气候变化领域集成服务门户(CCPortal): Modelling the water balance of Lake Victoria (East Africa)-Part 1: Observational analysis

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DOI	10.5194/hess-22-5509-2018
	Modelling the water balance of Lake Victoria (East Africa)-Part 1: Observational analysis
	Vanderkelen I.; Van Lipzig N.P.M.; Thiery W.
发表日期	2018
ISSN	1027-5606
起始页码	5509
结束页码	5525
卷号	22 期号:10
英文摘要	Lake Victoria is the largest lake in Africa and one of the two major sources of the Nile river. The water level of Lake Victoria is determined by its water balance, consisting of precipitation on the lake, evaporation from the lake, inflow from tributary rivers and lake outflow, controlled by two hydropower dams. Due to a scarcity of in situ observations, previous estimates of individual water balance terms are characterized by substantial uncertainties, which means that the water balance is often not closed independently. In this first part of a two-paper series, we present a water balance model for Lake Victoria, using state-of-the-art remote sensing observations, high-resolution reanalysis downscaling and outflow values recorded at the dam. The uncalibrated computation of the individual water balance terms yields lake level fluctuations that closely match the levels retrieved from satellite altimetry. Precipitation is the main cause of seasonal and interannual lake level fluctuations, and on average causes the lake level to rise from May to July and to fall from August to December. Finally, our results indicate that the 2004-2005 drop in lake level can be about half attributed to a drought in the Lake Victoria Basin and about half to an enhanced outflow, highlighting the sensitivity of the lake level to human operations at the outflow dam. © 2018 Author(s).
语种	英语
scopus关键词	Remote sensing; Uncertainty analysis; Water levels; Hydropower dams; In-situ observations; Lake level fluctuations; Observational analysis; Rivers and lakes; Satellite altimetry; State of the art; Water balance models; Lakes; downscaling; human activity; hydrological modeling; in situ measurement; inflow; observatory; outflow; remote sensing; satellite altimetry; uncertainty analysis; water budget; water level; East African Lakes; Lake Victoria; Nile River
来源期刊	Hydrology and Earth System Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159874
作者单位	Vanderkelen, I., Department of Hydrology and Hydraulic Engineering, Vrije Universiteit Brussel, Brussels, Belgium; Van Lipzig, N.P.M., Department of Earth and Environmental Sciences, KU Leuven, Leuven, Belgium; Thiery, W., Department of Hydrology and Hydraulic Engineering, Vrije Universiteit Brussel, Brussels, Belgium, Institute for Atmospheric and Climate Science, ETH Zurich, Zurich, Switzerland
推荐引用方式 GB/T 7714	Vanderkelen I.,Van Lipzig N.P.M.,Thiery W.. Modelling the water balance of Lake Victoria (East Africa)-Part 1: Observational analysis[J],2018,22(10).
APA	Vanderkelen I.,Van Lipzig N.P.M.,&Thiery W..(2018).Modelling the water balance of Lake Victoria (East Africa)-Part 1: Observational analysis.Hydrology and Earth System Sciences,22(10).
MLA	Vanderkelen I.,et al."Modelling the water balance of Lake Victoria (East Africa)-Part 1: Observational analysis".Hydrology and Earth System Sciences 22.10(2018).