干旱区生态环境知识资源中心(Arid): Climate change impact assessment on low streamflows using cross-entropy methods

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DOI	10.3354/cr01674
	Climate change impact assessment on low streamflows using cross-entropy methods
	Sheikh, Zahra; Nia, Alireza Moghaddam; Han, Dawei
通讯作者	Nia, AM (corresponding author)，Univ Tehran, Fac Nat Resources, Dept Rehabil Arid & Mt Reg, Karaj 3158777871, Iran.
来源期刊	CLIMATE RESEARCH
ISSN	0936-577X
EISSN	1616-1572
出版年	2021
卷号	85
英文摘要	Climate change impacts on low streamflows provide a comprehensive picture of the state of surface and groundwater resources, particularly in arid and semi-arid regions. The objective of this study was to assess climate change impacts on low streamflow variations by detecting long-term spatio-temporal changes in climatic variables of rainfall and temperature, and their associations with low streamflow fluctuations. Seasonal variations in low streamflows (summer and winter) were examined at 18 hydrometric stations located in the Namak Lake basin, Iran, over 1970-2015, using the modified Mann-Kendall and Sen's slope estimator methods. Seasonal low streamflow demonstrated a significant diminishing trend (more than 55% of the stations), while summer low streamflow showed a more drastic decreasing trend. Long-term changes in seasonal and annual rainfall/temperature also revealed a dominant decreasing trend in winter and spring rainfall (82% and 58% of all stations, respectively) and a dominant increasing trend in all temperature time scales (90% of all stations). The effects of climate variations on low streamflow were quantified by the Spearman's rank correlation and Cross-SampEn methods. The results revealed that winter rainfall, and annual and summer temperatures have the strongest association with seasonal low streamflows, especially according to the entropy method. Although the relationships between low streamflows and temperature/rainfall are related to the different processes generating streamflows, particularly in heterogeneous locations, the results show that rainfall has a stronger influence on low streamflows in the study region than temperature does. The research findings indicate low streamflows are more nonlinearly related to climatic parameters, and Cross-SampEn robustness reflects degree of asynchrony for complex and non-stationary time series.
英文关键词	Climate change Seasonal low streamflows Association Cross-SampEn Namak Lake basin
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000751732200011
WOS关键词	LOW FLOWS ; APPROXIMATE ENTROPY ; MANN-KENDALL ; TRENDS ; VARIABILITY ; RUNOFF ; RIVER ; REGRESSION ; RAINFALL ; BASIN
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/376000
作者单位	[Sheikh, Zahra] Semnan Univ, Fac Desert Studies, Dept Combat Desertificat, Semnan 9861413615, Iran; [Nia, Alireza Moghaddam] Univ Tehran, Fac Nat Resources, Dept Rehabil Arid & Mt Reg, Karaj 3158777871, Iran; [Han, Dawei] Univ Bristol, Dept Civil Engn, Bristol BS8 1TR, Avon, England
推荐引用方式 GB/T 7714	Sheikh, Zahra,Nia, Alireza Moghaddam,Han, Dawei. Climate change impact assessment on low streamflows using cross-entropy methods[J],2021,85.
APA	Sheikh, Zahra,Nia, Alireza Moghaddam,&Han, Dawei.(2021).Climate change impact assessment on low streamflows using cross-entropy methods.CLIMATE RESEARCH,85.
MLA	Sheikh, Zahra,et al."Climate change impact assessment on low streamflows using cross-entropy methods".CLIMATE RESEARCH 85(2021).