干旱区生态环境知识资源中心(Arid): Causes and consequences of seasonal changes in the water flow of the Sao Francisco river in the semiarid of Brazil

Arid

DOI	10.1016/j.indic.2020.100084
	Causes and consequences of seasonal changes in the water flow of the Sao Francisco river in the semiarid of Brazil
	dos Santos, Anderson; Oliveira Lopes, Pabricio Marcos; da Silva, Marcos Vinicius; da Rosa Ferraz Jardim, Alexandre Manicoba; de Albuquerque Moura, Geber Barbosa; Tavares Fernandes, Gabriel Siqueira; de Oliveira Silva, Douglas Alberto; Bezerra da Silva, John Lennon; de Moraes Rodrigues, Joez Andre; Silva, Emanuel Araujo; de Oliveira-Junior, Jose Francisco
通讯作者	dos Santos, A (corresponding author), Univ Fed Rural Pernambuco, Dept Agr Engn, Rua Dom Manoel Medeiros S-N, BR-52171900 Recife, PE, Brazil.
来源期刊	ENVIRONMENTAL AND SUSTAINABILITY INDICATORS
ISSN	2665-9727
出版年	2020
卷号	8
英文摘要	The objective of this study was to evaluate the causes and consequences of changes in the water flow of the Sao Francisco River, on the border between the states of Sergipe and Alagoas, a Brazilian semiarid region. For this, we used images from the Landsat-8 satellite, OLI sensor, with a spatial resolution of 30 m. The results found in this study reveal two distinct behaviors in the study region of the Low Sao Francisco watershed, the first encompassing more homogeneous areas and with greater environmental preservation located in the West and the second encompassing heterogeneous areas with severe environmental degradation in the east of the study region. In general, due to the occurrence of exposed soil, thin vegetation, and regions of the high declivity, the basin has a high and very high degree of vulnerability in 73.8% of its land, with serious risks of desertification. According to the results of the Normalized Difference Water Index (NDWI), there was a drastic reduction in the surface area of water bodies along the Sao Francisco River channel, evidenced in the period from 2013 to 2018, with the expansion of sandbank areas in 17.7 km(2). Agricultural and livestock activity was configured as an important factor in increasing land vulnerability. The evidence in this study suggests that changes in land use and coverage induce increases in the sandbank areas within the river channel, even in periods of greater water volume, which causes the silting up of the Sao Francisco river bed in its low course.
英文关键词	Environmental degradation Remote sensing Vegetation index Multivariate analysis Erosion Landsat
类型	Article
语种	英语
开放获取类型	DOAJ Gold
收录类别	ESCI
WOS记录号	WOS:000646888000033
WOS关键词	DESERTIFICATION ; CLIMATE ; VARIABILITY ; NORTHEAST ; QUALITY ; TM
WOS类目	Environmental Sciences ; Environmental Studies
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/352572
作者单位	[dos Santos, Anderson; Oliveira Lopes, Pabricio Marcos; da Silva, Marcos Vinicius; da Rosa Ferraz Jardim, Alexandre Manicoba; de Albuquerque Moura, Geber Barbosa; Tavares Fernandes, Gabriel Siqueira; de Oliveira Silva, Douglas Alberto; Bezerra da Silva, John Lennon; de Moraes Rodrigues, Joez Andre] Univ Fed Rural Pernambuco, Dept Agr Engn, Rua Dom Manoel Medeiros S-N, BR-52171900 Recife, PE, Brazil; [Silva, Emanuel Araujo] Univ Fed Rural Pernambuco, Dept Forest Sci, Rua Dom Manoel Medeiros S-N, BR-52171900 Recife, PE, Brazil; [de Oliveira-Junior, Jose Francisco] Univ Fed Alagoas, Inst Atmospher Sci, Lourival Melo Mota Ave S-N, BR-57072970 Maceio, Alagoas, Brazil
推荐引用方式 GB/T 7714	dos Santos, Anderson,Oliveira Lopes, Pabricio Marcos,da Silva, Marcos Vinicius,et al. Causes and consequences of seasonal changes in the water flow of the Sao Francisco river in the semiarid of Brazil[J],2020,8.
APA	dos Santos, Anderson.,Oliveira Lopes, Pabricio Marcos.,da Silva, Marcos Vinicius.,da Rosa Ferraz Jardim, Alexandre Manicoba.,de Albuquerque Moura, Geber Barbosa.,...&de Oliveira-Junior, Jose Francisco.(2020).Causes and consequences of seasonal changes in the water flow of the Sao Francisco river in the semiarid of Brazil.ENVIRONMENTAL AND SUSTAINABILITY INDICATORS,8.
MLA	dos Santos, Anderson,et al."Causes and consequences of seasonal changes in the water flow of the Sao Francisco river in the semiarid of Brazil".ENVIRONMENTAL AND SUSTAINABILITY INDICATORS 8(2020).