Publicação
The climatic risk of drought to the Brazilian semi-arid region
| Resumo: | Droughts and the floods of the rainy period are risk factors of meteorological and climatic phenomena, which characterize semi-arid environments, like north eastern Brazil. This article addresses the climatic risk of drought, associating climatic seasonality, human actions and environmental vulnerability to erosion and silting of the Teixeira Mountain Range springs, with the example of the historic case of Açude (weir) de Poços, in Teixeira Municipality, Paraíba State. This research work is based on assumptions related to semi-arid morphodynamics, observing factors peculiar to the Teixeira Mountain Range, such as irregular precipitation, climatic regime, steep relief, areas with degraded vegetation, soils prone to erosion and the effect of runoff on the slopes. From the analysis it is verified that both the climatic and the human factors are causes of environmental risk for the region, considering the alternation of dry and torrential rains, the expanse of rural areas and the mismanagement of natural resources. |
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| Autores principais: | Ramalho, Maria Francisca de Jesus Lírio |
| Outros Autores: | Guerra, Antonio José Teixeira |
| Assunto: | Seasonal climate natural risk environmental risk Sazonalidade climática risco natural risco ambiental |
| Ano: | 2017 |
| País: | Portugal |
| Tipo de documento: | artigo |
| Instituição associada: | Imprensa da Universidade de Coimbra |
| Idioma: | português |
| Origem: | Territorium |
| Resumo: | Droughts and the floods of the rainy period are risk factors of meteorological and climatic phenomena, which characterize semi-arid environments, like north eastern Brazil. This article addresses the climatic risk of drought, associating climatic seasonality, human actions and environmental vulnerability to erosion and silting of the Teixeira Mountain Range springs, with the example of the historic case of Açude (weir) de Poços, in Teixeira Municipality, Paraíba State. This research work is based on assumptions related to semi-arid morphodynamics, observing factors peculiar to the Teixeira Mountain Range, such as irregular precipitation, climatic regime, steep relief, areas with degraded vegetation, soils prone to erosion and the effect of runoff on the slopes. From the analysis it is verified that both the climatic and the human factors are causes of environmental risk for the region, considering the alternation of dry and torrential rains, the expanse of rural areas and the mismanagement of natural resources. |
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