1,721,040 research outputs found
Micromorphological evidences of paleoenvironmental changes in Northerns Cilento during the Late Quaternary.
No full textWeathering processes and rates of scarp retreat in a Mediterranean mountain environment: A multi-analytical approach from terrestrial laser scanning to microscale surveys
Full text linkEstimating the rates of Earth surface processes may provide a deeper comprehension of landscape shaping at different spatial/temporal scales in the light of ongoing or future climate changes and geomorphological hazards. This study explores the use of terrestrial laser scanner combined with macro/micromorphological and compositional analyses to assess three-year surface and volume changes on three granodiorite scarps in a Mediterranean upland environment (Sila Massif, Italy), estimate erosion/accumulation rates and relate them to specific geomorphic processes, weathering patterns and grades. The three scarps, affected by intermediate to high weathering grade classes, respond differently according to aspect and grain size. On coarser-grained granite of the W-facing, scarp 1 rounded weathering patterns developed because of the moister, less insolated conditions. On the finer-grained rocks of the SE-facing scarp 2, with prolonged insolation and temporary moisture, angular patterns prevail. Fine vs. coarse weathered material detached from the scarps is facilitated by prevalent chemical or physical rock degradation processes. On scarp 3, the coexistence of zones affected by pronounced physical breakdown and others influenced by pervasive chemical weathering is due to intermediate microclimatic conditions brought about by varying E and NE-facing aspect of the scarp. Rock jointing likely controls rockfall processes. The average retreat/advance rates of the scarps range from n x 10-6 to 10-2 m yr- 1, with net erosion rates in the range 1 x 10- 2-3 x 10-4 m yr- 1 and are consistent with literature data. 3D models also allow the assessment of pre-failure landslide processes affecting the scarps and their relationships with weathering
The dramatic cluster of pyroclastic debris flows which occurred on 5th and 6th May 1998 in the Sarno Mountains (Vesuvius Regio, Souther Italy): a geomorphological perspective. In: Landslides in research, theory and practice. Bromehead E, Dixon N. & Ibsen M-L Editors; Thomas Telford, London.
No full textLate Quaternary climatic changes in Northerns Cilento (Southern Italy): an integrated geomorphological and paleopedological study
No full textAlcune tipologie di versante ricorrenti in Appennino meridionale: forme, depositi e processi morfodinamici. .
No full textGeomorphology and GIS analysis for mapping gully erosion susceptibility in the Turbolo catchmen (Northern Calabria, Italy)
No full textThis work summarizes the results of a geomorphological and bivariate statistical
approach to gully erosion susceptibility mapping in the Turbolo stream catchment
(northern Calabria, Italy). An inventory map of gully erosion landforms of the area has
been obtained by detailed field survey and air photograph interpretation. Lithology, land
use, slope, aspect, plan curvature, stream power index, topographical wetness index and
length-slope factor were assumed as gully erosion predisposing factors. In order to estimate
and validate gully erosion susceptibility, the mapped gully areas were divided in two
groups using a random partitions strategy. One group (training set) was used to prepare the
susceptibility map, using a bivariate statistical analysis (Information Value method) in GIS
environment, while the second group (validation set) to validate the susceptibility map,
using the success and prediction rate curves. The validation results showed satisfactory
agreement between the susceptibility map and the existing data on gully areas locations;
therefore, over 88% of the gullies of the validation set are correctly classified falling in
high and very high susceptibility areas. The susceptibility map, produced using a methodology
that is easy to apply and to update, represents a useful tool for sustainable
planning, conservation and protection of land from gully processes. Therefore, this
methodology can be used to assess gully erosion susceptibility in other areas of Calabria, as
well as in other regions, especially in the Mediterranean area, that have similar morphoclimatic
features and sensitivity to concentrated erosion
Carta geologica e Geomorfologica dell’alta valle del F. Volturno: note illustrative
No full textdue tavole fuori testo: carta geologica e carta geomorfologic
Alcune tipologie di versante ricorrenti in Appennino meridionale: forme, depositi e processi morfodinamici. .
No full textCarta geologica e Geomorfologica dell’alta valle del F. Volturno: note illustrative
No full textdue tavole fuori testo: carta geologica e carta geomorfologic
The dramatic cluster of pyroclastic debris flows which occurred on 5th and 6th May 1998 in the Sarno Mountains (Vesuvius Regio, Souther Italy): a geomorphological perspective. In: Landslides in research, theory and practice. Bromehead E, Dixon N. & Ibsen M-L Editors; Thomas Telford, London.
No full text- …
