Principal Components Analysis (PCA) of Monument Stone Decay by Rainwater: A Case Study of “Basílica da Estrela” Church, Portugal

Proceedings

Figueiredo, Carlos¹  Alves, Carlos² 

[1] CERENA—Centro de Recursos Naturais e Ambiente, UID/ECI/04028/2013, DEcivil, Instituto SuperiorTécnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal;LandS/Lab2PT (Landscape, Heritage and Territory Laboratory), UID/AUR/04509/2013,POCI-01-0145-FEDER-007528 and Earth Sciences Department, School of Sciences, University of Minho,4710-057 Braga, Portugal

关键词: built environment;    water-induced alteration processes;    monument stone decay;    multivariate data;    Principal Components Analysis;   

DOI  :  10.3390/IECG_2018-05339

学科分类：社会科学、人文和艺术（综合）

来源: mdpi

【 摘 要 】

An extended version of Principal Components Analysis (PCA) of monument stone decay phenomena occurring at “Basilica da Estrela” church, Lisbon, Portugal, is now presented. The PCA rationale and general methodological procedure is presented, as a first step of a stepwise approach to the eigenvector methods of data analysis. PCA, as others “Eigenvector Methods”, seeks to reveal the underlying structure that might exist within a set of multivariate observations. Temperature, pH, electrical conductivity and main ionic species were measured on several seepage samples over three years inside the monument. PCA results are discussed in the perspective of a nondestructive tool.

【 授权许可】

CC BY