%0 Journal Article
%T Phosphorus removal by the multipond system sediments receiving agricultural drainage in a headstream watershed
%A FU Qiang
%A YIN Cheng-qing
%A MA Yun
%A <br>FU Qiang
%A YIN Cheng-qing
%A MA Yun
%J 环境科学学报(英文版)
%D 2005
%I 
%X Wetland systems in headstream watersheds are important to control the nonpoint source pollutant phosphorus. Experiments were conducted using intact sediment-water columns obtained from the multipond system in Liuchahe watershed of Chaohu Lake to determine its capacity to retain P. It was found that pond sediments had strong P retention ability. For the Hill pond, Village pond and Rice pond, their retention coefficient(A) were 288.3, 279.2 and 260.8 L/m2, respectively. The equilibrium P concentration(EPC_w) were 0.016, 0.028 and 0.018 mg/L, respectively. The Hill pond indicated the highest P retention ability. P retained in the pond sediments indicated high stable degree. P removal from the overlying water column into the pond sediments followed a first-order kinetic model. Under the experimental hydrological conditions, the retention time had a positive correlation with the P loading. The multipond system could provide enough retention time to retain P in drainage runoffs. At the P levels evaluated, the sediments of the multipond system are effective sinks to retain P from nonpoint source runoffs.
%K phosphorus
%K pond
%K sediment
%K watershed
%K nonpoint source<br>磷
%K 多池塘系统
%K 刘叉河分水岭
%K 巢湖
%K 农业排泄
%K 水体污染
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=6CB1530875F53489BF1E81BD87B7F5E6&aid=D97CF49186EFE1C0B0EF1C89159F73E5&yid=2DD7160C83D0ACED&vid=BCA2697F357F2001&iid=38B194292C032A66&sid=B79ACB6EBBFC9730&eid=A53D7AA35F9929AF&journal_id=1001-0742&journal_name=Journalofenvironmentalsciences(China)&referenced_num=1&reference_num=17