[{"citation":{"chicago":"Fernandes, Taynara, Tom Shatwell, Martin Schultze, Chenxi Mi, Maria Determann, and Karsten Rinke. “How Efficient Are Pre-Dams as Reservoir Guardians? A Long-Term Study on Nutrient Retention.” <i>Water Research : A Journal of the International Water Association</i> 272 (2024). <a href=\"https://doi.org/10.1016/j.watres.2024.122864\">https://doi.org/10.1016/j.watres.2024.122864</a>.","din1505-2-1":"<span style=\"font-variant:small-caps;\">Fernandes, Taynara</span> ; <span style=\"font-variant:small-caps;\">Shatwell, Tom</span> ; <span style=\"font-variant:small-caps;\">Schultze, Martin</span> ; <span style=\"font-variant:small-caps;\">Mi, Chenxi</span> ; <span style=\"font-variant:small-caps;\">Determann, Maria</span> ; <span style=\"font-variant:small-caps;\">Rinke, Karsten</span>: How efficient are pre-dams as reservoir guardians? A long-term study on nutrient retention. In: <i>Water research : a journal of the International Water Association</i> Bd. 272. Amsterdam [u.a.], Elsevier BV (2024)","bjps":"<b>Fernandes T <i>et al.</i></b> (2024) How Efficient Are Pre-Dams as Reservoir Guardians? A Long-Term Study on Nutrient Retention. <i>Water research : a journal of the International Water Association</i> <b>272</b>.","van":"Fernandes T, Shatwell T, Schultze M, Mi C, Determann M, Rinke K. How efficient are pre-dams as reservoir guardians? A long-term study on nutrient retention. Water research : a journal of the International Water Association. 2024;272.","ama":"Fernandes T, Shatwell T, Schultze M, Mi C, Determann M, Rinke K. How efficient are pre-dams as reservoir guardians? A long-term study on nutrient retention. <i>Water research : a journal of the International Water Association</i>. 2024;272. doi:<a href=\"https://doi.org/10.1016/j.watres.2024.122864\">10.1016/j.watres.2024.122864</a>","ieee":"T. Fernandes, T. Shatwell, M. Schultze, C. Mi, M. Determann, and K. Rinke, “How efficient are pre-dams as reservoir guardians? A long-term study on nutrient retention,” <i>Water research : a journal of the International Water Association</i>, vol. 272, Art. no. 122864, 2024, doi: <a href=\"https://doi.org/10.1016/j.watres.2024.122864\">10.1016/j.watres.2024.122864</a>.","chicago-de":"Fernandes, Taynara, Tom Shatwell, Martin Schultze, Chenxi Mi, Maria Determann und Karsten Rinke. 2024. How efficient are pre-dams as reservoir guardians? A long-term study on nutrient retention. <i>Water research : a journal of the International Water Association</i> 272. doi:<a href=\"https://doi.org/10.1016/j.watres.2024.122864\">10.1016/j.watres.2024.122864</a>, .","ufg":"<b>Fernandes, Taynara u. a.</b>: How efficient are pre-dams as reservoir guardians? A long-term study on nutrient retention, in: <i>Water research : a journal of the International Water Association</i> 272 (2024).","mla":"Fernandes, Taynara, et al. “How Efficient Are Pre-Dams as Reservoir Guardians? A Long-Term Study on Nutrient Retention.” <i>Water Research : A Journal of the International Water Association</i>, vol. 272, 122864, 2024, <a href=\"https://doi.org/10.1016/j.watres.2024.122864\">https://doi.org/10.1016/j.watres.2024.122864</a>.","apa":"Fernandes, T., Shatwell, T., Schultze, M., Mi, C., Determann, M., &#38; Rinke, K. (2024). How efficient are pre-dams as reservoir guardians? A long-term study on nutrient retention. <i>Water Research : A Journal of the International Water Association</i>, <i>272</i>, Article 122864. <a href=\"https://doi.org/10.1016/j.watres.2024.122864\">https://doi.org/10.1016/j.watres.2024.122864</a>","short":"T. Fernandes, T. Shatwell, M. Schultze, C. Mi, M. Determann, K. Rinke, Water Research : A Journal of the International Water Association 272 (2024).","havard":"T. Fernandes, T. Shatwell, M. Schultze, C. Mi, M. Determann, K. Rinke, How efficient are pre-dams as reservoir guardians? A long-term study on nutrient retention, Water Research : A Journal of the International Water Association. 272 (2024)."