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You searched for subject:(Imagem IKONOS II). One record found.

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Universidade Federal de Viçosa

1. Antonio Santana Ferraz. Aboveground biomass and carbon stock estimations in a semideciduous forest using IKONOS II images.

Degree: 2012, Universidade Federal de Viçosa

Estimates of carbon and biomass in forested areas can be obtained using allometric equations. High resolution remote sensing imagery has also been widely used to estimate tree carbon biomass, based on digital variables (radiance/ reflectance values and vegetation indices) extracted from images. In natural forests, that are typically heterogeneous and present high floristic, physiognomical and phenological diversity, the use of this technique is more complex since there is little quantitative biomass data collected in the field and a lack of research that integrates data from different sources such as forest inventories and satellite images to obtain estimates. In this study a set of IKONOS II satellite images was used to estimate aerial biomass and carbon stock in a semideciduous seasonal forest fragment located in Viçosa, MG, in an area known as Mata da Silvicultura, belonging to the Universidade Federal de Viçosa. Estimates of above ground biomass and carbon stocks were obtained with allometric equations based on forest inventory data conducted in fifteen 1,000 m2 (20 m × 50 m) parcels. These estimates were related to digital variables (reflectance of four spectral bands and 12 vegetation indices) extracted from IKONOS II satellite images using regression analysis and an artificial neural network. In regression analysis the highest (significant) correlations to carbon stock and biomass were found for the spectral bands 2 and 4 and the GEMI, SAVI, TCap1, TCap2 and TCap3 vegetation indices. However, only variables Band4 and TCap1 were necessary for estimating both total biomass and carbon stock. For biomass estimates, correlation coefficients of r2 = 0.394 for Band4, and r2 = 0.496 for TCap1 were observed. For carbon stock estimates, correlations of r2 = 0.400 with Band4 and r2 = 0.504 for TCap1 were found. Through neural network training it was found that use of the four IKONOS II satellite spectral bands as input variables were sufficient to estimate biomass and carbon stocks for the area studied. Residuals obtained using regression analysis exceeded 60% while residuals in the range of 1.5% were obtained using neural networks.

Estimativas de massa e carbono em povoamentos florestais podem ser obtidas empregando-se equações alométricas. Imagens de alta resolução, provenientes de sensores remotos, também têm sido amplamente utilizadas para estimar massa e carbono de árvores, com base em variáveis digitais (valores de radiância/ reflectância e índices de vegetação) extraídas das ima gens. No caso de florestas naturais, normalmente heterogêneas, com grande diversidade florística, fisionômica e fenológica, a utilização desta técnica reveste-se de maior complexidade, uma vez que há pouca disponibilidade de dados quantitativos de biomassa coletados em nível de campo, havendo, assim, carência de pesquisas que integrem dados de diferentes fontes, como inventários florestais e imagens de satélites, na obtenção daquelas estimativas. Nesta pesquisa, imagens do satélite IKONOS II foram utilizadas para obtenção das…

Advisors/Committee Members: Hélio Garcia Leite, Carlos Pedro Boechat Soares, Carlos Antônio Alvares Soares Ribeiro, Joel Gripp Junior, Laci Mota Alves, Vicente Paulo Soares.

Subjects/Keywords: Índices de vegetação; Imagem IKONOS II; Redes neurais; Biomassa; Carbono; MANEJO FLORESTAL; Vegetation indices; IKONOS II images; Neural networks; Biomass; Carbon

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APA (6th Edition):

Ferraz, A. S. (2012). Aboveground biomass and carbon stock estimations in a semideciduous forest using IKONOS II images. (Thesis). Universidade Federal de Viçosa. Retrieved from http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=4310

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Ferraz, Antonio Santana. “Aboveground biomass and carbon stock estimations in a semideciduous forest using IKONOS II images.” 2012. Thesis, Universidade Federal de Viçosa. Accessed December 13, 2019. http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=4310.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Ferraz, Antonio Santana. “Aboveground biomass and carbon stock estimations in a semideciduous forest using IKONOS II images.” 2012. Web. 13 Dec 2019.

Vancouver:

Ferraz AS. Aboveground biomass and carbon stock estimations in a semideciduous forest using IKONOS II images. [Internet] [Thesis]. Universidade Federal de Viçosa; 2012. [cited 2019 Dec 13]. Available from: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=4310.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ferraz AS. Aboveground biomass and carbon stock estimations in a semideciduous forest using IKONOS II images. [Thesis]. Universidade Federal de Viçosa; 2012. Available from: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=4310

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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