Riviste Online SApienza - R.O.SA - 2 (Sapienza University of Rome)
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Geological Hazards and Cultural Heritage: the 2014 San Leo Landslide (Northern Apennines, Italy) and Its Implications
No full textThe San Leo Cliff in the Northern Apennines, Italy: slope instability and risk mitigation measures after the 2014 landslide
No full textThe medieval town of San Leo and its fortress have been classifi ed as a “settlement to be consolidated”, following the Italian law. They rise on a rocky, steep cliff that is prone to failure, as well as the entire area surrounding the cliff is subject to slope instability phenomena. Over the past seventy years, a series of consolidation works have been conducted on the rock walls. These interventions focused mainly on the south face, where the town and its access road are located, and on the east face, particularly in the area where the fortress is situated. Since the 1980s, efforts to reduce the risk have also focused on the base of the cliff with the aim to prevent its erosion and undermining. The latter is considered the cause of major rock failures, such as the landslide that occurred in 2014. Despite past interventions, however, landslide risk in the San Leo cliff still remains high. The slope failure of 2014 marks a dividing line: after that a comprehensive multidisciplinary study was started. The study involved different investigation and monitoring techniques in order to understand, prevent, and reduce landslide risk. The in-depth knowledge gained through this study was crucial in managing the emergency after the collapse, providing the essential elements for defi ning risk scenarios and for planning and designing interventions to reduce risk after the emergency phase. These interventions were carried out on the north face of the cliff, where the main landslide occurred in 2014, but also the east and south faces
On the presence of fluvio-lacustrine deposits on the Pomarico hill (Matera): interpretation and engineering geology relevance
No full textThe village of Pomarico stands on top of a ridge between the valleys of the Bradano and Basento Rivers (Southern Italy) and is formed by the terms of the Plio-Pleistocene marine regressive cycle of the Bradanic Foredeep. In this area, the presence was observed of post-regressive alluvial facies in non-conformable contact with the underlying formation. This paper, based on an extensive engineering geological survey, reports the find of deposits rather different from those typical of the local stratigraphic series. The micropaleontological analyses indicate that these deposits are referable to Middle-Upper Pleistocene, suggesting a marsh or pond environment subsequent to the filling phases of the sedimentary basin and the following emersion. X-ray diffractometric analyses indicate a mineralogical composition similar to that of the Subapennine Clays, with a predominance of montmorillonite among clay minerals. The higher amount of montmorillonite results in significantly lower shear strength and higher compressibility values, entailing a different general behaviour with respect to natural or human-induced stresses. In order to highlight the relevance of their presence, numerical stability analyses were performed on a slope characterised by the presence of these deposits, also taking into account the seismicity of the area. The results seem to justify the surface creep phenomena and the small shallow landslides that characterise the area
Neobisium (Neobisium) courtiali, a new pseudoscorpion species from France (Arachnida: Pseudoscorpiones, Neobisiidae)
Get PDFNeobisium (Neobisium) courtiali n. sp. is described from France (Department of Puy-de-Dôme) and compared with Neobisium (Neobisium) pauperculum Beier, 1959 from Spain (Cantabria and Asturias), with which it shares its small size and from which it differs above all in having partially granular pedipalpal femur and hand and slenderer pedipalps
A new species of Ischnostomiella Krikken, 1978 from the Limpopo Province of South Africa (Scarabaeidae: Cetoniinae, Xiphoscelidini)
Get PDFA female putative specimen of “Ischnostoma luridipennis Burmeister, 1842” from northern South Africa (Limpopo) was recently studied by the authors among material traced and housed temporarily in the Windhoek Museum (Namibia), as part of an old and unrecorded loan from the Zoology Museum of the Lund University (Sweden). A close analysis of this specimen has revealed that it actually represents a new species of Ischnostomiella Krikken, 1978, here described as I. rudebecki sp. nov. The new species differs from the two other species currently known in this genus, I. denticeps Krikken, 1978 and I. werneri Beinhundner, 2005, mainly by its remarkable testaceous-orange colour, its clypeal U-shape, the poorly developed elytral costae and the complete absence of any brown cretaceous maculation. The species appears to be myrmecophilous, the holotype having been retrieved from a pugnacious ant [Anoplolepis custodiens (Smith, 1858)] nest, and the known distribution thus far is the lowveld of the Limpopo Province in north-eastern South Africa
