气候变化领域集成服务门户(CCPortal): Statistical analysis of rainfall and streamflow time series in the Lake Tana Basin; Ethiopia

CCPortal

DOI	10.2166/wcc.2018.008
	Statistical analysis of rainfall and streamflow time series in the Lake Tana Basin; Ethiopia
	Tigabu T.B.; Hörmann G.; Wagner P.D.; Fohrer N.
发表日期	2020
ISSN	20402244
起始页码	258
结束页码	273
卷号	11 期号:1
英文摘要	This research focuses on the statistical analyses of hydrometeorological time series in the basin of Lake Tana, the largest freshwater lake in Ethiopia. We used autocorrelation, cross-correlation, Mann–Kendall, and Tukey multiple mean comparison tests to understand the spatiotemporal variation of the hydrometeorological data in the period from 1960 to 2015. Our results show that mean annual streamflow and the lake water level are varying significantly from decade to decade, whereas the mean annual rainfall variation is not significant. The decadal mean of the lake outflow and the lake water level decreased between the 1990s and 2000s by 11.34 m3/s and 0.35 m, respectively. The autocorrelation for both rainfall and streamflow were significantly different from zero, indicating that the sample data are non-random. Changes in streamflow and lake water level are linked to land use changes. Improvements in agricultural water management could contribute to mitigate the decreasing trends. © IWA Publishing 2020.
英文关键词	Autocorrelation; Cross-correlation; Hydrometeorology; Temporal variation; Tukey’s test
语种	英语
scopus关键词	Agricultural robots; Autocorrelation; Lakes; Land use; Rain; Stream flow; Time series; Water levels; Water management; Agricultural water management; Comparison test; Cross correlations; Fresh water lakes; Hydrometeorological data; Lake water level; Land-use change; Spatio-temporal variation; Time series analysis; flow modeling; numerical model; rainfall-runoff modeling; streamflow; trend analysis; water level; Ethiopia; Lake Tana
来源期刊	Journal of Water and Climate Change
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/147960
作者单位	Department of Hydrology and Water Resources Management, Institute for Natural Resource Conservation, Kiel University, Kiel, D-24118, Germany
推荐引用方式 GB/T 7714	Tigabu T.B.,Hörmann G.,Wagner P.D.,et al. Statistical analysis of rainfall and streamflow time series in the Lake Tana Basin; Ethiopia[J],2020,11(1).
APA	Tigabu T.B.,Hörmann G.,Wagner P.D.,&Fohrer N..(2020).Statistical analysis of rainfall and streamflow time series in the Lake Tana Basin; Ethiopia.Journal of Water and Climate Change,11(1).
MLA	Tigabu T.B.,et al."Statistical analysis of rainfall and streamflow time series in the Lake Tana Basin; Ethiopia".Journal of Water and Climate Change 11.1(2020).