Articles
WATER RELEASE BY NORWAY SPRUCE STAND DURING EXTREME HUMID CONDITIONS
Article number
846_35
Pages
309 – 314
Language
English
Abstract
Evapotranspiration of a young Norway spruce stand (25 year old) located at the Experimental research site Bílý Kří in the Beskydy Mts was investigated to evaluate relative proportions of active and passive stand water release during wet and dry summer days.
Water release by the forest stand (i.e. evapotranspiration, ET) was evaluated using two methods: eddy-covariance and Bowen ratio.
Transpiration (as an active part of ET) was evaluated using sap-flow measurements.
ET by eddy-covariance method was found to underestimate real water release values by the spruce stand.
During dry days (no precipitation, limited soil water, high evaporative demand) as well as during the wet days (plentiful soil water, precipitation >4.5 mm day-1) active evaporation was 44-45% of ET. During other periods, ET comprised 73% of transpiration.
Water release by the forest stand (i.e. evapotranspiration, ET) was evaluated using two methods: eddy-covariance and Bowen ratio.
Transpiration (as an active part of ET) was evaluated using sap-flow measurements.
ET by eddy-covariance method was found to underestimate real water release values by the spruce stand.
During dry days (no precipitation, limited soil water, high evaporative demand) as well as during the wet days (plentiful soil water, precipitation >4.5 mm day-1) active evaporation was 44-45% of ET. During other periods, ET comprised 73% of transpiration.
Publication
Authors
R. Pokorný, I. Tomá¿ková
Keywords
eddy-covariance, evaporation, Picea abies, sap flow, transpiration
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