Morphodynamic analysis and identification of technogenic landform classes in an urban area in the municipality of Goiana-PE

Abstract

The economic and population growth of the municipality of Goiana-PE has been influencing the growing occupation of new spaces that have become fragile due to anthropic actions. The procedural dynamics of the landscape, resulting from induced changes, leads to the triggering of geomorphological risks and, consequently, disasters. In this context, the present study aims to establish an analysis of contemporary geomorphological and occupational aspects, as well as to evaluate the repercussions from different forms of use on the surface process dynamics from anthropogenic interferences on the morphodynamics. To this purpose, the following methodology was taken: bibliographic survey; data geoprocessing; production and analysis of physical mappings of the municipality; and identification of technogenic relief classes. The central object of investigation is the section of the Goiana river channel in the urban area. Given the analysis, it was possible to verify that Goiana presents physical-environmental aspects characteristic of the eastern region of northeastern Brazil, whose urban configuration overlaps the natural elements outlining scenarios prone to natural risks of several orders. For example, it was observed a predominance of urban occupation in areas whose soil is naturally humid and saturated, near water bodies, on flat and impermeable land and over terraces or river plains. In addition, technogenic terrains of sedimentation and degradation associated with different types of land use were verified, as well as second-order technogenic deposits originating from the remobilization of technogenic-alluvial sediments. Thus, the contributions resulting from this study can be taken as a resource for environmental planning and management by public authorities.