This paper focuses on the susceptibility evaluation to bank gullies on earthen embankments through the application of SIMWE (SIMulated Water Erosion) model, using a high resolution digital elevation model (1 meter spatial resolution). The results provided by the model are compared with the hydrologic characteristics, soil texture and soil structure of the agricultural terraces. This approach demonstrates an association between the spatial distribution of erosive forms with high values of water depth and reduced water discharge that are consistent with the lower values of electrical resistivity. The areas with the highest percentage of erosive forms, related to sediment flux, transport capacity and sediment concentration susceptibility, assume medium values. These figures, combined with a low hydraulic conductivity and soil infiltration capacity, are consistent with the fine texture of soils, allowing increased runoff and the development of linear erosion.
Floods and landslides are the natural hazards that most affect Northern Portugal. This paper presents the DISASTER database results for Northern Portugal, containing occurrences of floods and landslides between 1865 and 2010. The research carried out was based on press articles published in national and regional newspapers, but focusing exclusively the occurrences that caused personal damage, including deaths, injured, missing, evacuees and displaced people, regardless of the number of people affected and the economic value of damages. A total of 613 occurrences were recorded, which 18% are landslides and 82% are floods. These occurrences were responsible for 198 deaths, 58 injured, 34 disappeared, 1804 evacuated and 15,918 displaced. The trend analysis shows an increase of 0.17 occurrences/decade. The obtained results show the occurrences concentration in the more urbanized areas and along larger rivers.
Resumo: Integrado no Projeto Sociedade, Escola e Investigação, uma iniciativa da Câmara Municipal do Porto que promove a articulação entre estudantes e docentes/investigadores de estabelecimentos do ensino básico/secundário e superior (faculdades e centros de investigação), apresenta-se o trabalho desenvolvido pela parceria estabelecida entre a Escola Secundária Alexandre Herculano e a Faculdade de Letras da Universidade do Porto. Este trabalho, designado GEOMOVE -Reconstrução de Fluxos Migratórios, tem como objectivo principal perceber os contextos espaciais implicados na 'história de vida' dos estudantes e dos seus familiares, visando sensibilizar os intervenientes para um fenómeno atual -as migrações -através de um desenho conceptual e metodológico que se enquadra nos princípios da Educação para a Cidadania. Através da aplicação de um inquérito online, cujos resultados foram analisados estatisticamente e cartografados, de acordo com diferentes etapas que envolveram todos os intervenientes, demonstra-se como através de um trabalho projeto que envolve o espaço de vivência dos estudantes estes são sensibilizados para um problema real, envolvendo-os num estudo que, contribuindo para a sua 'cultura científica', pode ser a base do desenvolvimento de uma postura mais ativa perante os problemas da sociedade.Palavras-Chave: Projeto SEI, migrações, trabalho projeto, educação para a cidadania 113
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