 |
| Titel |
Using online databases for landslide susceptibility assessment: an example from the Veneto Region (northeastern Italy) |
| VerfasserIn |
M. Floris, M. Iafelice, C. Squarzoni, L. Zorzi, A. de Agostini, R. Genevois |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1561-8633
|
| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 11, no. 7 ; Nr. 11, no. 7 (2011-07-12), S.1915-1925 |
| Datensatznummer |
250009561
|
| Publikation (Nr.) |
 copernicus.org/nhess-11-1915-2011.pdf |
|
|
|
|
|
| Zusammenfassung |
In this paper, spatial data available in the Italian portals was used to
evaluate the landslide susceptibility of the Euganean Hills Regional Park,
located SW of Padua (northeastern Italy). Quality, applicability and
possible analysis scales of the online data were investigated.
After a brief overview on the WebGIS portals around the world, their
contents and tools for natural risk analyses, a susceptibility analysis of
the study area was carried out using a simple probabilistic approach that
compared landslide distribution and influencing factors. The input factors used
in the analysis depended on available data and included landslides,
morphometric data (elevation, slope, curvature, profile and plan Curvature)
and non-morphometric data (land use, distance to roads and distance to
rivers). Great attention was paid to the pre-processing step, in particular
the re-classification of continuous data that was performed following
objective, geologic and geomorphologic criteria.
The results of the study show that the simple probabilistic approach used for
the susceptibility evaluation showed quite good accuracy and precision
(repeatability). However, heuristic, statistical or deterministic methods
could be applied to the online data to improve the prediction.
The data available online for the Italian territory allows susceptibility
assessment at medium and large scales. Morphometric factors, such as
elevation and slope angle, are important because they implicitly include
information that is not available, such as lithologic and structural data.
The main drawback of the Italian online databases is the lack of
information on the frequency of landslides; thus, a complete hazard analysis
is not possible.
Despite the good results achieved to date, collection and sharing of data on
natural risks must be improved in Italy and around the world. The
creation of spatial data infrastructure and more WebGIS portals is
desirable. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|