1,721,068 research outputs found
The Role of Knowledge in the prevention of natural hazards and related risks.
No full textHuman activities, especially over the last two centuries, have had a huge impact on the environment and the landscape. Mankind is able to control and induce landscape changes but is subject to natural processes and hazards due to severe and extreme events (particularly earthquakes but also landslides and flooding) and related risks. Risks are the result of hazards, exposed elements and vulnerability and they are consequently not only an expression of the natural environment, but also related to human interaction with nature. Risks need to be addressed regularly by means of a high level of knowledge in order to provide most uptodate information for any decision which needs to be taken by any party involved.
A high level of knowledge concerning natural hazards and related risks stems from the geological and geomorphological history and from the historical records of the natural processes and grows with multiscale,
multitemporal and multidisciplinary studies and investigations, which include land management, economic and social issues.
A strong effort has to be made in this way to improve risk assessment and the enforcement of existing laws and if necessary new laws, really stem from recent disasters. This will help to achieve improved and effective land management, based on an interdisciplinary approach in which expert geologists and land managers will play a role, because of the importance of natural processes in inducing risks
The role of drainage systems and intermontane basins in the Quaternary landscape of the Central Apennines chain (Italy)
No full textThe Central Apennines chain (Central Italy) is an asymmetric NW–SE thrust belt, NE verging, that has developed since the Neogene. The present landscape is made up of alternating calcareous ridges, valleys on pelitic arenaceous bedrock, as well as wide intermontane basins filled by Quaternary continental deposits. The chain is characterised at high elevation by glacial and isolated patches of dissected karst relict landscapes elevations, and by slope landforms, alluvial fans and fluvial landforms within valleys and intermontane basins; in the latter ancient lacustrine deposits are preserved. Intermontane basins, valley and drainage systems, and relict landscapes are affected by active geodynamic processes resulting in regional uplift, extensional faulting and local subsidence, and by Quaternary climate fluctuations. In this work, the main intermontane basins have been correlated along a SW–NE transect, comparing sedimentary sequences and morphotectonic features, the evidence of local tectonics and uplift pulses, and the main features of the drainage systems, in order to outline the drainage changes occurred during the Quaternary in the Central Apennines chain. Along a SW–NE swath profile, min, mean and max topography elevations, the basins’ min elevation, the elevation of the main karst landforms, and the Pleistocene uplift have been compared. These correlations and comparisons allowed us to provide a further contribution to the understanding of the Quaternary evolution of the drainage systems and the landscape of the Central Apennines chain
Survey of the continental deposits in the CARG Project of central Italy: Methods and implications in field application [Il rilevamento dei depositi continentali nel Progetto CARG dell'Italia centrale: modalità e implicazioni in ambito applicativo]
No full textThe works carried out in the last +15 years within the CARG project are summarized, concerning the mapping of Quaternary continental deposits. Particularly, taking into account the field mapping guidelines of the project, the geological maps have been a reference base for the development of several research and applied projects, carried out in collaboration with Governmental institutions, Municipalities, Associations, private Companies. In this way the CARG Project maps are a starting point for analyses and elaborations concerning geological and natural hazards and risks
La didattica e la divulgazione delle geoscienze nelle attività dell’Università degli Studi G. d’Annunzio di Chieti Pescara.
No full textTwo tectonic geomorphology studies on landscape and drainage network of chain and piedmont areas of the Abruzzi region (Central Apennines, Italy).
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Intermontane Basins in Central Italy: Implication for the Geomorfological Evolution of Central Apennines
No full textLandslides seismically induced caused by the earthquake of 6 April 2009 in Abruzzo Region (Central Italy).
No full textOn April 6th 2009 at 3:32 a.m. a strong earthquake (MI Richter 5.8) hit the L’Aquila area (Abruzzi Region, Central Italy). The event was characterized by an extensional movement along NW-SE fault planes with SW-NE extension. The earthquake involved an
area more than 30 km long, between L’Aquila and the Aterno River valley. The localities of L’Aquila, Paganica, Tempera, Onna, and other villages were heavily damaged or completely destroyed, and about 300 people died. The earthquake also induced several geomorphological effects such as the reactivation of different type of landslides and the formation of new ones. This work analyzes the geomorphological effects, and particularly the rock falls, which occurred during and immediately after the earthquake and the related morphostructural setting
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