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oa Risk assessment of landslides and debris flows during the construction and exploitation of the Volovets wind farm in the Western part of the Polonina Borzhava (Zakarpattia region, Ukraine)
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, Second EAGE Workshop on Assessment of Landslide Hazards and impact on communities, Sep 2020, Volume 2020, p.1 - 5
Abstract
The choice of the Western part of Polonyna Borzhava for the construction of wind farms stems from the highest wind energy potential in Ukraine in the Carpathian region, which was mentioned in the planning scheme of the Transcarpathian region. Determinants of the complexity of engineering and geological conditions in the study area are mountainous terrain, its high absolute marks - from 1100 to 1700 m above sea level, significant steepness of slopes, seismicity of the Carpathian region and proximity to the Vrancea zone, heterogeneity and mostly monoclinic occurrence of flysch. Selected areas for the construction of 34 wind turbines are characterized by minimum values of the thickness of Quaternary sediments from a few centimeters to 3.5 m, with most future construction sites not exceeding 1 m. The project of construction of a 120 MW wind farm, laying of high-voltage cable, reconstruction of the road will be developed based on the principles of minimizing the negative impact on the environment, maximum preservation of soil and vegetation layer using ecomat technology, trenchless cable laying technology and maximum removal and preservation is technically possible to do, namely the removal and temporary storage of turf in 34 allotted areas with industrial turf, which can cut the turf into strips to a depth of 8–10 cm, suitable for twisting into rolls and temporary storage in the area of 10x30 m on the periphery of each plot.
Comprehensive engineering-geological and hydrogeological surveys conducted by Geol-Tech LLC showed that the geological factor influences as the main protector from possible unfavorable scenarios of landslides and mudflows, which together with the envisaged engineering protection measures, practically prevents negative consequences.
