Classificação por unidade de paisagem e estudo da variação da biomassa da vegetação em um complexo de serras no interior da Paraíba utilizando sensoriamento remoto

• Ano de defesa: 2018
• Autor(a) principal: Araújo, Elânia Daniele Silva
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal da Paraíba; Brasil; Geografia; Programa de Pós-Graduação em Geografia; UFPB
• Palavras-chave em Português: Semiárido; Índices de vegetação; Índice topográfico de umidade; Áreas de exceção; Semiarid; Vegetation index; Topographic moisture index; Areas of exception; CNPQ::CIENCIAS EXATAS E DA TERRA::GEOCIENCIAS
• Link de acesso: https://repositorio.ufpb.br/jspui/handle/123456789/13155

The understanding of the dynamics of semi-arid environments has become increasingly necessary, especially when it comes to the interaction complexity of their natural elements, due to the fact that it is an environment with particularities. The Brazilian semiarid has a great diversity of landscapes, and the interaction of its natural elements will provide the formation of areas of exception, mainly due to its orographic arrangement, providing in that environment a different regime of rainfall, soil and vegetation. Located in Sertão Paraibano is the Saws complex, object of study of this research, has a differential regime regarding its geoenvironmental aspects. In order to understand their particularities, it was aimed to perform a classification by unit of landscape, identifying the relationship between topography and humidity in the maintenance of the vegetation of the Saws and to verify if these fit the profile of subhumid enclaves. In order to reach the objectives, a base mapping, field visits, meteorological data collection, application of land and vegetation indexes, and the classification of a landscape unit were carried out, and it was identified whether the mountain range complex can be classified as a submerged enclave. For the vegetation analysis, a comparison was made between the vegetation indexes (IVDN and IVAS), from this, it was possible to verify that both are satisfactory for the quantification and representation of the local vegetation, although, they are not totally satisfactory for the classification of the vegetation types, since correlation with the field data is necessary. Regarding the relationship between vegetation index and topographic moisture index, a positive correlation was not obtained due to factors such as the influence of the catchment area and slope. In general, it was possible to identify that there is a differentiated condition both in relation to vegetation and the pluviometric regime, mainly in the top areas of the hills, although there was no direct correlation with the topographic index of humidity, the results allow the perception that by In the middle of the humidity, there is the existence of a differentiation in the landscape, giving room for the categorization and/or classification of the same in four units: Pediment, Convex tops, Top and Escarp. After the integrated analysis of the physiographic elements of the mountain range complex, it was possible to identify that due to its orographic arrangement there is a differentiated development of the rainfall, soil and vegetation regime, in which areas of dense arboreal caatinga were identified. This interaction, together with its medium altitude relief and flattened surfaces, makes the Saws complex a distinct place within the dry semi-arid region, to which it may be possible to classify it as a sub-humid enclave.