TAILIEUCHUNG - Partitioning rainfall into throughfall, stemflow, and interception loss in an oriental beech (Fagus orientalis Lipsky) forest during the growing season
Partitioning gross rainfall (GR) into throughfall (TF), stemflow (SF), and interception loss (I), which has a very significant effect on water balance and the nutrient cycle in forest ecosystems, was studied in a natural oriental beech (Fagus orientalis Lipsky) forest situated in the Caspian Forest of northern Iran. | Research Article Turk J Agric For 33 (2009) 557-568 © TÜBİTAK doi: Partitioning rainfall into throughfall, stemflow, and interception loss in an oriental beech (Fagus orientalis Lipsky) forest during the growing season Mohammad Taghi AHMADI1, Pedram ATTAROD1,*, Mohammad Reza MARVI MOHADJER1, Ramin RAHMANI2, Jafar FATHI3 1Forestry and Forest Economics Department, Faculty of Natural Resources, University of Tehran, Karaj - IRAN 2Faculty of Forestry and Wood Industries, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan - IRAN 3Kheyrud Forest Research Station, Faculty of Natural Resources, University of Tehran, Karaj - IRAN Received: Abstract: Partitioning gross rainfall (GR) into throughfall (TF), stemflow (SF), and interception loss (I), which has a very significant effect on water balance and the nutrient cycle in forest ecosystems, was studied in a natural oriental beech (Fagus orientalis Lipsky) forest situated in the Caspian Forest of northern Iran. Measurements were made inside a plot with an area of ha located in the Kheyrud Forest Research Station of Tehran University during the 2008 growing season. GR was measured based on an average of the records of 3 rain gauges located in an open area approximately 160 m from the study plot. Thirty-six TF manual gauges were randomly placed beneath the beech canopies and SF was collected from 6 selected beech trees using spiral-type SF collection collars. Measurements were made on a rainfall event basis. The cumulative GR depth of 23 events was mm; TF: mm; SF: mm; I: mm. On the event scale average ratios of TF:GR, SF:GR, and I:GR were , , and , respectively. A strong positive correlation was observed between SF:GR and GR (r2 = ), while very weak correlations were observed between I:GR and GR (r2 = ), and between TF:GR and GR (r2 = ). As the size of rainfall events increased, intercepted GR by the oriental .
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