Evapotranspiration in the Nile Basin: Identifying Dynamics and Drivers, 2002–2011
作者： Henok Alemu , Armel Kaptué , Gabriel Senay , Michael Wimberly , Geoffrey Henebry
DOI: 10.3390/W7094914
关键词:
摘要: Analysis of the relationship between evapotranspiration (ET) and its natural anthropogenic drivers is critical in water-limited basins such as Nile. The spatiotemporal relationships ET with rainfall vegetation dynamics Nile Basin during 2002-2011 were analyzed using satellite-derived data. Non-parametric statistics used to quantify ET-rainfall interactions trends across land cover types subbasins. We found that 65% study area (2.5 million km 2 ) showed significant (p < 0.05) positive correlations monthly rainfall, whereas 7% negative correlations. As expected, observed over vegetation, mixed croplands/natural croplands, a few subbasin-specific exceptions. In particular, irrigated wetlands some forests exhibited Trend tests revealed spatial clusters statistically (6% was negative; 12% positive), greenness (24% positive) (11% 1% 2002-2011. Delta, Ethiopian highlands central Uganda regions decline while parts Sudan, South southwestern Ethiopia northeastern increases. Except for
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