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Monitoring mass movements using Network-RTK measurement technique and producing potential rockfall scenarios in a paleo-landslide area

Kadi Fatih, Akin Alper Tunga, Usta Ziya

Reports on Geodesy and Geoinformatics

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2023

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Vol. 115

9--17

EN

Mass movements resulting from landslides cause significant losses in terms of lives and property. Periodic observations of these movements using geodetic measurement techniques help to prevent these losses. Network-RTK measurement technique produces real-time location with centimeter accuracy, based on phase observations using a network of reference stations. In this study, the paleo-landslide area in the Işıklar location of Trabzon province, Esiroğlu district, Turkey, was chosen as the application area. This study aims to measure the application area between 2019 and 2021, using the Network-RTK technique to determine the mass movements. Additionally, there is a rock block in an area with a steep slope. The possible movement of this rock block is a threat to infrastructure facilities, residential areas, agricultural areas, and life safety if the mass movement continues. Within this scope, the potential movement scenarios of the block were produced using RocPro3D software and UAV photogrammetry. Scenarios following an ongoing mass movements in the region triggering another mass movement are discussed. In the light of the results obtained, mass movements in the vertical direction of up to 28 cm were detected in the area where the rock block is located in the last 2 years. The periodic continuation of mass movements in the study area, declared a disaster-prone area, confirms the importance of the rock block in the region. In another phase of the study, possible movement scenarios of the rock block were examined using a rockfall analysis. In this context, with the help of an unmanned aerial vehicle, a digital elevation model and orthophoto map of the region where the rock block is likely to move was produced and a base map to be used in rockfall analysis was obtained. As a result of the rockfall analysis, maps showing the speed, energy, spread, possible impacts, and stopping points were produced. With the examination of these maps, it has been determined that residential areas, agricultural areas, and infrastructure facilities in the study area may be significantly damaged.

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Skala OMI.pl

Jeż Tomasz, Flieger-Szymańska Michalina, Kędzierski Miłosz

Przegląd Budowlany

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2021

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R. 92, nr 11-12

68--71

PL

Autorzy zaproponowali nową skalę służącą do porównywania ze sobą ruchów masowych różnego typu. Okazuje się, że skala OMI, bo tak ją nazwano, ma pewne mankamenty. Specyfika ruchów masowych rejestrowanych w Polsce, głównie ich mniejsze rozmiary oraz brak ofiar śmiertelnych, powoduje, że w „ogólnoświatowej” skali OMI polskie ruchy masowe mają zbliżone do siebie niskie noty. Wobec tego zdecydowano się na wprowadzenie lokalnej skali OMI dla Polski (OMI.pl), w której bierze się pod uwagę typowe dla naszego kraju rozmiary ruchów masowych i ich skutki. Artykuł przybliża sposób oceny ruchów masowych według skali OMI.pl.

EN

The authors proposed a new scale for comparing mass movements of different types with each other. It turns out that the OMI scale, as it was called, has some drawbacks. The specificity of mass movements registered in Poland, mainly their smaller size and the lack of fatalities, mean that on the „global” scale of the OMI, Polish mass movements have similar low scores. Therefore, it was decided to introduce the local OMI scale for Poland (OMI.pl), which takes into account the sizes of mass movements typical of our country and their effects. The article presents the method of assessing mass movements according to the OMI.pl scale.

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Nowy sposób oceny ruchów masowych przy użyciu skali OMI

Dziadosz Sylwia, Jeż Tomasz, Flieger-Szymańska Michalina

Przegląd Budowlany

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2019

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R. 90, nr 10

78--80

PL

Na podstawie analizy wybranych przypadków katastrof osuwiskowych oraz literatury przedmiotu podjęto próbę zdefiniowania autorskiego pojęcia geomorfologicznego OMI (Osuwiska Medialnie Istotnego), które wprowadza specyficzną metodę klasyfikacji ruchów masowych w 10-stopniowej skali. Na podstawie opracowanych przypadków i analizy statystycznej danych sporządzono wzór kategoryzujący ruchy masowe, podobnie jak się to czyni w przypadku trzęsień ziemi, huraganów, czy innych zjawisk przyrodniczych o znamionach klęski żywiołowej. W publikacji przedstawiono wykorzystanie skali OMI do porównania kilku wybranych przypadków.

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Ruchy masowe czy osuwiska – próba usystematyzowania terminologii

Jeż T.

Przegląd Budowlany

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2017

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R. 88, nr 10

108--112

PL

W związku z zaobserwowanym brakiem ładu w literaturze tematu autor przeprowadza próbę uporządkowania terminologii związanej z podziałem ruchów masowych. Dokonuje również próby dotarcia do granic tego pojemnego terminu.

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Numerical methods for vibration analysis of Timoshenko beam subjected to inertial moving load

Dyniewicz B., Bajer C. I.

Vibrations in Physical Systems

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2010

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Vol. 24

87--92

EN

The paper deals with the problem of modeling of the moving mass particle in numerical computation by using the finite element method in one dimensional wave problems in which both the displacement and angle of the pure bending are described by linear shape functions. The analysis is based on the Timoshenko beam theory. We consider the simply supported beam, in a range of small deflections with zero initial conditions.

PL

Praca omawia problem modelowania numerycznego poruszającej się cząstki masowej metodą elementów skończonych w zadaniu jednowymiarowym. Przemieszczenia i obroty opisano liniowymi funkcjami kształtu. Analizę oparto na teorii belki Timoshenki.

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Jaskinia szczelinowa Diabla Dziura w Bukowcu [Pogórze Rożnowskie, Karpaty zewnętrzne] jako inicjalne

Margielewski W., Urban J.

Przegląd Geologiczny

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2004

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Vol. 52, nr 12

1171--1178

EN

Diabla Dziura cave-the deepest pseudokarst cave (42 m) of the Polish Outer Carpathians (Rożnów Foothill) represents a tension crack of the initial stage of landslide development. Several types of gravitational movements - spreading, toppling, rotational - have been observed in the cave. They will gradually evolve into a landslide. The joints system of the cave is featured by zonality. All joint sets (L, T, D1, D2) occurring in the massif are present in the complete relaxed, upper part of the massif (to the depth 10-12 m), whereas the set D2, parallel to the mountain ridge stretching, predominates in the deeper part. To the depth 25 m the joint surfaces are often slightly curved, deeper they are straight and even. The main passages of the cave represent polygenetic joints, developed due to tensional stresses operating within the ridge. Curved shape of the joint surfaces is an effect of correlation between foundations of jointing (combination of tectonic and denudational-unloading stresses) and a way of their opening, generated partly by tectonical extension, partly by denudational factors in the upper part of the ridge. Also the lithological character of the rock massif (thick-bedded sandstone) could play a significant role in formation of these curved surfaces.