{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,5]],"date-time":"2025-11-05T21:08:02Z","timestamp":1762376882232,"version":"3.41.2"},"reference-count":46,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2021,2,13]],"date-time":"2021-02-13T00:00:00Z","timestamp":1613174400000},"content-version":"vor","delay-in-days":43,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100012659","name":"Foundation for Innovative Research Groups of the National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["51721006"],"award-info":[{"award-number":["51721006"]}],"id":[{"id":"10.13039\/501100012659","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Journal of Sensors"],"published-print":{"date-parts":[[2021,1]]},"abstract":"<jats:p>Endogenous contamination from the newly submerged sediment may have an impact on the water quality of the Danjiangkou Reservoir, the water source of the middle route of the South\u2010to\u2010North Water Diversion Project. In this study, in situ sediment samples were collected at different locations (Guojiashan (DJK1), Kongqueyuan (DJK2), Shijiagou (DJK3), Shiqiao Wharf (DJK4), and Songgang Wharf (DJK5) from the north to the south) of the Danjiangkou Reservoir and the upstream tributary using a columnar sediment sampler and statically cultured in laboratory, and the distribution and release of endogenous N and P from the sediment were investigated based on a double\u2010membrane diffusion model. The results showed that the P contents in the main reservoir and the upstream tributary followed the order of inorganic\u2009phosphorus\u2009(IP) &gt; organic\u2009phosphorus\u2009(OP) &gt; calcium \u2212 phosphorus\u2009(Ca \u2212 P) &gt; iron \u2212 phosphorus\u2009(Fe \u2212 P) &gt; labile\u2009phosphorus\u2009(LP). IP accounted for the largest proportion (47.10\u201059.70%) of total phosphorus (TP), while LP accounted for only a small proportion (0.10\u20100.90%) of TP. There is a significant difference in the spatial distribution of P at different sampling points, especially for the OP content (226.90\u2009mg\u00b7kg<jats:sup>-1<\/jats:sup>) with a coefficient of variation of 26.90%. The contents of different forms of P and NH<jats:sub>4<\/jats:sub><jats:sup>+<\/jats:sup>\u2010N decreased from the upstream tributary to the main reservoir, which was mainly attributed to the land use type. In the vertical distribution, the contents of different forms of P in DJK4 and DJK5 decreased with the increase of sediment depth. The contents of NH<jats:sub>4<\/jats:sub><jats:sup>+<\/jats:sup>\u2010N and PO<jats:sub>4<\/jats:sub><jats:sup>3-<\/jats:sup>\u2010P in the sediment interstitial water of DJK4 and DJK5 were higher than those in the overlying water. In addition, the contents of NH<jats:sub>4<\/jats:sub><jats:sup>+<\/jats:sup>\u2010N and PO<jats:sub>4<\/jats:sub><jats:sup>3-<\/jats:sup>\u2010P were higher in DJK5 than that in DJK4. The static culture experiments showed that N and P were mainly released from the sediment\u2010overlying water interface to the overlying water. The release rate of NH<jats:sub>4<\/jats:sub><jats:sup>+<\/jats:sup>\u2010N and PO<jats:sub>4<\/jats:sub><jats:sup>3-<\/jats:sup>\u2010P ranged from 13.08\u2009mg\u00b7(m<jats:sup>2<\/jats:sup>\u00b7d)<jats:sup>-1<\/jats:sup> to 21.39\u2009mg\u00b7(m<jats:sup>2<\/jats:sup>\u00b7d)<jats:sup>-1<\/jats:sup> and from 3.06\u2009mg\u00b7(m<jats:sup>2<\/jats:sup>\u00b7d)<jats:sup>-1<\/jats:sup> to 6.02\u2009mg\u00b7(m<jats:sup>2<\/jats:sup>\u00b7d)<jats:sup>-1<\/jats:sup>, and the release amount calculated based on the double\u2010membrane diffusion model was 1.17 \u00d7 10<jats:sup>3<\/jats:sup>\u2009t\u00b7a<jats:sup>-1<\/jats:sup> and 0.53 \u00d7 10<jats:sup>3<\/jats:sup>\u2009t\u00b7a<jats:sup>-1<\/jats:sup>, respectively. Thus, endogenous contamination from the newly submerged land is an important factor affecting the water quality of the Danjiangkou Reservoir.<\/jats:p>","DOI":"10.1155\/2021\/6610178","type":"journal-article","created":{"date-parts":[[2021,2,14]],"date-time":"2021-02-14T05:05:19Z","timestamp":1613279119000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["The Release of Endogenous Nitrogen and Phosphorus in the Danjiangkou Reservoir: A Double\u2010Membrane Diffusion Model Analysis"],"prefix":"10.1155","volume":"2021","author":[{"given":"Zhiqi","family":"Wang","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hongxin","family":"Ren","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhaolong","family":"Ma","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhihong","family":"Yao","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Pengfei","family":"Duan","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0195-2367","authenticated-orcid":false,"given":"Guodong","family":"Ji","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2021,2,13]]},"reference":[{"key":"e_1_2_8_1_2","first-page":"1523","article-title":"Process and mechanism of the effects of lake sediment dredging on endogenous release","volume":"3","author":"Fan C. 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