The first record of the rare hangingfly Bittacus hageni in Bosnia and Herzegovina (Mecoptera: Bittacidae)
Get PDFThe first record of Bittacus hageni Brauer, 1860 for Bosnia and Herzegovina is reported. This is the second record of the species for the Balkan Peninsula and extends the known range of this rare bittacid in Europe considerably
New records of four Odonata species of Community interest in central and southern Italy, with conservation notes
Get PDFThis paper provides new data on the following four species of dragonflies and damselflies (Odonata Coenagrionidae, Gomphidae, Synthemistidae, Cordulegastridae), which contribute to updating their known distribution in central-southern Italy: Coenagrion castellani Roberts 1948, Lindenia tetraphylla (Vander Linden 1825), Oxygastra curtisii (Dale, 1834) and Cordulegaster trinacriae Waterston, 1976. These species are all included in Annexes II and IV of the Habitat Directive 92/43/EC. New sites of C. castellani and C. trinacriae were discovered in the Latium, Campania, Abruzzo and Molise regions, while the presence of O. curtisii was observed in Molise and southern Latium, after a 70-year absence of records. Lindenia tetraphylla was observed at two new sites in southern Apulia. The presence of populations morphologically attributable to C. trinacriae was confirmed in southern Latium, reaching at least the Liri river (FR). Some bibliographic sites of C. castellani, C. trinacriae and L. tetraphylla were also confi rmed. All the sites were listed and mapped, accompanied by brief data on habitat types and on their inclusion within Natura 2000 network sites. Information on persistent threats to these sites is provided, along with conservation notes
Bespoke Tranche Opportunities: the new era of securitization
No full textThis paper reviews the structure of Collateralized Debt Obligations (CDOs), finan cial products used in the period of the 2008 sub-prime mortgage crisis, in order to understand the reasons that lead them to be considered the main responsible for it. The legacy of CDOs, which is reflected in Bespoke Tranche Opportunities (BTOs), is then discussed in order to understand whether they are equally ”toxic” products, as CDOs were defined after the outbreak of the crisis, or they are really innovative tool of securitization
The ecosystem services analytical framework in Italy. A human geography prospect
Get PDFThis paper examines the ecosystem services (ES) analytical framework from a Human Geography perspective. It firstly aims to describe the development of the ES paradigm within international and Italian scientific debates. Although ES appeared in the international scientific debate in the early 1990s, they gained attention by Italian scholars later around 2011. During this period, the paradigm was harshly criticised and several controversial aspects emerged. Payments for ecosystem services (PES) schemes are one of the most frequently discussed topics. However, the limits highlighted by international literature have been rarely mentioned in the Italian debate. Furthermore, PES schemes were introduced through Law No. 221/2015. This output is the result of a social and cultural process that has shaped a strong utilitarian attitude toward ecosystems. For these reasons the paper focuses on the features of Law No. 221/2015 and on the other existing regulatory instruments, which can counterbalance its criticalities. In conclusion, the paper stresses the elements which should be considered in order to implement an effective ecosystems restoration
Settlement in the reclaimed Pontine Marshes during fascism in Italy: evidence form an unexplored archive
Get PDFAn unexplored dataset has been utilized to analyse the colonists who settled in southern Lazio during the Integral Land Reclamation carried out by the fascist regime in the 1930s. The farm records, known as Schede Poderali, encompass the contracts through which selected families were allocated portions of land reclaimed from the marshes. The documents enabled us to delineate the population trends in the decades following marsh reclamation and immigration from other Italian regions. This new piece of information enriches scientific research on the area providing an empirical validation of the interplay between population dynamics and political action