Dinâmica da desertificação em bacia hidrográfica: avaliação dos riscos naturais e níveis de degradação da sub-bacia de São Domingos, Cabo Verde

Abstract

This study analyzed the dynamics of desertification in the São Domingos sub-basin, in Cabo Verde, focusing on the assessment of natural risks and levels of environmental degradation. The research was conducted using a methodology based on general systems theory and geobiophysical indicators of environmental degradation/desertification. The objective was to understand the processes driving the degradation of the environmental systems in the São Domingos sub-basin. Among the results obtained are the delimitation and characterization of the six environmental systems and their levels of degradation, as well as values related to the basin's morphometric aspects, indicating a low propensity for flooding and the degree of instability to which these systems are subjected. Based on this, it is possible to establish that desertification in the region is influenced by a complex interaction between natural and anthropogenic factors, with emphasis on the soil's low water retention capacity, accelerated erosion, and inadequate land use. In light of the above, it is concluded that a thorough understanding of this phenomenon is essential for the development of effective public policies and actions that promote environmental resilience and the sustainability of the São Domingos sub-basin.