干旱区生态环境知识资源中心(Arid): Qualitative vulnerability of the waters of a surface reservoir subjected to drought in a tropical semi-arid region1

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DOI	10.5935/1806-6690.20230033
	Qualitative vulnerability of the waters of a surface reservoir subjected to drought in a tropical semi-arid region1
	de Mendonca, Janaina Castro; Lopes, Fernando Bezerra; de Andrade, Eunice Maia; Praxedes, Carine Fernandes; Lima, Francisco Josivan de Oliveira; da Silva, Fernanda Helena Oliveira
通讯作者	Lopes, FB
来源期刊	REVISTA CIENCIA AGRONOMICA
ISSN	0045-6888
EISSN	1806-6690
出版年	2023
卷号	54
英文摘要	Irregular rainfall and the occurrence of droughts in tropical semi-arid regions have a negative impact on the quality and availability of water stored in reservoirs. The aim of this study was to evaluate the quality of water stored in an artificial reservoir in the tropical semi-arid region of Brazil during years of drought. The study area was the Pereira de Miranda reservoir, located in the district of Pentecoste, Ceara, Brazil. Seven water-sampling campaigns were carried out between April 2015 and September 2016. The variables to be analysed were chlorophyll-a (Cl-a), hydrogen potential (pH), electrical conductivity (EC), total nitrogen (Ntotal), total phosphorus (Ptotal), transparency (SD), fixed/volatile/total suspended solids (FSS/VSS/TSS), and temperature (T0); the trophic state index (TSI) was then calculated. The variables which better explained the variance in water quality were identified by principal component analysis (PCA). The waters of the Pereira de Miranda reservoir were classified as hyper-eutrophic throughout the study period and at each of the collection points. The PCA identified that the variability in water quality was determined by suspended sediment and nutrients, showing that the reduction in variables made it possible to obtain high explainability of the conditions of the reservoir during monitoring, saving time and resources on the analyses. In addition, the occurrence of severe drought resulted in low accumulated volumes, which intensified and made vulnerable the quality of the waters. As such, the Pereira de Miranda reservoir proved to be in a process of degradation, mainly due to anthropogenic action, intensified by climate factors.
英文关键词	Monitoring Eutrophication Principal component analysis
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000991205500001
WOS关键词	TROPHIC STATE INDEX ; EUTROPHICATION
WOS类目	Agriculture, Multidisciplinary
WOS研究方向	Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/398416
推荐引用方式 GB/T 7714	de Mendonca, Janaina Castro,Lopes, Fernando Bezerra,de Andrade, Eunice Maia,et al. Qualitative vulnerability of the waters of a surface reservoir subjected to drought in a tropical semi-arid region1[J],2023,54.
APA	de Mendonca, Janaina Castro,Lopes, Fernando Bezerra,de Andrade, Eunice Maia,Praxedes, Carine Fernandes,Lima, Francisco Josivan de Oliveira,&da Silva, Fernanda Helena Oliveira.(2023).Qualitative vulnerability of the waters of a surface reservoir subjected to drought in a tropical semi-arid region1.REVISTA CIENCIA AGRONOMICA,54.
MLA	de Mendonca, Janaina Castro,et al."Qualitative vulnerability of the waters of a surface reservoir subjected to drought in a tropical semi-arid region1".REVISTA CIENCIA AGRONOMICA 54(2023).