DOI: 10.1016/j.gloplacha.2012.12.003
论文题名: River flow trends in the west of Iran during the past 40years: Impact of precipitation variability
作者: Abghari H. ; Tabari H. ; Hosseinzadeh Talaee P.
刊名: Global and Planetary Change
ISSN: 0921-8333
出版年: 2013
卷: 101 起始页码: 52
结束页码: 60
语种: 英语
英文关键词: Correlation
; Hamedan province
; Precipitation
; Streamflow
; Trend analysis
Scopus关键词: Annual precipitation
; Correlation analysis
; Hamedan province
; Hydrological changes
; Hydrological years
; Kendall's tau
; Mann-Kendall
; Non-parametric
; Pearson correlation
; Precipitation variability
; River discharge
; River flow
; Spearman's rho
; Temporal trends
; Trend analysis
; Western region
; Climate change
; Optical correlation
; Precipitation (chemical)
; Precipitation (meteorology)
; Stream flow
; climate change
; climate effect
; correlation
; hydrological change
; mountain region
; precipitation (climatology)
; river discharge
; river flow
; streamflow
; time series analysis
; trend analysis
; Hamadan
; Iran
英文摘要: A better understanding of hydrological changes associated with climate change can be achieved by analyzing the temporal trends in river discharge time series. We used the non-parametric Spearman's rho, Kendall's tau, Mann-Kendall and Theil-Sen approaches to evaluate annual and monthly trends in river flow data from 12 stations located in the mountainous western regions of Iran over a 40-year period spanning the hydrological years 1969-1970 to 2008-2009. The Pearson correlation analysis was also applied to explore the relationships between precipitation and river flow series. Using a 5% significance level, we found an evidence of downward trends in annual river discharge at Varayeneh, Omar-Abad, Saleh-Abad, Zehtaran and Bahadorbeig stations at the rates of 0.491, 1.00, 0.101, 0.044, and 0.020m3/s per decade, respectively. These significant downward trends started in the hydrological years of 2005-2006, 2000-2001, 2006-2007, 1995-1996 and 1995-1996, respectively. The greatest numbers of stations with significant river discharge trends occur in October and November, accounting for seven and six stations respectively. Annual precipitation exhibited no strong directional trend, although the tendency was toward increasing annual precipitation. Monthly precipitation variability seems to be also increasing for most of the months but no overall trend pattern in monthly precipitation totals emerged. Correlation analyses indicated strong relationships between river discharge and precipitation at the annual scale and for most of the months. © 2012 Elsevier B.V. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84872201152&doi=10.1016%2fj.gloplacha.2012.12.003&partnerID=40&md5=71b68fb3e7e7803758025769addab1db
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/11239
Appears in Collections: 全球变化的国际研究计划
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作者单位: Department of Watershed Management, Faculty of Natural Resources, Urmia University, Urmia, Iran
Recommended Citation:
Abghari H.,Tabari H.,Hosseinzadeh Talaee P.. River flow trends in the west of Iran during the past 40years: Impact of precipitation variability[J]. Global and Planetary Change,2013-01-01,101.