[{"keyword":["Nutrient load calculation","Phosphorus","Nitrogen","Silica","Retention efficiency","Lakes"],"intvolume":"       272","publisher":"Elsevier BV","year":"2024","abstract":[{"lang":"eng","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."}],"type":"scientific_journal_article","department":[{"_id":"DEP8000"},{"_id":"DEP8022"}],"place":"Amsterdam [u.a.]","_id":"12854","date_created":"2025-04-24T06:36:16Z","date_updated":"2025-06-24T14:12:42Z","author":[{"first_name":"Taynara","last_name":"Fernandes","full_name":"Fernandes, Taynara"},{"first_name":"Tom","last_name":"Shatwell","id":"86424","full_name":"Shatwell, Tom","orcid":"0000-0002-4520-7916"},{"last_name":"Schultze","first_name":"Martin","full_name":"Schultze, Martin"},{"first_name":"Chenxi","last_name":"Mi","full_name":"Mi, Chenxi"},{"first_name":"Maria","last_name":"Determann","full_name":"Determann, Maria"},{"full_name":"Rinke, Karsten","last_name":"Rinke","first_name":"Karsten"}],"external_id":{"pmid":["39647312"],"isi":["001377992000001"]},"title":"How efficient are pre-dams as reservoir guardians? A long-term study on nutrient retention","isi":"1","user_id":"83781","publication_status":"published","article_number":"122864","publication":"Water research : a journal of the International Water Association","publication_identifier":{"issn":["0043-1354"],"eissn":["1879-2448"]},"pmid":"1","doi":"10.1016/j.watres.2024.122864","volume":272,"status":"public","language":[{"iso":"eng"}],"citation":{"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>.","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>.","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).","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>, .","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>","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).","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>.","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.","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)","short":"T. Fernandes, T. Shatwell, M. Schultze, C. Mi, M. Determann, K. Rinke, Water Research : A Journal of the International Water Association 272 (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>.","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>"}},{"place":"Hoboken, NJ","type":"scientific_journal_article","department":[{"_id":"DEP8022"}],"_id":"12228","date_created":"2024-12-08T19:59:08Z","quality_controlled":"1","keyword":["alpine lakes","extreme environments","ake-atmosphere interaction","lake ice","radiatively driven convection","winter limnology"],"intvolume":"        48","extern":"1","year":"2021","abstract":[{"text":"The Qinghai-Tibet Plateau possesses the largest alpine lake system, which plays a crucial role in the land-atmosphere interaction. We report first observations on the thermal and radiation regime under ice of the largest freshwater lake of the Plateau. The results reveal that freshwater lakes on the Tibetan Plateau fully mix under ice. Due to strong solar heating, water temperatures increase above the maximum density value 1–2 months before the ice break, forming stable thermal stratification with subsurface temperatures >6°C. The resulting heat flow from water to ice makes a crucial contribution to ice cover melt. After the ice breakup, the accumulated heat is released into the atmosphere during 1–2 days, increasing lake-atmosphere heat fluxes up to 500 W m−2. The direct biogeochemical consequences of the deep convective mixing are aeration of the deep lake waters and upward supply of nutrients to the upper photic layer.","lang":"eng"}],"issue":"14","publisher":"Wiley","publication_identifier":{"issn":["0094-8276"],"eissn":["1944-8007"]},"status":"public","doi":"10.1029/2021gl093429","volume":48,"language":[{"iso":"eng"}],"citation":{"bjps":"<b>Kirillin GB, Shatwell T and Wen L</b> (2021) Ice‐Covered Lakes of Tibetan Plateau as Solar Heat Collectors. <i>Geophysical Research Letters</i> <b>48</b>.","ama":"Kirillin GB, Shatwell T, Wen L. Ice‐Covered Lakes of Tibetan Plateau as Solar Heat Collectors. <i>Geophysical Research Letters</i>. 2021;48(14). doi:<a href=\"https://doi.org/10.1029/2021gl093429\">10.1029/2021gl093429</a>","havard":"G.B. Kirillin, T. Shatwell, L. Wen, Ice‐Covered Lakes of Tibetan Plateau as Solar Heat Collectors, Geophysical Research Letters. 48 (2021).","chicago":"Kirillin, Georgiy B, Tom Shatwell, and Lijuan Wen. “Ice‐Covered Lakes of Tibetan Plateau as Solar Heat Collectors.” <i>Geophysical Research Letters</i> 48, no. 14 (2021). <a href=\"https://doi.org/10.1029/2021gl093429\">https://doi.org/10.1029/2021gl093429</a>.","short":"G.B. Kirillin, T. Shatwell, L. Wen, Geophysical Research Letters 48 (2021).","din1505-2-1":"<span style=\"font-variant:small-caps;\">Kirillin, Georgiy B</span> ; <span style=\"font-variant:small-caps;\">Shatwell, Tom</span> ; <span style=\"font-variant:small-caps;\">Wen, Lijuan</span>: Ice‐Covered Lakes of Tibetan Plateau as Solar Heat Collectors. In: <i>Geophysical Research Letters</i> Bd. 48. Hoboken, NJ, Wiley (2021), Nr. 14","van":"Kirillin GB, Shatwell T, Wen L. Ice‐Covered Lakes of Tibetan Plateau as Solar Heat Collectors. Geophysical Research Letters. 2021;48(14).","chicago-de":"Kirillin, Georgiy B, Tom Shatwell und Lijuan Wen. 2021. Ice‐Covered Lakes of Tibetan Plateau as Solar Heat Collectors. <i>Geophysical Research Letters</i> 48, Nr. 14. doi:<a href=\"https://doi.org/10.1029/2021gl093429\">10.1029/2021gl093429</a>, .","apa":"Kirillin, G. B., Shatwell, T., &#38; Wen, L. (2021). Ice‐Covered Lakes of Tibetan Plateau as Solar Heat Collectors. <i>Geophysical Research Letters</i>, <i>48</i>(14). <a href=\"https://doi.org/10.1029/2021gl093429\">https://doi.org/10.1029/2021gl093429</a>","ufg":"<b>Kirillin, Georgiy B./Shatwell, Tom/Wen, Lijuan</b>: Ice‐Covered Lakes of Tibetan Plateau as Solar Heat Collectors, in: <i>Geophysical Research Letters</i> 48 (2021), H. 14.","ieee":"G. B. Kirillin, T. Shatwell, and L. Wen, “Ice‐Covered Lakes of Tibetan Plateau as Solar Heat Collectors,” <i>Geophysical Research Letters</i>, vol. 48, no. 14, 2021, doi: <a href=\"https://doi.org/10.1029/2021gl093429\">10.1029/2021gl093429</a>.","mla":"Kirillin, Georgiy B., et al. “Ice‐Covered Lakes of Tibetan Plateau as Solar Heat Collectors.” <i>Geophysical Research Letters</i>, vol. 48, no. 14, 2021, <a href=\"https://doi.org/10.1029/2021gl093429\">https://doi.org/10.1029/2021gl093429</a>."},"date_updated":"2024-12-11T08:34:29Z","author":[{"full_name":"Kirillin, Georgiy B","last_name":"Kirillin","first_name":"Georgiy B"},{"id":"86424","last_name":"Shatwell","first_name":"Tom","orcid":"0000-0002-4520-7916","full_name":"Shatwell, Tom"},{"full_name":"Wen, Lijuan","last_name":"Wen","first_name":"Lijuan"}],"title":"Ice‐Covered Lakes of Tibetan Plateau as Solar Heat Collectors","user_id":"83781","publication_status":"published","publication":"Geophysical Research Letters"}]