The seismic micro-zoning of the area of the main structures of Kaniv HPP

Abstract

Summary The geological structure, geological-geophysical and seismotectonic characteristics of the area of the main structures of Kaniv HPP are given. The seismotectonic substantiation of the selected zones of possible earthquake foci (PEF) in the conditions of the ancient platform is given. A brief description of seismically active areas that affect the seismicity of the area of the Kaniv HPP, in particular the Crimea and the Carpathians (Vrancea zone). Quantitative assessment of design (DE) and maximum estimated (MEE) earthquakes for Kaniv HPP has been made. The results of seismic micro-zoning (SMZ) by the method of seismogeological analogies and the following instrumental methods are given, namely the registration of high-frequency microseismics, earthquakes and explosions and the method of seismic stiffness. The seismic equipment used for engineering geophysical searchings and methods of field observations is presented. The increments of seismic intensity by the ratio of amplitudes of microseismics registered at the study site and at the reference point, the speed of propagation of seismic waves in geological horizons are determined. The increments of the intensity of seismic shaking (intensity scale) were calculated by the method of seismic stiffness, the increase of seismic intensity due to the influence of the depth of the groundwater level.