The mass wasting on hillslopes is a natural phenomenon, but it can be affected by human activities. In Brazil, one of the areas affected by these problems is the city of Florianópolis - SC. To solve or reduce these problems, local susceptibility studies are an essential issue. The objective of this research work is to analyse the landslide susceptibility in Saco Grande area, a borough of Florianópolis. For that, we tried to associate several physical and social aspects envolved in the deflagration of that phenomenon. A great number of preliminary thematic maps were made, by using aerial photographies, satellite images and field data. With the support of a geographical information system, some of these maps were overlaid, resulting in the elaboration of the Landslide Susceptibility Map.With all those information avaiable, we were able to make a susceptibility analysis of the study area. We find out that the occurance of landslides are strongly related to inappropriate occupation, which is responsable for a great number of rock falls, the most common type of mass wasting in Saco Grande area. We also realized that the middle portions of hillslopes are the most dangerous places and its occupation has to be avoided. Finally, we recomend the implementation of an emergency plan in the Florianópolis city council.

Abstract:The monitoring of land cover and land use changes is justified by the growing need for management and monitoring of global changes, as recommended by UNCED-92 and subsequent conferences in Johannesburg (Rio + 10) and Rio de Janeiro (Rio + 20). Based on an international methodological framework, which identifies changes in terrestrial ecosystems, the main purpose of this work is to monitor changes in land cover and land use for all the brazilian territory, at regular intervals, by the systematic mapping and the use of a territorial grid for statistical purposes. The methodology involves five stages of work: pre-processing; classification; edition; validation; and map algebra. A preliminary analysis allowed the observation of some changes in the study period. There was significant loss of forest cover. However, areas of grasslands, including savannas, scrublands and pioneer formations, suffered proportionately the greatest reduction. Some changes can be highlighted, such as the significant growth in agriculture and pastures in OPEN ACCESSThis paper has been retracted. A Retraction notice was published on 20 January 2016, in Proceedings of the 1st International Electronic Conference on Remote Sensing, 22 June-5 July 2015; Sciforum Electronic Conference Series, Vol. 1, 2016 , d017; doi:10.3390/ecrs-1-d017 2 northern Mato Grosso, the increase of pastures in eastern Pará , east of Acre and Rondônia, and the expansion of planted forests in the south region, especially in Santa Catarina and Paraná .