Frequency variation of mechanical waves of the impulse tomograph based on geographic north

Autor(es)

Mendes, Flavio Henrique ^[1] ; da Silva Filho, Demostenes Ferreira ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Forestry Dept, ESALQ, Piracicaba, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: SCIENTIA FORESTALIS; v. 47, n. 122, p. 353-358, JUN 2019.
• Citações Web of Science: 0

Resumo

Tensile wood and opposite wood are specialized tissues developed in angiosperms. The first occur on the upper side, while the second, the lower side. This paper analyzed the influence of the prevailing east/southeast winds on the formation of tension wood and opposite wood in tree trunks of angiosperms in a tropical city, using an impulse tomography array, in cross sections. The use of tomographic imaging has gained support for evaluating tree health as it is a non-destructive and comprehensive methodology. A total of 27 trees were analyzed, being one of each species, in a urban park at Piracicaba/SP/Brazil. The R-squared value of the linear regression of basic density and wave propagation speed from the trees was 0.3271, revealing that each tree is a specific case and the analysis must be done in an individualized mode. Once obtained the tomographic images, they were divided into quadrants: in 70% of cases there was a predominance of highest values for mechanical wave propagation speed in quadrants 2 and 3, revealing the proving influence of the predominant east and southeast wind. (AU)

• Processo FAPESP: 09/53931-6 - Certificação em silvicultura urbana como instrumento de política pública
• Beneficiário: Demóstenes Ferreira da Silva Filho
• Modalidade de apoio: Auxílio à Pesquisa - Pesquisa em Políticas Públicas