Publication Details

Reference Category Book chapters
DOI / URL
Title (Primary) Modelling the fate of nitrate in a lowland catchment system
Title (Secondary) International symposium on dynamics and biogeochemistry of river corridors and wetlands (Proceedings of symposium S4 held during the Seventh IAHS Scientific Assembly at Foz do Iguaçu, Brazil, April 2005)
Author Wriedt, G.; Spindler, J.; Geistlinger, H.; Rode, M.
Publisher Heathwaite, A.L.; Webb, B.; Rosenberry, D.; Weaver, D.; Hayashi, M.
Journal IAHS Publication
Year 2005
Department BOPHY; HYMOD
Volume 294
Page From 46
Page To 54
Language englisch
Keywords groundwater; lowland catchment; modelling; nitrate; nitrogen; reactive transport; soil
Abstract

Biogeochemical transformations and hydraulic processes in soil and groundwater can moderate nitrate loads in surface waters compared to nitrogen inputs to soil. A modelling approach was developed based on the loose coupling of a soil nitrogen model with a groundwater flow and a multi-species reactive groundwater-transport model. This approach combines transport time with availability of reaction partners and nitrate turnover. A case study was conducted in a small lowland catchment (Schaugraben, 20 km2) close to Osterburg in the north of Saxony-Anhalt, Germany, and demonstrated the spatial heterogeneity of nitrate loads and concentrations resulting from the spatial distribution of nitrate inputs, the arrangement of input areas to the channel network, and the consumption of reactive substances in the aquifer. An extension of this approach aims to describe turnover processes at the groundwater-surface water interface in order to close the gap between groundwater exfiltration and catchment outlet.

Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=3910
Wriedt, G., Spindler, J., Geistlinger, H., Rode, M. (2005):
Modelling the fate of nitrate in a lowland catchment system
In: Heathwaite, A.L., Webb, B., Rosenberry, D., Weaver, D., Hayashi, M. (eds.)
International symposium on dynamics and biogeochemistry of river corridors and wetlands (Proceedings of symposium S4 held during the Seventh IAHS Scientific Assembly at Foz do Iguaçu, Brazil, April 2005)
IAHS Publ. 294
International Association of Hydrological Sciences (IAHS), Wallingford, Oxfordshire, p. 46 - 54