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    Wyświetlanie 1-4 z 4
    Tytuł:
    The Rogowiec Landslide Complex (Central Sudetes, SW Poland) : a case of a collapsed mountain
    Autorzy:
    Kasprzak, M.
    Duszyński, F.
    Jancewicz, K.
    Michniewicz, A.
    Różycka, M.
    Migoń, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/2059941.pdf
    Data publikacji:
    2016
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    landslide
    hillslopes
    digital terrain model (DTM)
    LiDAR
    geomorphometry
    electrical resistivity tomography
    Opis:
    The paper focuses on a large relict landslide complex in the northeastern part of the Kamienne Mts. (Sudetes, SW Poland) developed on Carboniferous and Permian volcanic and clastic sedimentary rocks. Whilst the presence of mass movements around Mt. Rogowiec has long been known, no attempts have yet been made to offer a comprehensive analysis. This study is based on recognition of geomorphic features from LiDAR-derived DTM, geomorphometric analysis, field geomorphological mapping, joint measurements at representative exposures, and electrical resistivity tomography. The total area affected by gravitational slope deformation exceeds 40 ha and consists of a few smaller units that show distinctive patterns of displacement. The eastern slopes of the Mt. Rogowiec ridge have been reshaped by large slides involving rigid blocks of trachyandesite in the upper part and deformed sedimentary successions in the middle and lower part. The central part of the area has experienced lateral spreading which resulted in complete disintegration of the volcanic cap. Fresh-looking ridge-top trenches indicate that this process is ongoing. Subsequent movements included flows into pre-existing valleys and rock wall collapses to produce spectacular block streams. The scale and variety of deformation structures at Mt. Rogowiec make this locality unique in the Sudetes.
    Źródło:
    Geological Quarterly; 2016, 60, 3; 695--713
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Case study of electrical resistivity tomography measurements used in landslides investigation, Southern Poland
    Autorzy:
    Mita, M.
    Glazer, M.
    Kaczmarzyk, R.
    Dąbrowski, M.
    Mita, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/100780.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Śląski. Wydział Nauk o Ziemi
    Tematy:
    electrical resistivity tomography
    ERT
    numerical modelling
    landslide
    mass movements
    elektryczna tomografia rezystywnościowa
    modelowanie numeryczne
    osuwisko
    ruchy masowe
    Opis:
    Mass movements are an ever present threat to building construction, water management, vegetation formation and biodiversity. This paper presents an approach to landslides research based on non-invasive geoelectrical method - Electrical Resistivity Tomography (ERT). Mapping and displacement monitoring of unstable slopes is crucial for the hazards prevention and assessment. The ERT technique is an effective tool to obtain structural differentiation of geological medium through interpretation of 2D electrical resistivity models. The main advantage of the method is a wide range of applicability what makes its useful during field works on a landslide. It is commonly used for measurements of slope instability, determination of shear surface, landslide susceptibility, depth of bedrock, slip plane geometry. The aim of the work is to identify the geological structures underneath three selected landslides in south Poland: in Racibórz, Milówka and Porąbka. Attempts have been focused on determination of the usefulness of the proposed ERT methodology for evaluation of possible further development of mass movements. On two investigation sites two different arrays have been used: Wenner-Schlumberger and dipole-dipole which allowed to prepare combined data set and resistivity models based on them. Forward modelling of synthetic models based on a priori information allowed to understand anomalies present on resistivity models. Applied approach ensured quality increase of final interpretation of resistivity models.
    Źródło:
    Contemporary Trends in Geoscience; 2018, 7, 1; 110-126
    2299-8179
    Pojawia się w:
    Contemporary Trends in Geoscience
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zastosowanie lotniczego skaningu laserowego i tomografii elektrooporowej w kompleksowych badaniach osuwisk : przykład z Pogórza Dynowskiego (Karpaty zewnętrzne)
    Application of airborne laser scanning and electrical resistivity tomography in a comprehensive research of landslides : example from the Dynów Foothill (Outer Carpathians)
    Autorzy:
    Kamiński, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2075338.pdf
    Data publikacji:
    2015
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    lotniczy skaning laserowy
    Metoda Elektrooporowa
    osuwisko
    Pogórze Dynowskie
    airborne laser scanning (ALS)
    electrical resistivity tomography
    landslide
    Dynów Foothill
    Opis:
    The study is focused on this part of the Dynów Foothiil, where many landslides are active. Extensive inventory work in the sites predisposed to development of landslides, initiated a search in order to improve traditional methods of mapping landslides. The traditional methods rely mainly on the analysis of topographic maps, geological and geomorphological mapping in the field. This article also descrobes the test of one of the modern methods of three-dimensional earth imaging – Airborne Laser Scanning. A major advantage of the method is the ability to filter out vegetation and other objects on the ground, which results in a precise terrain model. The relief inside the landslide consists of several secondary scarps and two lakes.The aim of the geophysical survey was primarily to interpret the geological structure of the landslides basement and the landslide body structure and to determine the depth of occurrence of the slide zone. It occurs at the shallowest depth in the upper part of the landslide, where Quaternary deposits are sliding down the slope of the surface of the top of variegated shales. The depth of slide surface increases significantly from the tectonic overthrust, where variegated shales are thrust on the hale-sandstone flysch layers of the Krosno Beds. In this part of the landslide, the slip surface can be at a depth of even 25 metres and is developed only within the flysch Krosno Beds.
    Źródło:
    Przegląd Geologiczny; 2015, 63, 7; 410--417
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wykorzystanie przypowierzchniowych badań geofizycznych w rozpoznaniu budowy geologicznej na przykładzie stref osuwiskowych w Karpatach
    Application of near-surface geophysical survey for recognition of the geology of landslide areas in the Carpathians - a case study
    Autorzy:
    Ostrowski, S.
    Rybak-Ostrowska, B.
    Lasocki, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2075010.pdf
    Data publikacji:
    2013
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    near-surface geophysics
    electrical resistivity tomography ERT
    ERT
    seismic refraction profiling
    landslide
    Outer Carpathians
    przypowierzchniowa geofizyka
    tomografia elektrooporowa ERT
    sejsmiczne profilowanie refrakcyjne
    osuwisko
    Karpaty zewnętrzne
    Opis:
    The paper presents three examples of application of geophysical surveys carried out by the PBG Ltd. for the recognition of internal structure, geological background and mechanical properties of near- -surface rock medium at major landslides in the Polish Outer Carpathians. Geophysical data were used for developing an accurate geological model of the landslides. Geological features that cannot be detected by other means, e.g. faults in bedrock, and exact location and shape of the shear plane were delineated in two-dimensional mode on the sections.
    Źródło:
    Przegląd Geologiczny; 2013, 61, 1; 67--73
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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