江苏省科技期刊可视化阅读平台

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江苏科技信息 ›› 2016, Vol. 33 ›› Issue (13): 56-57.doi: 10.3969/j.issn.1004-7530.2016.13.012

• 论文 • 上一篇    下一篇

农田排水沟渠氮磷去除效果研究

曹有玲, 王皓, 霍雨   

  1. 内蒙古自治区水利水电勘测设计院,内蒙古呼和浩特,010020;呼和浩特市环境信息自动监控中心,内蒙古呼和浩特,010020
  • 出版日期:2016-05-05 发布日期:2016-05-05

Research on the Removal Effects of Nitrogen and Phosphorus in Farmland Drainage Ditches

Cao Youling, Wang Hao, Huo Yu   

  • Online:2016-05-05 Published:2016-05-05

摘要： 文章初步探讨了河套灌区天然排水沟渠内水流速度、沟内水草生长状况（时间）及沟内水流停留时间与氮磷去除效果的关系，结果表明：总氮（TN）、氨氮（NH4+－N），硝氮（NO3-－N），总磷（TP）年内每千米去除率平均分别为7.11%，12.59%，9.65%，6.20%，且随水流速度增大而减小，而底泥的吸附作用是排水沟渠内氮磷去除的主要原因，提出利用“闸阀控制-植物吸附-底泥更换”方法在河套灌区天然排水沟渠内改造构建多个小型天然-人工复合湿地系统，可有效削减排水过程中的氮磷迁移，对减轻乌梁素海水体富营养化具有一定借鉴作用。

关键词: 河套灌区, 农田排水沟渠, 氮磷去除效果, 天然-人工复合湿地系统, 乌梁素海

Abstract: This article investigates the relationship between nitrogen-phosphorus removal effect with water flow rate of natural drainage ditches, the plants growth conditions (time) and ditch water residence time in the Hetao Irrigation District. The results show that:total nitrogen (TN), ammonium(NH4+-N), nitrate(NO3--N), total phosphorus (TP) removal average rate is 7.11%, 12.59%, 9.65%, 6.20%respectively per kilometer during the year and decreases with increasing flow rate, while the adsorption of sediment in the drainage ditch is the main reason for the removal of nitrogen and phosphorus. Basing on this and the practice in South irrigated rice fields, the “sluice valve control-plant adsorption-sediment replace” reform is raised to build small scale natural-artificial wetland complex systems in Hetao District drainage ditches, thus nitrogen and phosphorus are reduced through controlling the migration of nitrogen-phosphorus effectively in the migration process meanwhile easing water eutrophication in Lake Ulansuhai, Inner Mongolia.