Geodynamics

Sidorov, Ihor; PERIY, S.; Sarnavskyj, V. H.

doi:10.23939/jgd2015.02.015

JGD

2015

DOI: 10.23939/jgd2015.02.015

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Geodynamics

Ihor Sidorov¹,

S. PERIY²,

V. H. Sarnavskyj³

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Cited by 5 publications

(1 citation statement)

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“…There is regular monitoring of the mo dern geodynamics of the Dnister Power Hydro Complex and its influence on deformations of engineering structures [Sidorov et al, 2015;Savchyn, Vaskovets, 2018;Savchyn, Pronyshyn, 2020;Tretyak et al, 2021a,b]. Special tectonic studies of the region [Sarnavski, Ovsiannikov, 2005] suggest that the reservoir filling causes an increase in the pressure on the sides of the Dnister Valley.…”

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confidence: 99%

Reservoir-triggered seismicity: case study of the Dnister Hydro Power Complex (Ukraine)

Tretyak,

Brusak,

Pronyshyn

2024

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The work considers the seismic activity around the Dnister Hydro Power Complex in the Dnister Reservoir area from 2012 to 2021. Maximum local magnitude of earthquakes for the studied period is ML=3.4. Hypocenters of earthquakes are at the depth of 1—3 km. They are located nearby to previously established faults and contacts of structures with a different lithological composition. Artificial water level regulation in the reservoir is related to the operation of the Dnister Hydro Power Plant and, according to our results, probably affects the occurrence of seismic events. Although the maximum water level changes only by 8.7 m, the region has increased natural seismicity and is located in the transition zone between 6th and 7th isoseims according to the seismic zoning map of Ukraine. Accumulated natural stresses can be triggered into earthquakes when there is a sudden change in water pressure. The seismicity of the region around the Dnister Reservoir was investigated for 10 years, taking into account the water level data in the reservoir, as well as comparing the location of earthquakes with the State Geological Map of the Crystalline Foundation. The profile of the State Geological Map of the Crystalline Foundation with the projected earthquakes hypocenters allowed to indicate that a significant number of earthquakes are located between different lithological structures. In order to assess the interrelationship between seismicity and water level changes in the reservoir, 111 periods of lowering or filling of the reservoir were selected. Parameters of seismic activity within the periods were calculated and analysed. Correlation between the sum of logarithms of energy with water volume changes and pressure changes in the Dnister Reservoir was established. Considering linear dependence it is possible to predict potential intensity of local seismicity caused by water level changes in the Dnister Reservoir.

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mentioning

confidence: 99%

Reservoir-triggered seismicity: case study of the Dnister Hydro Power Complex (Ukraine)

Tretyak,

Brusak,

Pronyshyn

2024

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Differentiation of recent local geodynamic and seismic processes of technogenic-loaded territories based on the example of Dnister Hydro Power Complex (Ukraine)

Savchyn

Pronyshyn²

2020

Geodesy and Geodynamics

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Geodynamics

Zyhar¹,

Savchyn²,

Yushchenko³

et al. 2021

JGD

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Purpose. The aim of the research is mathematical analysis and forecasting of dispersive soils behaviour based on the study of inclinometric observations data in the area of the natural-technical system of the Dnister PSPP. Methodology. The research methodology is based on mathematical analysis and modelling of processes occurring in the mountain massif on which the Dnister PSPP is located, using the finite element method. Results. The paper presents an analysis of the results of geotechnical monitoring of the behaviour of dispersive soils, implemented on the basis of inclinometric measurements on the territory of the Dnister PSPP. Quantitative parameters of horizontal displacement distribution in inclinometric wells are established. They made it possible to detect negative dynamics in the geological horizons N1-2ap and N1p+v, which is apparently caused by technogenic load caused by the Dnister upper reservoir. The behaviour of dispersive soils under the influence of natural and technogenic loads has been modelled. Based on the simulation results, the change of the sign of deformations under the influence of additional load, which can be the filling of the Dnister upper reservoir, is confirmed. Obviously, the use of this method alone does not allow full detecting and tracking modern geological, seismic and geodynamic processes. A combination and detailed analysis of different monitoring methods (geophysical, geodetic, parametric, vibrometric, hydrogeological, temperature, visual-instrumental and others), as well as modelling the behaviour of the object under the influence of natural and technogenic factors is optimal. Such simulations could be used in the design of other objects of this type, so this is a promising area for further research. Originality. For the first time, a mathematical analysis and forecasting of the behaviour of dispersed soils in the area of the natural and technical system of the Dnister PSPP was conducted on the basis of studying the data of inclinometric observations. Practical significance. The proposed technique can be used in the design of other objects of this type, as modelling the behaviour of the object under the influence of natural and technogenic factors makes it possible to assess possible risks and prevent them.

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Geodynamics

Cited by 5 publications

References 5 publications

Reservoir-triggered seismicity: case study of the Dnister Hydro Power Complex (Ukraine)

Reservoir-triggered seismicity: case study of the Dnister Hydro Power Complex (Ukraine)

Differentiation of recent local geodynamic and seismic processes of technogenic-loaded territories based on the example of Dnister Hydro Power Complex (Ukraine)

Geodynamics

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