Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/s00704-015-1661-1 |
Influence of climate variability on land degradation (desertification) in the watershed of the upper Paraiba River | |
Bezerra Alves, Telma Lucia1; de Azevedo, Pedro Vieira2; Costa dos Santos, Carlos Antonio2 | |
通讯作者 | Costa dos Santos, Carlos Antonio |
来源期刊 | THEORETICAL AND APPLIED CLIMATOLOGY
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ISSN | 0177-798X |
EISSN | 1434-4483 |
出版年 | 2017 |
卷号 | 127期号:3-4页码:741-751 |
英文摘要 | The study aimed to evaluate the influence of the rainfall and aridity index variability on the process of land degradation (desertification) in order to establish the current degree of increase or decrease in dryness in the watershed of the upper Paraiba River. It included all or part of 18 municipalities, distributed in the western and eastern Cariri regions of Paraiba state. The monthly average values of reference evapotranspiration according to Penman-Monteith method were applied in the annual hydrological balance for obtaining the annual time series of the aridity index for the period from 1950 to 2013. The Mann-Kendall test (MK) was used for trend identification in the annual time series of rainfall and aridity index, at a significance level of alpha = 0.05. The slope of the trends was obtained by Sen’s method, and the values of rainfall, aridity index, and statistics MK were spatially kriging, to generate thematic maps. The results indicate an increase in rainfall and reduced dryness in the watershed of the upper Paraiba River, conditions that do not contribute to trigger the process of land degradation (desertification), indicating that the cause of this environmental problem is not climatic. Thus, it can be suggested that the observed manifestations of land degradation (desertification) derive much of human than climatic actions. However, there is a trend of increasing dryness and reducing rainfall in the central portion of the watershed, with stronger core in the location of CamalaA. The spatial distribution of rainfall and aridity index shows that minimum values of rainfall coincide with maximum values of the aridity index. Higher values of rainfall were observed in the northwestern portion of the watershed, while the northeast and southeast portions had the lower rainfall values, with the strongest core in the locality of Cabaceiras. The eastern sector of the watershed has high dryness, unlike the western sector, rainier, with minimum values of dryness. In the western portion of the watershed, the aridity index was in the range considered semiarid, with moderate susceptibility to land degradation process. Similarly, in the eastern portion, the dryness stood in the range considered arid, with high susceptibility. The cores with more pronounced dryness correspond to the municipalities of Cabaceiras, CaraAbas, and So Joo do Cariri. |
类型 | Article |
语种 | 英语 |
国家 | Brazil |
收录类别 | SCI-E |
WOS记录号 | WOS:000393667700017 |
WOS关键词 | ARIDITY INDEX ; REFERENCE EVAPOTRANSPIRATION ; TEMPORAL VARIABILITY ; NORTHEASTERN BRAZIL ; REGION ; DYNAMICS ; TRENDS ; CHINA |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/202665 |
作者单位 | 1.Univ Fed Campina Grande, Programa Posgrad Recursos Nat, Campina Grande, Paraiba, Brazil; 2.Univ Fed Campina Grande, Programa Posgrad Recursos Nat, Unidade Acad Ciencias Atmosfer, Campina Grande, Paraiba, Brazil |
推荐引用方式 GB/T 7714 | Bezerra Alves, Telma Lucia,de Azevedo, Pedro Vieira,Costa dos Santos, Carlos Antonio. Influence of climate variability on land degradation (desertification) in the watershed of the upper Paraiba River[J],2017,127(3-4):741-751. |
APA | Bezerra Alves, Telma Lucia,de Azevedo, Pedro Vieira,&Costa dos Santos, Carlos Antonio.(2017).Influence of climate variability on land degradation (desertification) in the watershed of the upper Paraiba River.THEORETICAL AND APPLIED CLIMATOLOGY,127(3-4),741-751. |
MLA | Bezerra Alves, Telma Lucia,et al."Influence of climate variability on land degradation (desertification) in the watershed of the upper Paraiba River".THEORETICAL AND APPLIED CLIMATOLOGY 127.3-4(2017):741-751. |
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