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    Electromagnetic methods to characterize the Savoia di Lucania waste dump (Southern Italy)

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    The aim of this work is the joint application and integration of non-invasive geoelectrical methods for studying the landfill of Savoia di Lucania (Southern Italy). This landfill for its engineering features and small dimensions (70 m · 30 m · 6 m) represents an optimal test site to assess a geophysical survey protocol for municipal solid waste landfills investigation and monitoring. The landfill of Savoia di Lucania has been built with a reinforced concrete material and coated with a highdensity polyethylene (HDPE) liner. Three electrical resistivity tomographies (ERT), two self-potential (SP) map surveys and one induced polarization (IP) section have been performed, both in the surrounding area and inside the waste landfill. The geophysical investigations have well defined some buried boundaries of the landfill basin and localized the leachate accumulation zones inside the dumpsite. Comparison of our results with other engineering and geological investigations could be the key for evaluating the integrity of the HDPE liner. Finally, the joint use of the ERT, IP and SP methods seems to be a promising tool for studying and designing new monitoring systems able to perform a time-lapse analysis of waste landfill geometry and integrit

    Geophysical characterisation of Carlo's V Castle (Crotone, Italy)

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    The Carlo's V Castle, located in Crotone Town, on the Ionian coast of the Calabria Region (Italy), date back to the 13th century d.C. (Fig. 1). During its long life, the building changed several owners and sustained the damages and the consequent reconstructions due to the innumerable naval battles. Moreover, the castle suffered the action of the earthquakes which always afflict the region. With the principal aim of detecting the location, depth and geometry of the rests of destroyed structures, a systematic Ground Penetrating Radar (GPR) survey was carried out in the area inside the boundary walls. The results are sixty-two one-meter-spaced, filtered and migrated radargrams arranged in four 3D data-sets. From each data-set, the most significant time-slice was extracted. To reduce the ambiguity in the GPR data interpretation, additional geophysical techniques, such as Magnetic (M), and Electrical Resistivity Tomography (ERT), were carried out with a partial superimposition with the GPR data. A comparison and a joint interpretation amongst different geophysical data pointed out some very remarkable features associated to buried remains and possible buried cannonballs. With the secondary aim to check the presence of an old military walkway linking two bastions a GPR profile was carried out on the sea side boundary wall. The GPR results are in agreement with an ERT survey carried out on the same profile and consistent with the presence of an underground passag

    Geophysical investigations in the Castle of Crotone (Calabria Region, Italy)

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    This work is about geophysical investigations carried out in the Carlo V king's castle, in Crotone village (Calabria Region, Italy). A magnetic method (M), ground penetrating radar (GPR) and electrical resistivity tomography (ERT) surveys have been used to locate buried remains and old walkway. Each interesting area was investigated with a map survey, which is obtained acquired along several parallel profiles. Therefore, a 2D magnetic maps and a 3D GPR and resistivity data have been obtained. Finally, the ERT and GPR results showed some features associated to buried military walkway

    Municipal Waste Dump Geophysical Investigation

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    The proposed work is about the geophysical survey applied in three Italian waste dump (Savoia di Lucania and Pallareta in Basilicata region, Novellara in Emilia-Romagna Region). The Basilicata landfill are provided of HDPI liner while in the other one a compacted clay stratum is present at the bottom. In each site we carried out active and passive geophysical techniques: electrical resistivity tomographies (ERT), induced polarisation (IP), self potential (SP) and magnetic methods. The ERTs, inverted by using the Res2DInv software, provided information about the geometry of the waste basins where an HDPI liner is present. The IP results show high chargeability nuclei into the refuse indicated the metallic garbage cumuli. The SP signal is negative into the basins and slightly positive in the surrounding area. Moreover, the SP data show strong spikes at the borders of the basins. The SP data of Novellara waste dump (clay stratum coating) show positive values inside the basins. The magnetic method evaluates the dispersion of metallic garbage close to the waste dumps. Finally, the different acquired data allow to sketch the lateral and buried geometry of the waste basins and to infer their leachate-tight, at least where the HDPI liner is present

    UAV-based high-resolution mapping of a complex landslide: an example from Basilicata, Southern Italy

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    This paper accompanies a UAV-based geological-geomorphological map (1:1,000 scale) of a complex landslide periodically re-activated, localized not far from the town of Potenza in Basilicata, southern Italy. A fixed-wings eBee drone equipped with a conventional digital RGB photocamera (senseFly S.O.D.A.) was used to collect airborne digital elevation models (DEMs), orthophotos, and density point clouds in 2014 and 2018. The two photogrammetric surveys helped us to quickly detect the features of the new mass movement episodes. Three Google Earth Pro orthophotos filled the lack of information of the years in between. Topographic contours of the landslides with their morphological scarps and geological data from the 2018 field survey were processed using free and open-source software QGIS 3.22.4. For graphic adjustment and the final layout, the main map was imported into Adobe Illustrator CC 2018 and CorelDraw and embedded into an A0 map frame. The geological-geomorphological map reports a detailed representation of the bedrock geological structures, the ancient landslide bodies now stabilized, and the recent landslides occurred from 2014 to 2018 as deduced by the multitemporal analysis. Geomorphic features and facies analysis allowed us to interpret as debris flows and mud flows the depositional processes responsible for the genesis of the landslide bodies reaching the thalweg of the Basento River
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