Browsing by Author "Menezes, Felipe Tiago E Silva"
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- Remote sensing techniques in the analysis of change detection in the Algarve coast, PortugalPublication . Menezes, Felipe Tiago E Silva; Martins, Fernando; Fernandez, HelenaThe process of occupation in the Algarve area is millenary. The last decades have shown that economic activities in the region have caused significant changes in the use and occupation of the land. The main objective of this study was to correlate carbon sequestration and the evolution of land use and occupation, in the coastal zone of Algarve, Portugal, through the application of vegetation indices such as NDVI, PRI, CO2flux, compared with MODIS GPP and COPERNICUS Corine Land Cover, between the years 1990 and 2020. The results were expressed through digital cartography for better data visualization. The NDVI results demonstrate that the vigor and biomass produced by the coastal vegetation tended to increase. There was a decrease in areas without vegetation and areas with sparse vegetation, which were replaced mainly by the vegetation of moderate density and, secondly, by the vegetation of high density. The joint analysis of the indexes corroborates such results, PRI and CO2flux, which, related in a linear regression with the MODIS GPP, indicated that the study region has a great capacity to store carbon, mainly on the West Coast, where the highest density was observed of biomass and a consequent higher level of GPP. The results also indicated an abandonment of rural areas, which were taken over by vegetation and urban sprawl, as well as a growth of around 69% in areas destined for leisure areas, such as golf courses. The results also showed that the environmental preservation areas in the region, the RAMSAR and REDE NATURA 2000 Sites, did not suffer from changes in the use and occupation of their areas.