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研究了河道溢流堰对水体DO及氮、磷的影响,结果表明:经溢流堰后,水体DO平均增加1.75 mg/L。当水温超过15℃,堰下DO低于4.00 mg/L时,堰下TN低于堰上,堰下DO高于4.00 mg/L时,堰下TN低于堰上。当水温低于15℃,堰下DO高于4.00 mg/L时,堰下TN高于堰上,TN升高。当DO增加较少时,堰下TP高于堰上,DO增加较多时,堰下TP低于堰上,TP得到一定降低。
Abstract：The effect of overflow weir for urban river on dissolved oxygen(DO),nitrogen(N) and phosphorus(P) in water is studied herein.The study shows that DO increases with the average value of 1.75 mg/L after flowing over the weir.When the water temperature exceeds 15 ℃ and the DO under 4.00 mg/L,the TN at the bottom of the weir is lower than that at the top.When the DO exceeds 4.00 mg/L,the TN at the bottom of the weir is lower than that at the top.When the water temperature is under 15 ℃ and the DO under 4.00 mg/L,the TN at the bottom of the weir is greater than that at the top.When the increased value of DO is less,the TP at the bottom of the weir is greater than that at the top.When the increased value of DO is greater,the TP at the bottom of the weir is lower than that at the top.
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基本信息:
中图分类号:X832
引用信息:
[1]王锦旗,王国祥.城市河道溢流堰对水体溶解氧及氮和磷的影响[J].水利水电技术,2006(10):11-13.
基金信息:
国家“863”“十五”重大科技专项(2003AA601100-2)