Search results for "mORF"
showing 10 items of 899 documents
Geohazard assessment of the north-eastern Sicily continental margin (SW Mediterranean): coastal erosion, sea-level rise and retrogressive canyon head…
2022
Coastal dynamics are the result of several processes controlling the balance between sediment input and output over time. The beach system is not always able to maintain a neutral coastal balance due to natural and anthropogenic causes. We present an integrated marine geology, geomorphological and sea-level rise analysis in the coastal sector between Torre delle Ciavole and Capo Calavà (North-Eastern Sicily, Italy).This sector is characterized by high uplift rates and frequent seismicity (mainly generated by the very active Vulcano-Tindari Fault System), promoting the development of mass-wasting processes in the coastal and offshore sectors. A main erosive feature observed in the area is th…
Geositi e tutela del paesaggio
2018
Secondo la ormai classica definizione di W.A.P. Wimbledon un geosito è "una qualsiasi località, area o territorio in cui è possibile definire un interesse geologico-geomorfologico per la conservazione". L'istituzione di un geosito viene a rappresentare un ulteriore strumento normativo da utilizzare pe la salvaguardia e la tutela del paesaggio, particolarmente efficace in regioni, come quella siciliana, caratterizzate da una notevole geodiversità.
Relazioni tra grotte nei gessi e forme del rilievo di superficie: un modello morfoevolutivo di un'area carsica della Sicilia centro-meridionale
2008
Is the Anthropocene really worthy of a formal geologic definition?
2014
Scientists are actively debating whether the Anthropocene, the geologic time span (GTS) we are now living in, should be considered a period, epoch, or age in the geologic timescale. The solution is not easy, because the beginning of this GTS is undefined and the end unknown. In fact, there is no agreement on when the Anthropocene began, the proposed dates ranging from the Second World War, when radioactive fallout branded soils and sediments all over the world, to little after the end of the last glacial period, i.e. 11.7 thousand years ago, therefore coinciding with the onset of the Holocene. We are in favour of a concurrence of the Anthropocene with the Holocene, although a major impact …
Soil Erosion and Deposition Rate Inside an Artificial Reservoir in Central Italy: Bathymetry versus RUSLE and Morphometry
2022
This study, using different direct and indirect methodologies, evaluated the sedimentation rate in an artificial reservoir in central Italy. This reservoir is regionally representative and was built in the 1960s for hydroelectric purposes; it has experienced a strong decrease in trap efficiency and a loss of over 70% of the stored water volume. Direct measurements of the lake bottom bathymetry, carried out in 2006 and 2015, and 3D reconstructions performed in a GIS environment, made it possible to calculate the volume of filling material and to verify an increasing trend in the sedimentation rate since 2006. The sample reservoir denudation rate was compared with that obtained using the Revi…
Aproximación a la lengua de los tratados hipocráticos De fistulis y De haemorrhoidibus
2003
A partir de una aproximación previa en un trabajo anterior a propósito de aspectos fonéticos y morfológicos en dos tratados quirúrgicos del Corpus Hippocraticum, De fistulis y De haemorrhoidibus, en el presente artículo se quiere continuar esta labor en el terreno de la sintaxis y el vocabulario, con vistas a poner de relieve algunos rasgos de griego helenístico que, claramente, aparecen en estos tratados. Todo ello refuerza la opinión de que estos tratados son obras de pleno siglo IV a. C., De haemorrhoidibus probablemente de mediados de siglo y De fistulis quizá algo anterior. From a previous approach about phonetic and morphological features in the Hippocratic treatrises De fistulis and …
La Grotta dei Personaggi di Montevago (AG), una nuova segnalazione di cavità ipogenica in Sicilia
2015
La Grotta dei Personaggi è localizzata in Sicilia occidentale, nei pressi di Monte Magaggiaro, a S del centro abitato di Montevago (AG). Nell’area sono presenti sorgenti termali, caratterizzate da acque cloro-solfate alcalino-terrose con temperatura di circa 40 °C e pH 7. La Grotta dei Personaggi, conosciuta già dai primi anni del 1900 e nota anche per ritrovamenti archeologici, non era mai stata dettagliatamente rilevata e studiata. La cavità si sviluppa prevalentemente in calcari di piattaforma della formazione Inici (Giurassico inf.) e in calcari di scarpata e pelagici della formazione Buccheri (Giurassico inf.-sup.). Si tratta di una cavità sub-orizzontale che presenta uno sviluppo di c…
CART-based gully types classification: a case study in Sicily (Italy)
2015
Gulling is a complex process depending on several factors and involving a wide range of sub-processes. Different types of gullies were distinguished and described in literature. Their contribution to soil erosion changes in relation with the typology and their presence is influenced by different controlling factors. Mapping and classifying gullies is crucial for monitoring soil erosion. So far, no systematic definition of morphological characteristics of the different types of gullies and of their controlling factors has been made. The present work aims to suggest an innovative approach to automatically classify gullies by integrating remote sensing, GIS and a classification algorithm. The …