Catchments as reactors: a comprehensive approach for water fluxes and solute turnover

Grathwohl, Peter; Hermann, R.; Wöhling, Thomas; Osenbrück, Karsten; Schwientek, Marc; Gayler, Sebastian; Wollschläger, Ute; Selle, Benny; Pause, Marion; Delfs, Jens-Olaf; Grzeschik, Matthias; Weller, Ulrich; Ivanov, Martin; Cirpka, Olaf A.; Maier, Uli; Wulfmeyer, Volker; Streck, Thilo; Attinger, Sabine; Dietrich, Peter; Fleckenstein, Jan H.; Kolditz, Olaf; Vogel, Hans‐Jörg

doi:10.1007/s12665-013-2281-7

Cited by 78 publications

(45 citation statements)

References 85 publications

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“…However, large catchments include both diffuse and domestic or industrial point-source contributions and possibly various landscape units. Thus, the water-quality signal measured at the outlet integrates several transfer mechanisms contributing to emissions in the river network, as well as in-stream processes (Grathwohl et al, 2013). Therefore, it is difficult to decipher the diffuse contributions of different landscape units from point-source contributions and instream transformations (Bishop et al, 2008;Temnerud et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Carbon and nutrient export regimes from headwater catchments to downstream reaches

et al. 2017

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Abstract. Excessive amounts of nutrients and dissolved organic matter in freshwater bodies affect aquatic ecosystems. In this study, the spatial and temporal variability in nitrate (NO − 3 ), dissolved organic carbon (DOC) and soluble reactive phosphorus (SRP) was analyzed in the Selke (Germany) river continuum from three headwaters draining 1-3 km 2 catchments to two downstream reaches representing spatially integrated signals from 184-456 km 2 catchments. Three headwater catchments were selected as archetypes of the main landscape units (land use × lithology) present in the Selke catchment. Export regimes in headwater catchments were interpreted in terms of NO − 3 , DOC and SRP land-to-stream transfer processes. Headwater signals were subtracted from downstream signals, with the differences interpreted in terms of in-stream processes and contributions from point sources. The seasonal dynamics for NO − 3 were opposite those of DOC and SRP in all three headwater catchments, and spatial differences also showed NO − 3 contrasting with DOC and SRP. These dynamics were interpreted as the result of the interplay of hydrological and biogeochemical processes, for which riparian zones were hypothesized to play a determining role. In the two downstream reaches, NO − 3 was transported almost conservatively, whereas DOC was consumed and produced in the upper and lower river sections, respectively. The natural export regime of SRP in the three headwater catchments mimicked a point-source signal (high SRP during summer low flow), which may lead to overestimation of domestic contributions in the downstream reaches. Monitoring the river continuum from headwaters to downstream reaches proved effective to jointly investigate land-to-stream and instream transport, and transformation processes.

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Section: Introductionmentioning

confidence: 99%

Carbon and nutrient export regimes from headwater catchments to downstream reaches

et al. 2017

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“…The German-Chinese cooperation in water science and technology can benefit from international projects for water resources management in hydrologically and climate sensitive regions of the world such as the International Water Research Alliance Saxony (IWAS) (Kalbus et al 2012) and Water and Earth System Science (WESS) projects (Grathwohl et al 2013), and other joint projects as well. With increasing challenges in the 21st century, there are new tasks and opportunities in water sciences for the Germany-China cooperation described by the following aspects.…”

Section: New Opportunities and Challenges Of German-chinese Cooperatimentioning

confidence: 99%

Challenges and opportunities of German-Chinese cooperation in water science and technology

et al. 2015

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“…Recent Thematic Issues in EES were dealing with Integrated Water Resources Management under different hydrological, climatic and socio-economic conditions (Kalbus et al 2012;Grathwohl et al 2013;Seegert et al 2014) including topics like progress in monitoring and modeling concepts (Beinhorn et al 2005;Beyer et al 2006;Kalbacher et al 2012;Rink et al 2012). The protection of aquatic ecosystems and the security of drinking water provision are becoming an increasing economic challenge in water management.…”

Section: Introductionmentioning

confidence: 99%

Thematic Issue: Water of the Taihu Lake

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et al. 2015

Environ Earth Sci

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Catchments as reactors: a comprehensive approach for water fluxes and solute turnover

Cited by 78 publications

References 85 publications

Carbon and nutrient export regimes from headwater catchments to downstream reaches

Carbon and nutrient export regimes from headwater catchments to downstream reaches

Challenges and opportunities of German-Chinese cooperation in water science and technology

Thematic Issue: Water of the Taihu Lake

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