},"place":"Amsterdam [u.a.]","publication_status":"published","volume":272,"pmid":"1","date_created":"2025-04-24T06:36:16Z","language":[{"iso":"eng"}],"intvolume":"       272","author":[{"last_name":"Fernandes","full_name":"Fernandes, Taynara","first_name":"Taynara"},{"orcid":"0000-0002-4520-7916","first_name":"Tom","full_name":"Shatwell, Tom","last_name":"Shatwell","id":"86424"},{"full_name":"Schultze, Martin","last_name":"Schultze","first_name":"Martin"},{"last_name":"Mi","full_name":"Mi, Chenxi","first_name":"Chenxi"},{"first_name":"Maria","last_name":"Determann","full_name":"Determann, Maria"},{"first_name":"Karsten","full_name":"Rinke, Karsten","last_name":"Rinke"}],"isi":"1","publication_identifier":{"issn":["0043-1354"],"eissn":["1879-2448"]},"title":"How efficient are pre-dams as reservoir guardians? A long-term study on nutrient retention","publication":"Water research : a journal of the International Water Association","article_number":"122864","_id":"12854","publisher":"Elsevier BV","type":"scientific_journal_article","doi":"10.1016/j.watres.2024.122864","date_updated":"2025-06-24T14:12:42Z","external_id":{"isi":["001377992000001"],"pmid":["39647312"]},"status":"public","user_id":"83781","year":"2024","department":[{"_id":"DEP8000"},{"_id":"DEP8022"}],"abstract":[{"text":"Assessing nutrient loading and processing is crucial for water quality management in lakes and reservoirs. Quantifying and reducing external nutrient inputs in these systems remains a significant challenge. The difficulty arises from low monitoring frequencies of the highly dynamic external inputs and the limited availability of measures to reduce diffuse source loading. One option for the latter is the use of pre-dams, i.e. small impoundments at the inflow points into reservoirs, designed to retain nutrients by algal uptake and sedimentation. This study analyzes long-term (ranging from 8 to 22 years) nutrient and discharge time series for nine German pre-dams to assess their retention capacity. For that, we (i) quantified nutrient loading using four different mathematical methods, (ii) derived their retention efficiencies, and (iii) identified environmental factors determining the retention of nitrogen (N), phosphorus (P), and silica (Si). We show that retention of soluble reactive phosphorus (SRP) (43.6 %) and total phosphorus (TP) (39.9 %) is far higher than for nitrate (NO3) (15.3 %) and Si (15.9 %). The retention efficiency for SRP and TP was higher during the warm seasons because of higher algal nutrient uptake and thus higher nutrient sedimentation. Mixed effects models documented a significant positive effect of the pre-dams' hydraulic residence time (HRT) on retention efficiency. Pre-dams provide substantial service in retaining nutrients and help to protect downstream waterbodies from nutrient inputs. They provide effective measures for trapping nutrients including those originating from non-point sources.","lang":"eng"}],"keyword":["Nutrient load calculation","Phosphorus","Nitrogen","Silica","Retention efficiency","Lakes"]},{"title":"The locally resolved filtration process for removal of phosphorus and micropollutants with GAC","citation":{"ieee":"U. Telgmann, E. Borowska, J. Felmeden, and F.-B. Frechen, “The locally resolved filtration process for removal of phosphorus and micropollutants with GAC,” <i>Journal of Water Process Engineering</i>, vol. 35, no. 101236, 2020, doi: <a href=\"https://doi.org/10.1016/j.jwpe.2020.101236\">10.1016/j.jwpe.2020.101236</a>.","van":"Telgmann U, Borowska E, Felmeden J, Frechen FB. The locally resolved filtration process for removal of phosphorus and micropollutants with GAC. Journal of Water Process Engineering. 2020;35(101236).","ama":"Telgmann U, Borowska E, Felmeden J, Frechen FB. The locally resolved filtration process for removal of phosphorus and micropollutants with GAC. <i>Journal of Water Process Engineering</i>. 2020;35(101236). doi:<a href=\"https://doi.org/10.1016/j.jwpe.2020.101236\">10.1016/j.jwpe.2020.101236</a>","bjps":"<b>Telgmann U <i>et al.