[659] - Within-Field Variability of Bare Soil Evaporation Derived from Eddy Covariance Measurements

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Vanderborght, J., Graf, A., Steenpass, C., Scharnagl, B., Prolingheuer, N., Herbst, M., Hendricks-Franssen, H., 2010. Within-Field Variability of Bare Soil Evaporation Derived from Eddy Covariance Measurements. Vadose Zone Journal, 9 (4), 943 - 954. DOI: 10.2136/vzj2009.0159.
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Title(s):Main Title: Within-Field Variability of Bare Soil Evaporation Derived from Eddy Covariance Measurements
Description(s):Abstract: Bare soil evaporation was measured with the eddy-covariance method at the Selhausen field site. The site has a distinct gradient in soil texture, with a considerably higher stone content at the upper part of the field. We investigated the effect of different soil properties in the upper and lower parts of the field on evaporation using eddy covariance (EC) measurements that were combined with a footprint model. Because only one EC station was available, simultaneous evaporation measurements from the two field parts were not available. Therefore, measurements were put into the context of meteorologic and soil hydrologic conditions. Meteorologic conditions were represented by the potential evaporation, i.e., the maximum evaporation that is determined by the energy available for evaporation. The influence of precipitation and soil hydrologic conditions on the actual evaporation rate was represented by a simple soil evaporation model. The amount of water that could be evaporated at the potential rate from the lower part of the field was found to be large and considerably larger than from the upper part of the field. The difference in evaporation led to threefold larger predicted percolation or runoff in the upper than the lower part of the field. Simulations using the Richards equation were able to reproduce the differences in evaporation between the lower and upper parts of the field and relate them to the different groundwater table depths in the two parts of the field.
Identifier(s):DOI: 10.2136/vzj2009.0159
Responsible Party
Creator(s):Author: Jan Vanderborght
Author: Alexander Graf
Author: Christian Steenpass
Author: Benedikt Scharnagl
Author: Nils Prolingheuer
Author: Michael Herbst
Author: Harrie-Jan Hendricks-Franssen
Publisher:Soil Science Society of America
TR32 Topic:Soil
Subject(s):CRC/TR32 Keywords: Eddy Covariance, Soil Moisture, Exchange, Water
File Details
File Name:2010_Vanderborght_VZJ.pdf
Data Type:Text
Size(s):12 Pages
File Size:2048 kB (2 MB)
Date(s):Issued: 2010-09-07
Mime Type:application/pdf
Data Format:PDF
Download Permission:OnlyTR32
General Access and Use Conditions:For internal use only
Access Limitations:For internal use only
Licence:TR32DB Data policy agreement
Measurement Region:Ellebach
Measurement Location:Selhausen
Specific Informations - Publication
Article Type:Journal
Source:Vadose Zone Journal
Number Of Pages:12
Page Range:943 - 954
Metadata Details
Metadata Creator:Jan Vanderborght
Metadata Created:2013-12-02
Metadata Last Updated:2013-12-02
Funding Phase:1
Metadata Language:English
Metadata Version:V40
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