uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
Riparian zone hydrology and soil water total organic carbon (TOC): implications for spatial variability and upscaling of lateral riparian TOC exports
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, Umeå, Sweden.
Department of Physical Geography and Quaternary Geology, Stockholm University, Stockholm, Sweden.
Show others and affiliations
2012 (English)In: Biogeosciences, ISSN 1726-4170, Vol. 9, no 10, 3901-3916 p.Article in journal (Refereed) Published
Abstract [en]

Groundwater flowing from hillslopes through riparian (near-stream) soils often undergoes chemical transformations that can substantially influence stream water chemistry. We used landscape analysis to predict total organic carbon (TOC) concentration profiles and groundwater levels measured in the riparian zone (RZ) of a 67 km2 catchment in Sweden. TOC exported laterally from 13 riparian soil profiles was then estimated based on the riparian flow-concentration integration model (RIM). Much of the observed spatial variability of riparian TOC concentrations in this system could be predicted from groundwater levels and the topographic wetness index (TWI). Organic riparian peat soils in forested areas emerged as hotspots exporting large amounts of TOC. These TOC fluxes were subject to considerable temporal variations caused by a combination of variable flow conditions and changing soil water TOC concentrations. Mineral riparian gley soils, on the other hand, were related to rather small TOC export rates and were characterized by relatively time-invariant TOC concentration profiles. Organic and mineral soils in RZs constitute a heterogeneous landscape mosaic that potentially controls much of the spatial variability of stream water TOC. We developed an empirical regression model based on the TWI to move beyond the plot scale and to predict spatially variable riparian TOC concentration profiles for RZs underlain by glacial till.

Place, publisher, year, edition, pages
2012. Vol. 9, no 10, 3901-3916 p.
Keyword [en]
catchment, chemical alteration, concentration (composition), Gleysol, groundwater flow, groundwater-surface water interaction, heterogeneity, numerical model, peat soil, regression analysis, riparian zone, soil profile, soil water, spatial variation, streamwater, till, total organic carbon, upscaling, water chemistry, water level, Sweden
National Category
Natural Sciences
URN: urn:nbn:se:uu:diva-186069DOI: 10.5194/bg-9-3901-2012ISI: 000310471800013OAI: oai:DiVA.org:uu-186069DiVA: diva2:572522
Available from: 2012-11-28 Created: 2012-11-27 Last updated: 2013-01-11Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Grabs, ThomasBishop, KevinSeibert, Jan
By organisation
In the same journal
Natural Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 230 hits
ReferencesLink to record
Permanent link

Direct link