The paper presents a comparison between persistent scatterer interferometry (PSI) monitoring results and the in situ displacement measurements. The landslide occurred after heavy rain event in November 1990. The material is Boršt hydrometallurgical waste deposit from the extraction process of the ammonium diuranate (yellowcake) from uranium ore, extracted at adjacent uranium mine Žirovski vrh. Although the landslide did not directly endanger people, site remediation works were undertaken due to the possible subsequent environmental problems. PSI campaigning in the Škofjeloško-Cerkljansko area, where the mining waste from the uranium ore mill is situated also detected displacements, most probably indicating a creeping process. The high correlation values between the movements of the benchmarks and the PSs confirm that the remediation works were effective as the fluctuations in the displacement values of the landslide were very similar to those of the PSs. Nevertheless, although there are several limitations in comparing the two different datasets, the PSI technique can be complementary to conventional in situ methods, mainly in areas where long term monitoring is required.
COBISS.SI-ID: 2234197
The paper describes part of results of the the I2GPS - a Galileo project that aimed to develop a novel device consisting of a compact active transponder (CAT) with an integrated global positioning system (GPS) antenna to ensure millimetric co-registration and a coherent cross-reference. The advantages are: (1) all advantages of CATs such as small size, light weight, unobtrusiveness and usability with multiple satellites and tracks; (2) absolute calibration for PSI data; (3) high sampling rate of GPS enables detection of abrupt ground motion in 3D; and (4) vertical components of the local velocity field can be derived from single-track InSAR line-of-sight displacements. A field trial was set to test the approach at a potential landslide site in Potoška planina, Slovenia to evaluate the applicability for operational monitoring of natural hazards. Preliminary results from the trial highlight some of the key considerations for operational deployments in the field. Ground motion measurements also allowed an assessment of landslide hazard at the site and demonstrated the synergies between InSAR and GPS measurements for landslide applications. InSAR and GPS measurements were compared to assess the consistency between the methods from the slope mass movement detection aspect.
COBISS.SI-ID: 2257749
We determined kinematic characteristics of the Idrija fault by geomorphological analysis of LiDAR data. 100 km long Idrija fault, striking N310° and dipping about 80°NE is often considered as the potential source of the 1511 M 6.8 earthquake. We examined in detail the Idrija fault trace along a 20-km-long swath in the central portion of the fault. Morphological evidences such as offset streams and ridges and major drainage abandonments suggest ongoing movement. At three sites, cumulative dextral offsets were measured (35 - 65 m, 140 m, 360 m) and significant vertical component was revealed by a rake ranging from 0 to 33°. The derived slip-vector is striking N303°–N310°. The slip-rate for the Idrija fault was estimated at about 1.5 mm/yr over the last 20 kyr.
COBISS.SI-ID: 2273877
Knowledge of conodont element function is based largely on analysis of morphologically similar P1 elements of few comparatively closely related species. A stereotypical pattern of rotational occlusion has been inferred, leading to the suggestion that this may represent a general model for ozarkodinin P1 elements at the very least. We tested the generality of this occlusal model through functional analysis of Pseudofurnishius murcianus P1 elements which are superficially similar to homologous elements in gnathodids. Our integrated functional analysis of several articulated clusters of P1 elements encompassed physical and virtual occlusal analyses, constrained by microwear and sharpness analyses. All of the evidence supports an occlusal model. Evidently, the rotational occlusal model is not general for P1 elements, even for ozarkodinins, and it is likely that among conodonts occlusal kinematics are as disparate as element morphologies. Attempts to elucidate the diversity of occlusal kinematics and, therefore, feeding ecologies of conodonts will be repaid by an understanding of the role of this important abundant and diverse clade in Palaeozoic and Mesozoic marine ecosystems.
COBISS.SI-ID: 2284373
During the exploitation of flyschoid rocks in quarries, the presence of karst features, e.g. cavities and phreatic channels in carbonate units, can be extremely hazardous. We evaluated the application of Ground Penetrating Radar (GPR) for detecting karst cavities and discontinuities that could form potential landslide surfaces in flyschoid rocks of the Rodež open pit mine in Anhovo. We recorded 21 profiles in 3 benches with the unshielded 50 MHz Rough Terrain Antenna (RTA) system, and correlated them with the results of detailed structural and lithological mapping of the area. We located several karst cavities and confirmed the presence of discontinuities with the interpretation of GPR profiles alone. However, their correlation with geological and structural data gave a more precise insight into the structural setting of the studied area. The different discontinuity families are mainly the result of the strike-slip tectonics and gradual anisotropic lithology. The complexity of the intersections of structural discontinuities and the mechanical properties of rocks contribute to the formation of sliding surfaces and the developing of karst features.
COBISS.SI-ID: 1435999