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Quantifying in-stream retention of nitrate at catchment scales using a practical mass balance approach
- As field data on in-stream nitrate retention is scarce at catchment scales, this study aimed at quantifying net retention of nitrate within the entire river network of a fourth-order stream. For this purpose, a practical mass balance approach combined with a Lagrangian sampling scheme was applied and seasonally repeated to estimate daily in-stream net retention of nitrate for a 17.4 km long, agriculturally influenced, segment of the Steinlach River in southwestern Germany. This river segment represents approximately 70 % of the length of the main stem and about 32 % of the streambed area of the entire river network. Sampling days in spring and summer were biogeochemically more active than in autumn and winter. Results obtained for the main stem of Steinlach River were subsequently extrapolated to the stream network in the catchment. It was demonstrated that, for baseflow conditions in spring and summer, in-stream nitrate retention could sum up to a relevant term of the catchment’s nitrogen balance if the entire stream network wasAs field data on in-stream nitrate retention is scarce at catchment scales, this study aimed at quantifying net retention of nitrate within the entire river network of a fourth-order stream. For this purpose, a practical mass balance approach combined with a Lagrangian sampling scheme was applied and seasonally repeated to estimate daily in-stream net retention of nitrate for a 17.4 km long, agriculturally influenced, segment of the Steinlach River in southwestern Germany. This river segment represents approximately 70 % of the length of the main stem and about 32 % of the streambed area of the entire river network. Sampling days in spring and summer were biogeochemically more active than in autumn and winter. Results obtained for the main stem of Steinlach River were subsequently extrapolated to the stream network in the catchment. It was demonstrated that, for baseflow conditions in spring and summer, in-stream nitrate retention could sum up to a relevant term of the catchment’s nitrogen balance if the entire stream network was considered.…
| Verfasserangaben: | Marc Schwientek, Benny Selle |
|---|---|
| DOI: | https://doi.org/10.1007/s10661-016-5097-6 |
| ISSN: | 0167-6369 |
| ISSN: | 1573-2959 |
| Pubmed ID: | https://pubmed.ncbi.nlm.nih.gov/26801154 |
| Titel des übergeordneten Werks (Englisch): | Environmental monitoring and assessment : an international journal devoted to progress in the use of monitoring data in assessing environmental risks to man and the environment |
| Verlag: | Springer |
| Verlagsort: | Dordrecht |
| Publikationstyp: | Wissenschaftlicher Artikel |
| Sprache: | Englisch |
| Jahr der Erstveröffentlichung: | 2016 |
| Erscheinungsjahr: | 2016 |
| Datum der Freischaltung: | 22.03.2020 |
| Freies Schlagwort / Tag: | Catchment scale; In-stream processes; Mass balance approach; Nitrate retention; Stream network |
| Band: | 188 |
| Seitenanzahl: | 12 |
| Erste Seite: | 373 |
| Letzte Seite: | 386 |
| Fördernde Institution: | Ministry of Science, Research and Arts of Baden-Wurttemberg [AZ Zu 33-721.3-2]; Helmholtz Center for Environmental Research, Leipzig (UFZ); EU FP7 Collaborative Project GLOBAQUA [603629] |
| Organisationseinheiten: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Geowissenschaften |
| Peer Review: | Referiert |
| Name der Einrichtung zum Zeitpunkt der Publikation: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Erd- und Umweltwissenschaften |