</i></b> (2020) The Locally Resolved Filtration Process for Removal of Phosphorus and Micropollutants with GAC. <i>Journal of Water Process Engineering</i> <b>35</b>.","din1505-2-1":"<span style=\"font-variant:small-caps;\">Telgmann, Ursula</span> ; <span style=\"font-variant:small-caps;\">Borowska, Ewa</span> ; <span style=\"font-variant:small-caps;\">Felmeden, Jörg</span> ; <span style=\"font-variant:small-caps;\">Frechen, Franz-Bernd</span>: The locally resolved filtration process for removal of phosphorus and micropollutants with GAC. In: <i>Journal of Water Process Engineering</i> Bd. 35. Amsterdam [u.a.], Elsevier (2020), Nr. 101236","chicago":"Telgmann, Ursula, Ewa Borowska, Jörg Felmeden, and Franz-Bernd Frechen. “The Locally Resolved Filtration Process for Removal of Phosphorus and Micropollutants with GAC.” <i>Journal of Water Process Engineering</i> 35, no. 101236 (2020). <a href=\"https://doi.org/10.1016/j.jwpe.2020.101236\">https://doi.org/10.1016/j.jwpe.2020.101236</a>.","havard":"U. Telgmann, E. Borowska, J. Felmeden, F.-B. Frechen, The locally resolved filtration process for removal of phosphorus and micropollutants with GAC, Journal of Water Process Engineering. 35 (2020).","short":"U. Telgmann, E. Borowska, J. Felmeden, F.-B. Frechen, Journal of Water Process Engineering 35 (2020).","mla":"Telgmann, Ursula, et al. “The Locally Resolved Filtration Process for Removal of Phosphorus and Micropollutants with GAC.” <i>Journal of Water Process Engineering</i>, vol. 35, no. 101236, 2020, <a href=\"https://doi.org/10.1016/j.jwpe.2020.101236\">https://doi.org/10.1016/j.jwpe.2020.101236</a>.","apa":"Telgmann, U., Borowska, E., Felmeden, J., &#38; Frechen, F.-B. (2020). The locally resolved filtration process for removal of phosphorus and micropollutants with GAC. <i>Journal of Water Process Engineering</i>, <i>35</i>(101236). <a href=\"https://doi.org/10.1016/j.jwpe.2020.101236\">https://doi.org/10.1016/j.jwpe.2020.101236</a>","ufg":"<b>Telgmann, Ursula u. a.</b>: The locally resolved filtration process for removal of phosphorus and micropollutants with GAC, in: <i>Journal of Water Process Engineering</i> 35 (2020), H. 101236.","chicago-de":"Telgmann, Ursula, Ewa Borowska, Jörg Felmeden und Franz-Bernd Frechen. 2020. The locally resolved filtration process for removal of phosphorus and micropollutants with GAC. <i>Journal of Water Process Engineering</i> 35, Nr. 101236. doi:<a href=\"https://doi.org/10.1016/j.jwpe.2020.101236\">10.1016/j.jwpe.2020.101236</a>, ."},"place":"Amsterdam [u.a.]","publication_status":"published","volume":35,"language":[{"iso":"eng"}],"date_created":"2023-06-24T18:25:54Z","author":[{"first_name":"Ursula","last_name":"Telgmann","full_name":"Telgmann, Ursula"},{"last_name":"Borowska","full_name":"Borowska, Ewa","first_name":"Ewa"},{"full_name":"Felmeden, Jörg","last_name":"Felmeden","id":"81335","first_name":"Jörg"},{"last_name":"Frechen","full_name":"Frechen, Franz-Bernd","first_name":"Franz-Bernd"}],"intvolume":"        35","publication_identifier":{"issn":["2214-7144"]},"_id":"10004","publication":"Journal of Water Process Engineering","date_updated":"2023-06-27T09:01:24Z","doi":"10.1016/j.jwpe.2020.101236","issue":"101236","publisher":"Elsevier","type":"scientific_journal_article","abstract":[{"text":"Flocculation filtration in deep bed is one of the techniques to achieve advanced phosphorus removal. In addition to particle retention and phosphorus removal, granular activated carbon may serve as a filtration medium but also as an adsorption bed for micropollutants. The aim of the study was to investigate the simultaneous elimination of total phosphorus (TP) and selected micropollutants. In the first part of the study the target phosphorus threshold of 0.2 mg/L TP in the filtrate was achieved in a dual-bed media filter with anthracite and sand up to filter velocities of 16 m/h. By using a detailed sampling protocol and headloss curves, the influence of different operation modes on retention could be identified. Afterwards, the filter media were replaced by three types of GAC. In all filter beds substantial differences were found in the mode and efficiency of particle retention. This led to different filter run times, which is one of the main parameters for efficient and economical