Geotecnologia aplicada a avaliação e conservação de manguezal do Riacho Caponga Roseira, Cascavel, Ceará

Abstract

The coastal zone shelters several ecosystems, among them the mangrove, which presents great species diversity, and is considered a nursery of marine life, being, therefore, of high ecological relevance. On the other hand, it suffers from the impact of anthropic actions, by occupation or other disfigurement of its areas. In this sense, geotechnologies allow the researcher to understand the spatial and temporal dynamics of the area and observe the process of urban expansion, as well as being used assist in coastal zone management. The objective of this work was to analyze the state of conservation of the mangrove areas of the Caponga Roseira Creek, using geotechnologies, seeking to show the current state of the ecosystem. For this, CBERS 4A and Google Earth Pro satellite images were used, and calculations of the Normalized Difference Vegetation Index (NDVI) were performed together with vector data, area calculations and photographic images. As a result, it was evidenced that the mangrove is at some points fragmented and at others more conserved, accounting for an area of about 3 hectares, with the presence of washed and mangrove forest features. The latter is not fully inserted in the Permanent Preservation Area (APP) determined for the creek, requiring that the APP delimitation be enlarged to include the entire ecosystem. There is also the presence of solid waste on the bank of the stream and in the mangrove itself. With the results obtained, it was possible to infer that geotechnologies can be important allies for understanding the spatial dynamics of the coastal zone and should be incorporated into the management and use planning of these areas.