Analysis of consequences of landslide at the village of Kolchyno (Zakarpattia Oblast) on May 10, 2018
Students Name: Revenko Vladyslav Viktorovych
Qualification Level: magister
Speciality: Space Monitoring of the Earth
Institute: Institute of Geodesy
Mode of Study: full
Academic Year: 2020-2021 н.р.
Language of Defence: ukrainian
Abstract: Revenko V.V., Savchin I.R. (head). Analysis of the consequences of landslides in the village of Kolchyno (Zakarpattia region) on May 10, 2018. Lviv Polytechnic National University, Lviv, 2020. Extended annotation. Today, the monitoring of landslides and is very relevant and necessary to ensure the safe construction and operation of important engineering facilities, industrial enterprises, as well as in the study, forecasting and analysis of dangerous tectonic and geological processes. According to international statistics, approximately 80% of modern shifts are caused by human activities [4]. Landslides are usually arizen in areas formed by water-resistant and aquifers of the soil and occur due to imbalance in soils and underlying rocks, which can be caused by water leaching, weakening of rock strength during weathering and waterlogging by precipitation or groundwater, resulting in precipitation or groundwater. the adhesion on the displacement surface becomes less than the gravitational force acting on the mass of the rock. According to [1], the largest landslides in Ukraine occur on the Black Sea coast within the Odessa, Mykolaiv regions and the Autonomous Republic of Crimea, on the coast of the Sea of Azov and in the basins of the Seversky Donets (Donetsk region), Dnipro, Zhytomyr, Cherkasy, Zaporizhia and Mykolayiv region), Uzh, Tisa, Latorytsia, Rika, Tereblya, Teresva (Zakarpattia region) and basins of the Dniester, Prut, Cheremosh, Siret, Stryy, Vyshnya (Lviv, Ivano-Frankivsk, Chernivtsi regions). According to the latest data, there are 22,948 landslides recorded on the territory of Ukraine, the number of which changes due to liquidation (cutting, clearing), merging of some nearby landslides, either as a result of detection or formation of new ones. The greatest damage is caused by the development and intensification of landslides in urban areas with dense buildings and a significant population. The area of landslide development within urban areas is 483.6 km2. Active economic activity without carrying out the necessary engineering measures caused the development of landslides in 405 settlements, including Kyiv, Sevastopol, Dnipro, Kamyanske, Odessa, Chernivtsi, Lysychansk, Kupyansk and others [1]. To study landslides in Ukraine perform a number of tasks [3]: • clarification - on the basis of satellite information - the location of modern landslides; • tracking (in monitoring mode) activation of exogenous geological processes associated with landslides; • separation of landslide risk zones and areas within the Dnipro landslide zone. According to [2], recently, methods based on unmanned aerial vehicles (UAVs) are often used to study landslides. Such methods are safe from the point of view of labor protection and accident prevention as they are remote, and also provide the necessary accuracy and quality of results. The object of research is a part of the territory of the village of Kolchyno damaged by a landslide. The subject of the research is the analysis of the consequences of the landslide in the village of Kolchino. The goal of the research is to analyze the landslide in the village of Kolchino based on aerial survey data, establish quantitative and qualitative characteristics of soil landslides. The master’s qualification work presents an analysis of the consequences of landslides in the village of Kolchino, which took place on May 10, 2018. The results of aerial photography from the Trimble UX-5 UAV, as well as control and reference points, the coordinates of which were determined by the GNSS method, were used as initial data for the analysis. The work of aerial survey results in specialized software is processed and an orthophoto plan of the research territory with an accuracy of 6 cm / pixel is obtained. The zoning of the landslide area was carried out with the method of visual analysis. It is established that the research area can be divided into 5 main damaged areas: forest, garden, agricultural land, as well as houses and adjacent territory. As a result of the analysis of the boundaries and areas of the damaged zones, there are the forest zone 17779.5 m? (63.4%) that suffered the greatest damage, and the zone of houses 155.3 m? (0.8%) that suffered the least damage. The accuracy of area determination was in the range of 0.4-4.5%. It is established that the application of the presented algorithm in the study of landslides provides the necessary accuracy, reduces the time required for field measurements, and is safe for human life and health. References. 1. Exogenous geological processes [Ekzohenni heolohichni protsesy] [Electronic resource] // State Service of Geology and Subsoil of Ukraine [Sluzhba heolohiii ta nadr Ukrainy]. - 2016. - Resource: https://www.geo.gov.ua/ekzogenni-geologichni-procesi/. 2. Geoinformation monitoring of solid waste landfills[Heoinformatsiinyi monitorynh polihoniv tverdykh pobutovykh vidkhodiv]: dis. Cand. tech. Sciences: 05.24.01 - Geod /. - Lviv, 2019. - 181 p. 3. The results of research by scientists of the Academy of landslide processes within Kyiv: some results [Rezultaty doslidzhennia vchenymy Akademii zsuvnykh protsesiv u mezhakh Kyieva: deiaki pidsumky] [Electronic resource] // [Natsionalna akademiia nauk Ukrainy]. - 2017. - Mode of access to the resource: http://www.nas.gov.ua/UA/Messages/news/Pages/View.aspx?MessageID=2793. 4. Theoretical and experimental substantiation of the method of processing geodetic networks to determine the displacements and deformations of hydraulic structures[Teoretychno-eksperymentalne obgruntuvannia metodyky opratsiuvannia heodezychnykh merezh dlia vyznachennia zmishchen ta deformatsii hidrotekhnichnykh sporud]: dis. Cand. tech. Sciences: 05.24.01 - geod /. - Lviv, 2017. -134p.