Water use in a riparian cottonwood ecosystem: Eddy covariance measurements and scaling along a river corridor

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• 作者：Lawrence B. Flanagan^a ; ^{larry.flanagan@uleth.ca} ; Trina E. Orchard^a ; Gordon S.J. Logie^b ; Craig A. Coburn^b ; Stewart B. Rood^a
• 关键词：Leaf area index ; Penman-Monteith equation ; Phenology ; Populus spp ; Stomatal conductance ; Water-use efficiency
• 刊名：Agricultural and Forest Meteorology
• 出版年：2017
• 出版时间：15 January 2017
• 年：2017
• 卷：232
• 期：Complete
• 页码：332-348
• 全文大小：4590 K
• 卷排序：232

文摘

Cottonwood evapotranspiration (ET) was measured and up-scaled along a river. Cumulative ET was very similar in 2 years despite contrasting precipitation input. Growing season ET was approximately 1% of average river flow rates. Ratio of ET to river flow increased markedly to peak values of 4–5% in August. Cottonwood water use was high because of tree access to alluvial groundwater.