Eventos pluviais extremos e risco de inundações na cidade de Aracaju/SE

Abstract

The disorderly growth of cities has caused a continuous process of environmental degradation in urban centers, providing a setting for risks caused by climatic factors. It is in this context that, from the 70s, the city of Aracaju has grown considerably. The process of occupation of environmentally fragile areas, for socially vulnerable populations is critical to the formation of areas of risk, exposed to more intense rainfall events. This research aims to analyze the extreme rainfall events in the areas of risk to flooding from the urban development of the city of Aracaju / SE. To achieve the proposed objectives was made using different procedures, emphasizing the theoretical review, covering theory and urban climate, cartographic survey and field work to show and record the areas at risk of flooding. The methodology allowed the crossing of social and environmental variables to identify the level of risk to flooding. The results achieved in this research led to the acceptance of the rain is the main cause of the risk of formation to flooding in Aracaju / SE, but that comes from overlapping with the pace of urbanization in the city. In addition, the study also demonstrated that an adequate sanitation service, if the urban drainage service contributes directly to improving the health of the population. The risk to flooding can be analyzed and verified in comparison of existing typological patterns in Aracaju in 2004, compared to the current typological standards in 2014. The city is another and their relationships as well. Thus, the extreme rainfall events that occur in the city of Aracaju occur in the autumn and winter period, between the months of March to July, and cause the exposure condition of the risk to the resident, varies according to their socioeconomic standard population