globalchange  > 气候变化事实与影响
DOI: 10.5194/hess-20-4801-2016
Scopus记录号: 2-s2.0-85003758653
论文题名:
Recent trends and variability in river discharge across northern Canada
作者: Déry S; J; , Stadnyk T; A; , MacDonald M; K; , Gauli-Sharma B
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2016
卷: 20, 期:12
起始页码: 4801
结束页码: 4818
语种: 英语
Scopus关键词: Digital storage ; Hydroelectric power ; Oceanography ; Rivers ; Coefficient of variation ; Data availability ; Flow regulation ; Hydro power production ; Interannual variability ; Mann-Kendall test ; Natural variability ; Regional variation ; River diversion ; annual variation ; data acquisition ; data quality ; flow regulation ; gauge ; hydroelectric power ; river discharge ; river flow ; trend analysis ; Arctic Ocean ; Atlantic Ocean ; Bering Sea ; Canada ; Hudson Bay ; James Bay ; La Grande River ; Labrador Sea ; Pacific Ocean ; Quebec [Canada]
英文摘要: This study presents an analysis of the observed inter-annual variability and inter-decadal trends in river discharge across northern Canada for 1964-2013. The 42 rivers chosen for this study span a combined gauged area of 5.26 × 106km2 and are selected based on data availability and quality, gauged area and record length. Inter-annual variability in river discharge is greatest for the eastern Arctic Ocean (coefficient of variation, CV = 16%) due to the Caniapiscau River diversion into the La Grande Rivière system for enhanced hydropower production. Variability is lowest for the study area as a whole (CV = 7%). Based on the Mann-Kendall test (MKT), no significant (p > 0.05) trend in annual discharge from 1964 to 2013 is observed in the Bering Sea, western Arctic Ocean, western Hudson and James Bay, and Labrador Sea; for northern Canada as a whole, however, a statistically significant (p < 0.05) decline of 102.8km3 25yr-1 in discharge occurs over the first half of the study period followed by a statistically significant (p < 0.05) increase of 208.8km3 25yr-1 in the latter half. Increasing (decreasing) trends in river discharge to the eastern Hudson and James Bay (eastern Arctic Ocean) are largely explained by the Caniapiscau diversion to the La Grande Rivière system. Strong regional variations in seasonal trends of river discharge are observed, with overall winter (summer) flows increasing (decreasing, with the exception of the most recent decade) partly due to flow regulation and storage for enhanced hydropower production along the Hudson and James Bay, the eastern Arctic Ocean and Labrador Sea. Flow regulation also suppresses the natural variability of river discharge, particularly during cold seasons. © 2016 The Author (S).
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78673
Appears in Collections:气候变化事实与影响

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作者单位: Environmental Science and Engineering Program, University of Northern British Columbia, Prince George, BC, Canada; Department of Civil Engineering, University of Manitoba, Winnipeg, MA, Canada

Recommended Citation:
Déry S,J,, Stadnyk T,et al. Recent trends and variability in river discharge across northern Canada[J]. Hydrology and Earth System Sciences,2016-01-01,20(12)
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