The literature concerning geomorphological description of DSGSD (Deep-Seated Gravitational Slope Deformations) is focused on their more recurrent morphometric and morphologic characteristics. Identification and mapping of landforms in geomorphology are based on field survey and interpretation of topographic maps and aerial photos. These traditionally techniques are affected by a high degree of uncertainty. Considerable enhancement for morphometric interpretation can be obtained through generation of a synthetic stereo pair, by means of the integration of spectral data with Digital Elevation Model (DEM) using a GIS methodology. This study is based on the collection of a wide case histories published in literature regarding the sackung and deep-seated block slide types, both well dispread in all over the Italian Alps and Apennines. In order to suggest the kind of landforms and the range of morphometric values that distinguish the DSGSD and that can be used in spatial analysis methodology, the paper presents: 1) the occurrence (in percentage) of each landform to select only these that better characterize DSGSD; 2) the definition of each landform not from a semantic point of view but with a geometric method.

A revision about morphologic characteristics of DSGSD (Deep-Seated Gravitational Slope Deformations) to develop a standardize GIS approach

MELELLI, Laura
2005

Abstract

The literature concerning geomorphological description of DSGSD (Deep-Seated Gravitational Slope Deformations) is focused on their more recurrent morphometric and morphologic characteristics. Identification and mapping of landforms in geomorphology are based on field survey and interpretation of topographic maps and aerial photos. These traditionally techniques are affected by a high degree of uncertainty. Considerable enhancement for morphometric interpretation can be obtained through generation of a synthetic stereo pair, by means of the integration of spectral data with Digital Elevation Model (DEM) using a GIS methodology. This study is based on the collection of a wide case histories published in literature regarding the sackung and deep-seated block slide types, both well dispread in all over the Italian Alps and Apennines. In order to suggest the kind of landforms and the range of morphometric values that distinguish the DSGSD and that can be used in spatial analysis methodology, the paper presents: 1) the occurrence (in percentage) of each landform to select only these that better characterize DSGSD; 2) the definition of each landform not from a semantic point of view but with a geometric method.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11391/21061
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