Interception effects on stable isotope driven streamwater transit time estimates

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Title:Main Title: Interception effects on stable isotope driven streamwater transit time estimates
Description:Abstract: Previous studies of streamwater transit time distributions (TTDs) used isotope tracer information from open precipitation (OP) as inputs to lumped watershed models that simulate the stream isotopic composition to estimate TTD. However, in forested catchments passage of rainfall through the canopy will alter the tracer signature of throughfall (TF) via interception. Here we test the effect of using TF instead of OP on TTD estimates. We sampled a 0.39 km2 catchment (Wüstebach, Germany) for a 19 month period using weekly precipitation and stream isotope data to evaluate changes in stream isotope simulation and TTDs. We found that TF had different effects on TTDs for δ18O and δ2H, with TF leading to up to 4 months shorter transit times. TTDs converged for both isotopes only when using TF. TF improved the stream isotope simulations. These results demonstrate the importance of canopy-induced isotope tracer changes in estimating streamwater TTDs in forested catchments.
Identifier:10.1002/2015GL064622 (DOI)
Citation Advice:Stockinger,M. P., A. Lücke, J. J. McDonnell, B. Diekkrüger, H. Vereecken, and H. R. Bogena (2015), Interception effects on stable isotope driven streamwater transit time estimates, Geophys. Res. Lett., 42, 5299–5308, doi:10.1002/2015GL064622.
Responsible Party
Creators:Michael Stockinger (Author), Andreas Lücke (Author), Jeffrey McDonnell (Author), Bernd Diekkrüger (Author), Harry Vereecken (Author), Heye Bogena (Author)
Publisher:Wiley, Hoboken, NJ, USA
Publication Year:2016
Topic
TR32 Topic:Other
Related Subproject:C1
Subject:Keyword: Hydrological Modelling
File Details
Filename:Stockinger2015Interception.pdf
Data Type:Text - Article
File Size:1.1 MB
Date:Available: 08.07.2015
Mime Type:application/pdf
Data Format:PDF
Language:English
Status:Completed
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Download Permission:Free
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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Publication Status:Published
Review Status:Peer reviewed
Publication Type:Article
Article Type:Journal
Source:Geophysical Research Letters
Number of Pages:10 (5299 - 5308)
Metadata Details
Metadata Creator:Michael Stockinger
Metadata Created:23.02.2016
Metadata Last Updated:23.02.2016
Subproject:C1
Funding Phase:2
Metadata Language:English
Metadata Version:V50
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