Made available in DSpace on 2016-12-08T16:55:41Z (GMT). No. of bitstreams: 1 elisa.pdf: 11036235 bytes, checksum: 94721d4ef4f11108675ebd447aa2c20e (MD5) Previous issue date: 2012-07-02 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / This dissertation aims to analyze the mass movements susceptibility in the micro basin of ribeirão Máximo, which is located at the southwest of Luis Alves municipality, in the low Itajaí Valley, northeastern Santa Catarina State, with coordinates 26°43 23.22 and 26°47 17.83 S and 48°53 16.02 and 48°57 27.96 W. The mass movements are phenomena of the earth natural morphodynamics and work in sculpture and evolution of the relief, through the detachment and transport of soil and/or rock material downward slope, by gravity action. However, the great focus on these processes takes place due to the increase of occurrences involving occupied areas with big social and environmental losses. The environmental disaster occurred in 2008 in Santa Catarina State, which affected mainly Itajaí Valley, has joined forces of the scientific community (GTC, FAPESC) in the search for understanding these phenomena that have caused so much damage and losses. In this context, Luis Alves municipality was one of the most affected, motivating the development of this research. Only in the micro basin of ribeirão Máximo were mapped 18 mass movements scars resulting from this period of intense precipitation. The work method proposed is based on the systemic analysis, adopting the watershed as the unit of analysis, with the use of theoretical work, field and lab methods, through the study and integration of local environmental specificities, climatology, geology, geomorphology, pedology, land use, in the quest for the conditioners involved in the mass movements occurrences in the micro basin of ribeirão Máximo. The environmental characteristics of the micro basin of ribeirão Máximo, humid subtropical climate with high precipitation indexes, high grade metamorphic lithologies of the Granulitic Complex of Santa Catarina State with structural lineaments and marked discontinuity plans, rugged and sloping relief with steep hillsides and deep valleys, and thick soils, added to inadequate antropic actions in hillsides, as cuts for construction of houses and roads, predispose the development of erosion and destabilizing processes. The results point the structural lineaments, the geomorphologic features, the slope and the land use as the main conditioners involved in the mass movements occurrences in the micro basin of ribeirão Máximo. The integration of these conditioners in SIG environment enabled the generation of the mass movements susceptibility map of the micro basin of ribeirão Máximo, with the hierarchization of the area in five susceptibility classes: very low, low, medium, high and very high. The detailed study of one of the 18 mass movements scars mapped in the micro basin of ribeirão Máximo allowed a wider understanding of the actuation of the conditioners involved in the occurrences of mass movements, mainly the soil behavior, confirming the low resistance of C horizon and indicating that the ruptures occur mainly in this horizon

Made available in DSpace on 2016-12-08T16:55:48Z (GMT). No. of bitstreams: 1 Sinara.pdf: 7213170 bytes, checksum: 532417886f356ca3ecc311dcfdce19a1 (MD5) Previous issue date: 2011-08-04 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / Many cities and rural communities are settled in areas with natural dynamics that represent danger to people, such as floods, landslides, high winds, earthquakes, among others. These dangerous phenomena with high magnitude and / or frequency can lead to accidents and even disasters with many losses and damages, including loss of life. The development of many regions and countries could be affected by the occurrence of such disasters, as economic resources are lost when the event occurs, and also spent on reconstruction, which leads to a vicious circle, since the economic resource is spent on emergencies and reconstruction and not on prevention. The best way to minimize the negative impacts of natural disasters is to create methods of prevention. Mapping is an essential tool for planning, management and monitoring areas considered at risk. For case study, it was chosen the sub-basin of the river Ribeirão Sorocaba located in Luis Alves, Santa Catarina, a region that was highly affected by the rains in November 2008. The methodological approach of the research was to automatically extract the Digital Elevation Model (DEM) through IKONOS stereo pair image ans its metadata files. With DEM it was possible to orthorectify the image and evaluate the cartographic quality of both generated products accordingly to the Cartographic Exactness Standard (PEC, in Portuguese). Evaluation showed that the objective of obtaining a scale better than 1:50.000 was achieved. The products can obtain the scale of 1:10.000 in planimetry and 1:25.000 in altimetry, both in class A of PEC / Muitas cidades e comunidades rurais estão assentadas em sítios naturais sujeitos a fenômenos da dinâmica natural que representam risco para a população, como: inundações, deslizamentos, ventos fortes, terremotos, entre outros. A deflagração desses fenômenos perigosos com alta magnitude e/ou frequência pode provocar desde acidentes até catástrofes com muitas perdas e danos, inclusive com perdas de vidas humanas. O desenvolvimento de muitas regiões e países pode ser prejudicado pela ocorrência dessas catástrofes, pois recursos econômicos são perdidos no momento da ocorrência do evento e também gastos na reconstrução, o que leva a um círculo vicioso, uma vez que o recurso econômico é gasto em emergências e reconstrução e não em prevenção. A melhor forma de minimizar os impactos causados pelos desastres naturais é criar métodos de prevenção. Nesse sentido, essa pesquisa divulga a cartografia como instrumento fundamental para o planejamento, gestão e monitoramento das áreas consideradas de risco. Para estudo de caso foi escolhida a sub-bacia do Ribeirão Sorocaba localizada no município de Luís Alves, em Santa Catarina, região esta que foi muito afetada pelas chuvas de novembro de 2008. A metodologia da pesquisa se resume na extração automática do Modelo Digital de Elevação (MDE) por meio do par estereoscópico da imagem IKONOS e dos seus arquivos de Metadados. Com o MDE foi possível ortorretificar a imagem e avaliar a qualidade cartográfica dos dois produtos gerados segundo o Padrão de Exatidão Cartográfica (PEC). A avaliação mostrou que o objetivo de alcançar uma escala melhor que 1:50.000 foi alcançado. Os produtos podem chegar a escala de 1:10.000 na planimetria e 1:25.000 na altimetria, ambos na classe A do PEC