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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Determinação da biomassa vegetal e parâmetros ambientais associados na chapada do Araripe por imagem de satélite.

SILVA, João Alvino Sampaio da 17 July 2018 (has links)
Submitted by Maria Medeiros (maria.dilva1@ufcg.edu.br) on 2018-07-17T11:51:55Z No. of bitstreams: 1 JOÃO ALVINO SAMPAIO DA SILVA - DISSERTAÇÃO (PPGMET) 2013.pdf: 8549821 bytes, checksum: 8d11d13bc0cf49c7310914618d846291 (MD5) / Made available in DSpace on 2018-07-17T11:51:55Z (GMT). No. of bitstreams: 1 JOÃO ALVINO SAMPAIO DA SILVA - DISSERTAÇÃO (PPGMET) 2013.pdf: 8549821 bytes, checksum: 8d11d13bc0cf49c7310914618d846291 (MD5) Previous issue date: 2013-10-31 / O objetivo deste trabalho foi determinar e avaliar o comportamento anual do acúmulo de biomassa vegetal na Chapada do Araripe, a partir de dados do satélite Landsat 5-TM, com a combinação dos algoritmos SEBAL e CASA. Para a realização deste estudo foram obtidas 6 imagens, na órbita 217/ponto 65, nas datas de 30/07/2006, 18/08/2007, 21/09/2008, 24/09/2009, 13/10/2010, 29/08/2011 a que correspondem aos DJ de 211, 230, 264, 267, 286, 241, respectivamente. Avaliando a biomassa vegetal acumulada (Bio_Acum), obteve-se valores médios para a área de estudo iguais a 453,07 kg m-2, 486,50 kg m-2, 457,23 kg m-2, 571,82 kg m-2, 178,16 kg m-2 e 279,09 kg m-2, respectivamente para as referidas datas. Os elevados valores para a Bio_Acum na Chapada do Araripe, se deve ao fato de que a área com cobertura de árvores é responsável por aproximadamente 70% da biomassa estimada, onde o índice de vegetação por diferença normalizada (NDVI) é superior a 0,65. / The objective of this study was to determine and evaluate the annual performance of the accumulation of plant biomass in the Araripe, data from Landsat-5 TM, with the combination of algorithms SEBAL and CASA. For this study 6 images were obtained, in orbit 217/65 point, on the dates of 30/07/2006, 18/08/2007, 21/09/2008, 24/09/2009, 13/10/2010, 29/08/2011 corresponding to the DJ 211, 230, 264, 267, 286, 241, respectively. Evaluating plant biomass accumulated (Bio_Acum) gave average values for the area equal to 453.07 kg m-2 486.50 kg m-2 study, 457.23 kg m-2 571.82 kg m-2, 178.16 kg m-2 and 279.09 kg m-2, respectively, for these dates. The high values for the Bio_Acum Araripe, is due to the fact that the coverage area of trees is responsible for approximately 70% of the estimated biomass, where the vegetation index (NDVI) is greater than 0.65.

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