decrease due to water saturation and groundwater level rise. Nevertheless, design characteristics of the structure make it possible to ensure satisfactory a stability coefficient along the whole dam length being 1.13 times higher than the standard one (i.e. ks = 1.250). Originality. The dependence of the tailing pond protective dam stability upon a water supply degree at the forecasted groundwater level rise at the expense of atmospheric and melt water ingress to the tailing pond has been defined. The danger of complete radioactive waste water saturation is a significant reduction in the stability coefficient of the protective structure, which can be supported by predictive modelling data. If strength parameters of a dam material decline for the most critical area then the strength coefficient decreases starting from 1.532 in terms of the current groundwater level down to 1.372 as for the forecasted dam water supply. The figure is more than 10% of its initial stability. Practical implications. The obtained results substantiate the necessity; moreover, they are of practical value while improving hydrological, hydrogeological, and geotechnical monitoring of the analyzed tailing pond to ensure its radiation safety under different conditions of further behaviour during closure, recultivation, or rehabilitation.

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Section: Figure 1 Areal Scheme Of the Dniprovske Tailing Pond Locatio...mentioning

confidence: 99%

Analyzing stability of protective structures as the elements of geotechnical tailing pond safety

Tymoshchuk,

Rudakov,

Pikarenia

et al. 2023

Min. miner. depos.

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“…The NPEMFE method allows for the recording of the destruction of rocks in the microcrack development stage by recording the characteristic pulsed electromagnetic signal. This unique feature of the method provides its high sensitivity and informativeness and allows for shortterm (from several hours to several months) forecasting of catastrophic phenom ena [13].…”

Section: Introductionmentioning

confidence: 99%

“…For theoretical and experimental evidence of the applica tion of NPEMFE to identify zones of loosening and wetting in the body of canals and regulating pools of irrigation sys tems, the nature of the change in amplitude during the trans fer of uniaxial static load to bulk soil samples was studied. Such experimental studies on the idealized model are a justi fication for the possibility of assessing the technical condition of canals and regulating pools of irrigation systems by NPEMFE [13].…”

Section: Introductionmentioning

confidence: 99%

Prospective methods for determining water losses from irrigation systems to ensure food and water security of Ukraine

Hapich¹,

Orlinska²,

Pikarenia³

et al. 2023

Nauk. visn. nat. hirn. univ.

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Purpose. To develop a complex system for technical diagnostics of soil hydrotechnical structures of irrigation systems for operative identification of damaged sites, reduction of nonproduction water losses, and maintaining ecological and economic efficiency of the hydroeconomic national complex in the context of water and food security. Methodology. The result of the represented scientific study is reached by complex application of geophysical methods of the Earth’s natural pulse electromagnetic field (NPEMFE) and vertical electrical sounding (VES). That allows determining qualitative indices and parameters of the damaged sites of hydrotechnical structures and water filtration paths. Mathematical methods for determining quantitative parameters of filtration losses are applied. Analytical and technoeconomic comparison of some most widely used methods with the complex of techniques proposed in the study are performed. Findings. Field studies and analytical calculations helped determine that, depending on the design parameters of retention basins and modes of their operations, water losses are from 50 to 60 m3/month per 1 m of the structure length. In some cases total filtration losses per month can reach up to 100 m3 per 1 m of the length. As for the monetary equivalent, in terms of average water cost being 0.12 EUR/m3, water loss in one standard retention basin with the conventional dimensions of 100  100 m is EUR 2.5 thousand per month (EUR 12.5 thousand per season). Originality. The possibility of using a complex of geophysical methods for diagnosing technical conditions of soil dams of retention agricultural basins has been substantiated scientifically. The complex is of high informativity making it possible to determine rapidly the sites with increased filtration in the hydrotechnical objects. According to the comparison of the available models for evaluating possible filtration losses from the retention basins of irrigation systems, the parameters of estimate indicators, ensuring high reliability of the results, have been substantiated. Practical value. Point determination of the sites with filtration water losses makes it possible to focus the repair and renewal operations on the most damaged sites that reduce considerably the time and costs along with the increase in general efficiency of the irrigation system operation.

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“…As a rule, they were built on large and medium-sized rivers and, unfortunately, a signifi cant number of them do not function today. Instead, the State Agency of Water Resources of Ukraine has introduced a project in the form of an interactive online map that provides open access to data on quality indicators and environmental assessment of water in the control section lines of observations [19,20]. Thus, with a total of more than 5,000 rivers and streams within the Dnipropetrovsk region, according to the interactive map, only ~50 observation posts are active.…”

Section: Introductionmentioning

confidence: 99%

Study of fragmentation impact of small riverbeds by artificial waters on the quality of water resources

Hapich¹,

Andrieiev²,

Kovalenko³

et al. 2022

Nauk. visn. nat. hirn. univ.

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Purpose. Study the spatial distribution of artificial reservoirs in the Dnipropetrovsk region and fragmentation impact of small riverbeds on changes in the quality of water resources. Methodology. Field studies on the current state of small river basins were carried out, rivers were selected on the principle of different geographical location and levels of anthropogenic impact. Analytical laboratory studies of water salt composition and methods of mathematical analysis were used to establish the dependence coefficients of water mineralization level and fragmentation of the river basin on the water flow regulation. Findings. The structure of the spatial distribution of artificial reservoirs in the administrative districts of the region and their hydrological characteristics are generalized. It is shown that small volumes of accumulated water in relation to the total area of reservoirs are the cause of intensive heating and evaporation of water. Due to this, the hydrochemical parameters of water are worsen, which affects the environmentally safe water use. It was found that the level of mineralization, the content of sulphates and chlorides exceed the maximum acceptable concentrations in all studied rivers. There is a tendency of deterioration of water quality in the salt block, especially in rivers with significant regulation of artificial reservoirs. In this case, water salinity exceeds the norm by 712 times. Indicators of water mineralization of rivers with fewer ponds and less fragmentation of the river basin exceed the standards by 25 times. Originality. It is determined that among the main factors of anthropogenic impact on the state of aquatic ecosystems is the fragmentation of riverbeds by artificial reservoirs, which turned rivers into cascades of water evaporating ponds. There is a close relationship between the factors of water flow regulation and the level of water mineralization (coefficient of determination R2 =0.62), as well as the coefficient of fragmentation of the river basin (R2 = 0.61). This proves the possibility, in the conditions of research of small rivers, to estimate the degree of change (increase) of water mineralization level by the coefficient of water flow regulation Kw and the coefficient of river fragmentation by the area Practical value. The main directions and ways to normalize the ecological status of watercourses are given. The necessity of systematic study of the current ecological condition of small rivers of Dnipropetrovsk region and their basins is determined.

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Improving the system of technical diagnostics and environmentally safe operation of soil hydraulic structures on small rivers

Cited by 5 publications

References 9 publications

Analyzing stability of protective structures as the elements of geotechnical tailing pond safety

Analyzing stability of protective structures as the elements of geotechnical tailing pond safety

Prospective methods for determining water losses from irrigation systems to ensure food and water security of Ukraine

Study of fragmentation impact of small riverbeds by artificial waters on the quality of water resources

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