Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.1007/s10021-015-9878-5
Titel (primär) Upscaling nitrogen removal capacity from local hotspots to low stream orders’ drainage basins
Autor Pinay, G.; Peiffer, S.; De Dreuzy, J.-R.; Krause, S.; Hannah, D.M.; Fleckenstein, J.H.; Sebilo, M.; Bishop, K.; Hubert-Moy, L.
Quelle Ecosystems
Erscheinungsjahr 2015
Department HDG
Band/Volume 18
Heft 6
Seite von 1101
Seite bis 1120
Sprache englisch
Keywords denitrification – biogeochemical hotspot – upscaling – residence time distribution – Damköhler ratio – diffuse pollution control
UFZ Querschnittsthemen RU2;
Abstract Denitrification is the main process removing nitrate in river drainage basins and buffer input from agricultural land and limits aquatic ecosystem pollution. However, the identification of denitrification hotspots (for example, riparian zones), their role in a landscape context and the evolution of their overall removal capacity at the drainage basin scale are still challenging. The main approaches used (that is, mass balance method, denitrification proxies, and potential wetted areas) suffer from methodological drawbacks. We review these approaches and the key frameworks that have been proposed to date to formalize the understanding of the mechanisms driving denitrification: (i) Diffusion versus advection pathways of nitrate transfer, (ii) the biogeochemical hotspot, and (iii) the Damköhler ratio. Based on these frameworks, we propose to use high-resolution mapping of catchment topography and landscape pattern to define both potential denitrification sites and the dynamic hydrologic modeling at a similar spatial scale (<10 km2). It would allow the quantification of cumulative denitrification activity at the small catchment scale, using spatially distributed Damköhler and Peclet numbers and biogeochemical proxies. Integration of existing frameworks with new tools and methods offers the potential for significant breakthroughs in the quantification and modeling of denitrification in small drainage basins. This can provide a basis for improved protection and restoration of surface water and groundwater quality.
dauerhafte UFZ-Verlinkung
Pinay, G., Peiffer, S., De Dreuzy, J.-R., Krause, S., Hannah, D.M., Fleckenstein, J.H., Sebilo, M., Bishop, K., Hubert-Moy, L. (2015):
Upscaling nitrogen removal capacity from local hotspots to low stream orders’ drainage basins
Ecosystems 18 (6), 1101 - 1120 10.1007/s10021-015-9878-5