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| Titel |
Linking soil- and stream-water chemistry based on a Riparian Flow-Concentration Integration Model |
| VerfasserIn |
J. Seibert, T. Grabs, S. Köhler, H. Laudon, M. Winterdahl, K. Bishop |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 13, no. 12 ; Nr. 13, no. 12 (2009-12-02), S.2287-2297 |
| Datensatznummer |
250012065
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| Publikation (Nr.) |
 copernicus.org/hess-13-2287-2009.pdf |
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| Zusammenfassung |
| The riparian zone, the last few metres of soil through which water flows
before entering a gaining stream, has been identified as a first order
control on key aspects of stream water chemistry dynamics. We propose that
the distribution of lateral flow of water across the vertical profile of
soil water chemistry in the riparian zone provides a conceptual explanation
of how this control functions in catchments where matrix flow predominates.
This paper presents a mathematical implementation of this concept as well as
the model assumptions. We also present an analytical solution, which
provides a physical basis for the commonly used power-law flow-load
equation. This approach quantifies the concept of riparian control on
stream-water chemistry providing a basis for testing the concept of riparian
control. By backward calculation of soil-water-chemistry profiles, and
comparing those with observed profiles we demonstrate that the simple
juxtaposition of the vertical profiles of water flux and soil water
chemistry provides a plausible explanation for observed variations in stream
water chemistry of several major stream components such as Total Organic
Carbon (TOC), magnesium, calcium and chloride. The "static" implementation
of the model structure presented here provides a basis for further
development to account for seasonal influences and hydrological hysteresis
in the representation of hyporheic, riparian, and hillslope processes. |
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