Spatiotemporal relations between water budget components and soil water content in a forested tributary catchment

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Title:Main Title: Spatiotemporal relations between water budget components and soil water content in a forested tributary catchment
Description:Abstract: We examined 3 years of measured daily values of all major water budget components (precipitation P, potential evapotranspiration PET, actual evapotranspiration ET, and runoff R) and volumetric soil water content θ of a small, forested catchment located in the west of Germany. The spatial distribution of θ was determined from a wireless sensor network of 109 points with 3 measurement depths each; ET was calculated from eddy-covariance tower measurements. The water budget was dominantly energy limited, with ET amounting to approximately 90% of PET, and a runoff ratio R/P of 56%. P, ET, and R closed the long-term water budget with a residual of 2% of precipitation. On the daily time scale, the residual of the water budget was larger than on the annual time scale, and explained to a moderate extent by θ (R2 = 0.40). Wavelet analysis revealed subweekly time scales, presumably dominated by unaccounted fast-turnover storage terms such as interception, as a major source of uncertainty in water balance closure. At weekly resolution, soil water content explained more than half (R2 = 0.62) of the residual. By means of combined empirical orthogonal function and cluster analysis, two slightly different spatial patterns of θ could be identified that were associated with mean θ values below and above 0.35 cm3/cm3, respectively. The timing of these patterns as well as the varying coherence between PET, ET, and soil water content responded to changes in water availability, including a moderate response to the European drought in spring 2011.
Identifier:10.1002/2013WR014516 (DOI)
Citation Advice:Graf, A., Bogena, H.R., Drüe, C., Hardelauf, H., Pütz, T., Heinemann, G., Vereecken, H., 2014. Spatiotemporal relations between water budget components and soil water content in a forested tributary catchment. Water Resources Research 50, 4837-4857, doi:10.1002/2013WR014516.
Responsible Party
Creators:Alexander Graf (Author), Heye Bogena (Author), Clemens Drüe (Author), Horst Hardelauf (Author), Thomas Pütz (Author), Günther Heinemann (Author), Harry Vereecken (Author)
Funding References:Deutsche Forschungsgemeinschaft (DFG): CRC/TRR 32: Patterns in Soil-Vegetation-Atmosphere Systems: Monitoring, Modelling and Data Assimilation
Helmholtz-Gemeinschaft: TERENO: TERestrial ENvironmental Observatories network of the Helmholtz Association
Publisher:Wiley
Publication Year:2014
Topic
TR32 Topic:Soil
Related Subproject:Z3
Subjects:Keywords: Soil Moisture, Atmosphere–Land Interaction, Catchment Hydrology, Pattern
Geogr. Information Topic:Climatology/Meteorology/Atmosphere
File Details
Filename:Graf_et_al_2014_WRR.pdf
Data Type:Text - Article
File Size:1.7 MB
Date:Available: 12.06.2014
Mime Type:application/pdf
Data Format:PDF
Language:English
Status:Completed
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Download Permission:Only Project Members
General Access and Use Conditions:According to the TR32DB data policy agreement.
Access Limitations:According to the TR32DB data policy agreement.
Licence:[TR32DB] Data policy agreement
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Specific Information - Publication
Publication Status:Published
Review Status:Peer reviewed
Publication Type:Article
Source:Water Resources Research
Source Website:http://agupubs.onlinelibrary.wiley.com/agu/journal/10.1002/%28ISSN%291944-7973/
Issue:6
Volume:50
Number of Pages:21 (4837 - 4857)
Metadata Details
Metadata Creator:Alexander Graf
Metadata Created:26.08.2014
Metadata Last Updated:26.08.2014
Subproject:Z3
Funding Phase:2
Metadata Language:English
Metadata Version:V50
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