filter operation. Specific curves were generated for the different bed materials showing the dependency of filter run time on the specific load of suspended solids. Elimination of micropollutants in a GAC 4 × 8 mesh filter bed was low due to coarse grains and low empty bed contact time (EBCT). The application of GAC 8 × 14 mesh filter bed resulted in high elimination of most micropollutants. These results can be applied when choosing filter bed material. This may involve a compromise between filter run time and adsorption of micropollutants.","lang":"eng"}],"extern":"1","keyword":["Water treatment","Phosphorus","Micropollutants","Filter operation","Local headloss profiles"],"status":"public","year":"2020","user_id":"15514","department":[{"_id":"DEP3021"}]},{"status":"public","department":[{"_id":"DEP8022"}],"year":"2013","user_id":"83781","page":"82-90","abstract":[{"text":"When severely degraded fens are rewetted, they often become shallow lakes with an average water depth of less than 1 m. The additional high nutrient availability in highly decomposed peat soils of these newly formed ecosystems favours the fast establishment of a small number of helophytes while the return of lost target species like low sedges and brown mosses could be delayed for decades. We hypothesise that the phosphorus (P) uptake of the newly developed vegetation substantially influences the P cycle in rewetted fens. Therefore, we investigated how much of the P released in upper degraded peat soils is pumped across the redox-interface between the soil and surface water (=‘P barrier’) during the growing season (∼150 days) by six helophytes (Phragmites australis, Typha latifolia, Glyceria maxima, Carex acutiformis, Carex riparia, and Phalaris arundinacea) in five rewetted fens. We then assessed how this would affect the different plant-available P fractions in the rooted degraded peat layers. The highest P uptake during the growing season (duration 150 days from May to September) was recorded for T. latifolia and G. maxima (3.0 and 2.8 g m−2, respectively). Overall, the P uptake was in the range of the P mobilisation rates we measured in highly decomposed peat soils (range: 0.8–15.6 g P m−2, n = 30), but four to 10-fold higher than diffusive net P fluxes at the interface between soil and surface water. Accordingly, helophytes are able to compensate for the high P mobilisation in degraded peat soils during the growing season, by incorporating this P into biomass. On the other hand a large part of the plant-P stock is released after die back through leaching and mineralisation, which increases the P load of these newly formed shallow lakes and possibly also of adjacent water courses. We estimated that it would still take 20–50 years to exhaust the large pool of plant-available P in highly decomposed peat soils if aboveground biomass was removed. Without any further management apart from fen rewetting it is unlikely that the fens will return to low nutrient levels within a human life time.","lang":"eng"}],"keyword":["Leaching","Phosphorus retention","Phragmites australis","Top soil removal","Redox interface","Rewetting"],"extern":"1","publisher":"Elsevier BV","type":"scientific_journal_article","quality_controlled":"1","date_updated":"2024-12-09T09:06:10Z","doi":"10.1016/j.ecoleng.2013.10.003","issue":"5","publication":"Ecological Engineering","_id":"12247","language":[{"iso":"eng"}],"date_created":"2024-12-08T20:42:18Z","publication_status":"published","volume":66,"place":"Amsterdam","citation":{"din1505-2-1":"<span style=\"font-variant:small-caps;\">Zak, Dominik</span> ; <span style=\"font-variant:small-caps;\">Gelbrecht, Jörg</span> ; <span style=\"font-variant:small-caps;\">Zerbe, Stefan</span> ; <span style=\"font-variant:small-caps;\">Shatwell, Tom</span> ; <span style=\"font-variant:small-caps;\">Barth, Martin</span> ; <span style=\"font-variant:small-caps;\">Cabezas, Alvaro</span> ; <span style=\"font-variant:small-caps;\">Steffenhagen, Peggy</span>: How helophytes influence the phosphorus cycle in degraded inundated peat soils – Implications for fen