干旱区生态环境知识资源中心(Arid): Principal component analysis and biophysical parameters in the assessment of soil salinity in the irrigated perimeter of Bahia, Brazil

Arid

DOI	10.1016/j.jsames.2021.103580
	Principal component analysis and biophysical parameters in the assessment of soil salinity in the irrigated perimeter of Bahia, Brazil
	da Silva, Diego Castro; Oliveira Lopes, Pabricio Marcos; da Silva, Marcos Vinicius; de Albuquerque Moura, Geber Barbosa; Nascimento, Cristina Rodrigues; Barbosa Brito, Jose Ivaldo; de Franca e Silva, Enio Farias; Rolim, Mario Monteiro; de Lima, Renato Paiva
通讯作者	da Silva, DC (corresponding author), Fed Rural Univ Pernambuco UFRPE, Recife, PE, Brazil.
来源期刊	JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
ISSN	0895-9811
EISSN	1873-0647
出版年	2021
卷号	112
英文摘要	Soil salinity is an environmental concern which can lead to land desertification. It is a common problem in the semiarid region of northeastern Brazil and its impacts extend from the environment to the economy. The objective of this study was to evaluate soil salinity in the dry period in an agricultural area of irrigated Manicoba perimeter, in Juazeiro, State of Bahia, Brazil. The study was carried out in an agricultural area of the irrigated perimeter in Juazeiro of Bahia, Brazil, where 98 disturbed soil samples were collected in different areas, being 33 samples to obtain Electrical Conductivity (EC) (dS m-1) and regression models, and 65 samples to validate the models. Images from the Landsat-8 and Sentinel-2 satellites were used to obtain the biophysical parameters: NDVI, SAVI, EVI, and GDVI vegetation indices, SI-1, SI-2, SI-3, and IB salinity indices, albedo, temperature (TSUP), and real evapotranspiration (ETR). Descriptive statistics and principal component analysis (PCA) were applied to identify majors EC and biophysical parameters relationships, and select the best predictors to generate equations capable of estimating soil salinity across the irrigated perimeter. The EC showed a high standard deviation and coefficient of variation compared to the other variables, with higher concentrations observed in areas of bare soil, followed by natural vegetation and agricultural vegetation. TSUP and GDVI were the predictors most strongly related to EC, for images Landsat-8 and Sentinel-2 respectively, with R2 of 73% and 71%. The application of the generated models presented satisfactory validation for two distinct areas. The maps obtained were similar in terms of the distribution of soil saline levels, confirming what was observed in the field scale, with a greater level of detail for the map from Sentinel-2.
英文关键词	Multivariate Remote sensing Salinity Semiarid
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000708299000006
WOS关键词	LANDSAT 8 OLI ; VEGETATION ; SENTINEL-2 ; INDEX
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368145
作者单位	[da Silva, Diego Castro; Oliveira Lopes, Pabricio Marcos; da Silva, Marcos Vinicius; de Franca e Silva, Enio Farias; Rolim, Mario Monteiro; de Lima, Renato Paiva] Univ Fed Rural Pernambuco, Dept Agr Engn, Dom Manoel de Medeiros Ave SN, BR-52171900 Recife, PE, Brazil; [Oliveira Lopes, Pabricio Marcos; de Albuquerque Moura, Geber Barbosa; Nascimento, Cristina Rodrigues] Univ Fed Rural Pernambuco, Dept Agron, Dom Manoel de Medeiros Ave SN, BR-52171900 Recife, PE, Brazil; [Barbosa Brito, Jose Ivaldo] Univ Fed Campina Grande, Acad Unit Atmospher Sci, Aprigio Veloso Ave 882, BR-58109970 Campina Grande, Paraiba, Brazil
推荐引用方式 GB/T 7714	da Silva, Diego Castro,Oliveira Lopes, Pabricio Marcos,da Silva, Marcos Vinicius,et al. Principal component analysis and biophysical parameters in the assessment of soil salinity in the irrigated perimeter of Bahia, Brazil[J],2021,112.
APA	da Silva, Diego Castro.,Oliveira Lopes, Pabricio Marcos.,da Silva, Marcos Vinicius.,de Albuquerque Moura, Geber Barbosa.,Nascimento, Cristina Rodrigues.,...&de Lima, Renato Paiva.(2021).Principal component analysis and biophysical parameters in the assessment of soil salinity in the irrigated perimeter of Bahia, Brazil.JOURNAL OF SOUTH AMERICAN EARTH SCIENCES,112.
MLA	da Silva, Diego Castro,et al."Principal component analysis and biophysical parameters in the assessment of soil salinity in the irrigated perimeter of Bahia, Brazil".JOURNAL OF SOUTH AMERICAN EARTH SCIENCES 112(2021).