{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,2]],"date-time":"2026-07-02T14:13:44Z","timestamp":1783001624968,"version":"3.54.5"},"reference-count":0,"publisher":"IWA Publishing","issue":"4","content-domain":{"domain":["iwaponline.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2009,4,1]]},"abstract":"<jats:p>Phosphorus (P) release rates from bottom sediments are high (20.6\u2009mg\/m2\/day) in Dal Lake (India), a polymictic hyper-eutrophic lake. These gross release rates occur over a period of 72 days during summer only. Likewise, a net internal load of 11.3 tons was obtained from mass balance estimates. Significant proportion i.e. \u223c 80% of 287.3\u2009tons\/yr of nitrate nitrogen (NO3-N) load is either eliminated by denitrification or gets entrapped for a short period in high macrophyte biomass of 3.2\u2009kg\/m2 f.w., which eventually get decomposed and nitrogen (N) is released back. These processes result in low lake water NO3-N concentrations which potentially influence sediment phosphorus (P) release. Especially, nitrate nitrogen (NO3-N) &amp;lt;500\u2009\u03bcg\/L in the lake waters were associated with high P concentrations. Phosphorus was also observed to increase significantly in relation to temperature and pH, and it seems likely that release of phosphorus and ammonical nitrogen (NH4-N) depend on decomposition of rich reserves of organic matter (893 tons d.w. in superficial 10-cm bottom sediment layer). Lake P concentrations were significantly predicted by a multivariate regression model developed for the lake. This study describes significance of various lake water variables in relation to P-release from bottom sediments.<\/jats:p>","DOI":"10.2166\/wst.2009.445","type":"journal-article","created":{"date-parts":[[2009,8,21]],"date-time":"2009-08-21T14:56:57Z","timestamp":1250866617000},"page":"1013-1023","update-policy":"https:\/\/doi.org\/10.2166\/iwapcrossmarkpolicypage","source":"Crossref","is-referenced-by-count":26,"title":["Factors influencing release of phosphorus from sediments in a high productive polymictic lake system"],"prefix":"10.2166","volume":"60","author":[{"given":"S. U.","family":"Solim","sequence":"first","affiliation":[{"name":"Research and Monitoring Division, Lakes and Waterways Development Authority, Nishat, Srinagar Jammu and Kashmir, India E-mail: solim_saba@yahoo.co.in"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"A.","family":"Wanganeo","sequence":"first","affiliation":[{"name":"Department of Limnology, Barkatuallah University, Bhopal Madhya Pradesh, India E-mail: wanganeo_a@yahoo.com"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"945","container-title":["Water Science and Technology"],"original-title":[],"language":"en","link":[{"URL":"http:\/\/iwaponline.com\/wst\/article-pdf\/60\/4\/1013\/448997\/1013.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"syndication"},{"URL":"http:\/\/iwaponline.com\/wst\/article-pdf\/60\/4\/1013\/448997\/1013.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2020,3,28]],"date-time":"2020-03-28T00:39:01Z","timestamp":1585355941000},"score":1,"resource":{"primary":{"URL":"https:\/\/iwaponline.com\/wst\/article\/60\/4\/1013\/13617\/Factors-influencing-release-of-phosphorus-from"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2009,4,1]]},"references-count":0,"journal-issue":{"issue":"4","published-print":{"date-parts":[[2009,4,1]]}},"URL":"https:\/\/doi.org\/10.2166\/wst.2009.445","relation":{},"ISSN":["0273-1223","1996-9732"],"issn-type":[{"value":"0273-1223","type":"print"},{"value":"1996-9732","type":"electronic"}],"subject":[],"published-other":{"date-parts":[[2009,4,1]]},"published":{"date-parts":[[2009,4,1]]}}}