干旱区生态环境知识资源中心(Arid): Land uses, Nitrogen and Phosphorus estimated fluxes in a Brazilian semi-arid watershed

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DOI	10.1016/j.jaridenv.2019.01.001
	Land uses, Nitrogen and Phosphorus estimated fluxes in a Brazilian semi-arid watershed
	de Paula Filho, Francisco Jose; de Sa Sampaio, Andressa Dyalla; Coelho Menezes, Jorge Marcell; Ferreira da Costa, Celme Torres; Santiago, Marcelo Oliveira
通讯作者	de Paula Filho, Francisco Jose
来源期刊	JOURNAL OF ARID ENVIRONMENTS
ISSN	0140-1963
EISSN	1095-922X
出版年	2019
卷号	163 页码:41-49
英文摘要	This paper presents the estimates of nitrogen and phosphorus loads associated with different land uses in a semiarid watershed in the Brazilian northeast (NE). To calculate the annual loads and calibrate de estimates, we used emission factors related to natural processes and human activities from land uses and monitored the nutrient concentrations in surficial waters. The concentrations of TN were above the 2.18 mg N L-1 limit for lotic environments while the TP exceeded the limit value of 0.15 mg P L-1 established in the Brazilian legislation. The total loads L-eN.p corresponded to 16,621 t N yr(-1) and 3,211 t P yr(-1 )or 1,292 t N km(-2) yr(-1) and 250 t P km(-2) yr(-1). The anthropogenic emissions accounted for 82.1% of the N and 91.3% of the P emitted. The results for the Salgado river basin are lower than those estimated globally, but exceed the values obtained for the South American continent in an order of magnitude. The use of nutrient loads instead of concentrations, particularly in areas where detailed studies on nutrient concentrations are unavailable, such as in the semi-arid NE Brazil, may become a satisfactory approach to evaluate the sensitivity of aquatic systems to a further introduction of anthropogenic effluents.
英文关键词	Land uses Semi-arid Nitrogen Phosphorus Pollutants Emission factors
类型	Article
语种	英语
国家	Brazil
收录类别	SCI-E
WOS记录号	WOS:000459236300006
WOS关键词	RIVER-BASIN ; ANTHROPOGENIC EMISSIONS ; CYCLE ; CULTIVATION ; MANAGEMENT ; NUTRIENTS ; QUALITY ; SYSTEMS ; IMPACT ; EXPORT
WOS类目	Ecology ; Environmental Sciences
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/2XILL650/216728
作者单位	Fed Univ Cariri, Sci & Technol Ctr, Av Ten Raimundo Rocha 1639, BR-63048080 Juazeiro Do Norte, CE, Brazil
推荐引用方式 GB/T 7714	de Paula Filho, Francisco Jose,de Sa Sampaio, Andressa Dyalla,Coelho Menezes, Jorge Marcell,et al. Land uses, Nitrogen and Phosphorus estimated fluxes in a Brazilian semi-arid watershed[J],2019,163:41-49.
APA	de Paula Filho, Francisco Jose,de Sa Sampaio, Andressa Dyalla,Coelho Menezes, Jorge Marcell,Ferreira da Costa, Celme Torres,&Santiago, Marcelo Oliveira.(2019).Land uses, Nitrogen and Phosphorus estimated fluxes in a Brazilian semi-arid watershed.JOURNAL OF ARID ENVIRONMENTS,163,41-49.
MLA	de Paula Filho, Francisco Jose,et al."Land uses, Nitrogen and Phosphorus estimated fluxes in a Brazilian semi-arid watershed".JOURNAL OF ARID ENVIRONMENTS 163(2019):41-49.