Análise do Balanço de Energia em Área de Floresta e áreas Agrícolas, para a região de Humaitá-AM

Abstract

The southern mesoregion of the state of Amazonas has been undergoing changes from forest areas to managed areas, agricultural land and pastures. However, the consequences of these changes are still little known and, consequently, what impacts they have on the regional climate. One of the ways to assess impacts is through the analysis of the Surface Energy Balance (SEB). However, to estimate BES in the region, it is necessary to use techniques such as Remote Sensing (RS) used in models such as SEBAL. Thus, this work aimed to analyze, through SEBAL, the variation in BES in farm area (FSR), natural field (CAM) and forest (FL), for the Humaitá-AM region. The satellite data was collected in the years 2000, 2005, 2015 and 2020 and processed in geeSebal. Statistical analysis was performed using the Kruskal-Wallis test and Dunn's test. The results showed that soil heat flux (G) and sensible heat flux (H) are lower in FL and higher in CAM and FSR. The latent heat flux (LE) and the Radiation balance (RN) assumed the highest values in FL and lowest in CAM and FSR. The post-hoc Dunn test showed a similarity between the CAM and FSR areas. With the analyses, the SEBAL model satisfactorily estimated the BES components, in addition to showing the increase in H and decrease in LE over the years for the study areas.