| 基于水资源调度的平原河网区城市河道氮迁移转化研究 |
| 摘要点击 2184 全文点击 1666 投稿时间：2014-02-14 修订日期：2014-04-02 |
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| 中文关键词 水资源调度 城市河道 无机氮 氨氮释放 南通市 |
| 英文关键词 water resources regulation urban stream inorganic nitrogen release of ammonium Nantong City |
| 作者 | 单位 | E-mail | | 刘波 | 南通大学地理科学学院, 南通 226007
江苏省环境演变与生态修复重点实验室, 南京 210046 | lb@ntu.edu.cn | | 盛明 | 南通大学地理科学学院, 南通 226007 | | | 朱强 | 南通大学地理科学学院, 南通 226007 | | | 杨霜 | 南通大学地理科学学院, 南通 226007 | | | 檀炳超 | 南通大学地理科学学院, 南通 226007 | | | 范冉 | 南通大学地理科学学院, 南通 226007 | | | 南旭军 | 南通大学地理科学学院, 南通 226007 | | | 何茂阳 | 南通大学地理科学学院, 南通 226007 | | | 王国祥 | 江苏省环境演变与生态修复重点实验室, 南京 210046 | wangguoxiang@njnu.edu.cn |
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| 中文摘要 |
| 研究平原河网区城市河道在水资源调度过程中的水文特征和理化特征，探讨基于水资源调度的城市河道氮素形态与组成；在实验模拟条件下，研究基于水资源调度的城市河道沉积物NH4+-N释放过程. 结果表明，研究河段在水资源调度作用下水深日变化过程明显；以农历月为单位，水资源调度可以分为轻度置换阶段和深度置换阶段；沿调水路径河道上覆水DO有下降趋势，高锰酸盐指数则呈现升高趋势；沿调水路径上覆水NO3--N浓度逐渐减少，NH4+-N浓度显著升高；DO与高锰酸盐指数是影响上覆水NO3--N、NH4+-N浓度的主要因素；沉积物内源NH4+-N释放是上覆水NH4+-N的一个重要来源；水资源调度显著影响（P<0.05）上覆水NH4+-N浓度，对沉积物内源NH4+-N的释放影响不显著（P>0.05）. |
| 英文摘要 |
| To study hydrological features and physical and chemical characteristics of urban stream located in the plain river network area in the process of water resources regulation, and to discuss the forming and composition of nitrogen in urban stream based on water resources regulation. Effects of water regulation on the ammonium release from sediments in urban stream were studied under the condition of experimental simulation. The results showed that diurnal variation of water depth under the action of water resources regulation was significant. The value of DO in the overlying water along the water resources regulation path tended to decrease, while the concentration of permanganate index tended to increase. The concentration of nitrate in overlying water along the water resources regulation path gradually decreased, while the concentration of ammonium significantly increased. DO and permanganate index were the main factors influencing the concentrations of nitrate and ammonium in overlying water. Ammonium released from the sediments was an important source of ammonium in overlying water. Water resources regulation had a significant influence (P<0.05) on the concentration of ammonium in overlying water, but had no significant influence on the amount of cumulative ammonium released from sediments (P>0.05). |