restoration. In: <i>Ecological Engineering</i> Bd. 66. Amsterdam, Elsevier BV (2013), Nr. 5, S. 82–90","mla":"Zak, Dominik, et al. “How Helophytes Influence the Phosphorus Cycle in Degraded Inundated Peat Soils – Implications for Fen Restoration.” <i>Ecological Engineering</i>, vol. 66, no. 5, 2013, pp. 82–90, <a href=\"https://doi.org/10.1016/j.ecoleng.2013.10.003\">https://doi.org/10.1016/j.ecoleng.2013.10.003</a>.","apa":"Zak, D., Gelbrecht, J., Zerbe, S., Shatwell, T., Barth, M., Cabezas, A., &#38; Steffenhagen, P. (2013). How helophytes influence the phosphorus cycle in degraded inundated peat soils – Implications for fen restoration. <i>Ecological Engineering</i>, <i>66</i>(5), 82–90. <a href=\"https://doi.org/10.1016/j.ecoleng.2013.10.003\">https://doi.org/10.1016/j.ecoleng.2013.10.003</a>","short":"D. Zak, J. Gelbrecht, S. Zerbe, T. Shatwell, M. Barth, A. Cabezas, P. Steffenhagen, Ecological Engineering 66 (2013) 82–90.","bjps":"<b>Zak D <i>et al.</i></b> (2013) How Helophytes Influence the Phosphorus Cycle in Degraded Inundated Peat Soils – Implications for Fen Restoration. <i>Ecological Engineering</i> <b>66</b>, 82–90.","chicago-de":"Zak, Dominik, Jörg Gelbrecht, Stefan Zerbe, Tom Shatwell, Martin Barth, Alvaro Cabezas und Peggy Steffenhagen. 2013. How helophytes influence the phosphorus cycle in degraded inundated peat soils – Implications for fen restoration. <i>Ecological Engineering</i> 66, Nr. 5: 82–90. doi:<a href=\"https://doi.org/10.1016/j.ecoleng.2013.10.003\">10.1016/j.ecoleng.2013.10.003</a>, .","chicago":"Zak, Dominik, Jörg Gelbrecht, Stefan Zerbe, Tom Shatwell, Martin Barth, Alvaro Cabezas, and Peggy Steffenhagen. “How Helophytes Influence the Phosphorus Cycle in Degraded Inundated Peat Soils – Implications for Fen Restoration.” <i>Ecological Engineering</i> 66, no. 5 (2013): 82–90. <a href=\"https://doi.org/10.1016/j.ecoleng.2013.10.003\">https://doi.org/10.1016/j.ecoleng.2013.10.003</a>.","ufg":"<b>Zak, Dominik u. a.</b>: How helophytes influence the phosphorus cycle in degraded inundated peat soils – Implications for fen restoration, in: <i>Ecological Engineering</i> 66 (2013), H. 5,  S. 82–90.","ieee":"D. Zak <i>et al.</i>, “How helophytes influence the phosphorus cycle in degraded inundated peat soils – Implications for fen restoration,” <i>Ecological Engineering</i>, vol. 66, no. 5, pp. 82–90, 2013, doi: <a href=\"https://doi.org/10.1016/j.ecoleng.2013.10.003\">10.1016/j.ecoleng.2013.10.003</a>.","havard":"D. Zak, J. Gelbrecht, S. Zerbe, T. Shatwell, M. Barth, A. Cabezas, P. Steffenhagen, How helophytes influence the phosphorus cycle in degraded inundated peat soils – Implications for fen restoration, Ecological Engineering. 66 (2013) 82–90.","van":"Zak D, Gelbrecht J, Zerbe S, Shatwell T, Barth M, Cabezas A, et al. How helophytes influence the phosphorus cycle in degraded inundated peat soils – Implications for fen restoration. Ecological Engineering. 2013;66(5):82–90.","ama":"Zak D, Gelbrecht J, Zerbe S, et al. How helophytes influence the phosphorus cycle in degraded inundated peat soils – Implications for fen restoration. <i>Ecological Engineering</i>. 2013;66(5):82-90. doi:<a href=\"https://doi.org/10.1016/j.ecoleng.2013.10.003\">10.1016/j.ecoleng.2013.10.003</a>"},"publication_identifier":{"issn":["0925-8574"]},"intvolume":"        66","author":[{"first_name":"Dominik","last_name":"Zak","full_name":"Zak, Dominik"},{"full_name":"Gelbrecht, Jörg","last_name":"Gelbrecht","first_name":"Jörg"},{"last_name":"Zerbe","full_name":"Zerbe, Stefan","first_name":"Stefan"},{"orcid":"0000-0002-4520-7916","last_name":"Shatwell","id":"86424","full_name":"Shatwell, Tom","first_name":"Tom"},{"last_name":"Barth","full_name":"Barth, Martin","first_name":"Martin"},{"full_name":"Cabezas, Alvaro","last_name":"Cabezas","first_name":"Alvaro"},{"last_name":"Steffenhagen","full_name":"Steffenhagen, Peggy","first_name":"Peggy"}],"title":"How helophytes influence the phosphorus cycle in degraded inundated peat soils – Implications for fen restoration","main_file_link":[{"url":"https://doi.org/10.1016/j.ecoleng.2013.10.003"}]}]