title: The influence of land use change on landslide susceptibility zonation: the Briga catchment test site (Messina, Italy).
abstract: The spatial distribution of landslides is influenced by different climatic conditions and environmental settings including topography, morphology, hydrology, lithology, and land use. In this work, we have attempted to evaluate the influence of land use change on landslide susceptibility (LS) for a small study area located in the southern part of the Briga catchment, along the Ionian coast of Sicily (Italy). On October 1, 2009, the area was hit by an intense rainfall event that triggered abundant slope failures and resulted in widespread erosion. After the storm, an inventory map showing the distribution of pre-event and event landslides was prepared for the area. Moreover, two different land use maps were developed: the first was obtained through a semi-automatic classification of digitized aerial photographs acquired in 1954, the second through the combination of supervised classifications of two recent QuickBird images. Exploiting the two land use maps and different land use scenarios, LS zonations were prepared through multivariate statistical analyses. Differences in the susceptibility models were analyzed and quantified to evaluate the effects of land use change on the susceptibility zonation. Susceptibility maps show an increase in the areal percentage and number of slope units classified as unstable related to the increase in bare soils to the detriment of forested areas.
authors.affiliation: Consiglio Nazionale delle Ricerche, Istituto di Ricerca per la Protezione Idrogeologica, Perugia, Italy, Paola.Reichenbach@irpi.cnr.it.
authors.forename: P
authors.initials: P
authors.lastname: Reichenbach
authors.forename: C
authors.initials: C
authors.lastname: Busca
authors.forename: A C
authors.initials: AC
authors.lastname: Mondini
authors.forename: M
authors.initials: M
authors.lastname: Rossi
mesh_terms: D003247:Conservation of Natural Resources; D004784:Environmental Monitoring; D062305:Geographic Mapping; D055593:Geological Phenomena; D007558:Italy; D055876:Landslides; D008962:Models, Theoretical; D018570:Risk Assessment / Q000379:methods; D012987:Soil
chemical_list: D012987:Soil