...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Environmental Science and Health. A, Toxic/Hazardous Substances & Environmental Engineering >Variation In The Instream Dissolved Inorganic Nitrogen Response Between And Within Rainstorm Events In An Urban Watershed
【24h】

Variation In The Instream Dissolved Inorganic Nitrogen Response Between And Within Rainstorm Events In An Urban Watershed

机译：城市流域暴雨事件之间和暴雨过程中河床内部溶解态无机氮响应的变化

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Urban streams play a significant role in the transport of dissolved inorganic nitrogen (DIN) from uplands to sensitive coastal receiving waters.In this study,we investigate the timing of DIN export through monitoring conducted during several storm events of different magnitude and with different antecedent conditions in an urban catchment.Our monitoring was conducted at a first-order stream site in a highly urban catchment in the northeastern United States during four rainstorms.Nitrate made up the dominant portion of the DIN load during all four events and the response of nitrate and ammonia were very different.Discharge,rather than concentration,was the most important factor in determining nitrate export with hot moments of nitrate export coinciding with peaks in flow.However,the highest nitrogen concentrations were observed after the streamflow peak during all of the events.During extreme rainstorms,this delayed response may constitute an important secondary hot-moment of nitrate export.These results may be significant for the development of nitrogen management plans for urban watersheds,especially since many water quality improvement BMPs (best management practices) are being designed to treat the first-flush of stormwater and would miss much of the DIN load.
机译：城市溪流在溶解态氮从高地向敏感的沿海接收水域的运输中起着重要作用。在这项研究中，我们通过监测在不同强度和不同前期条件下的几次暴风雨事件来研究DIN出口的时间。在四次暴雨期间，我们的监测是在美国东北部一个高度城市集水区的一线水流站点进行的，硝酸盐在这四个事件中占DIN负载的主要部分以及硝酸盐和硝酸盐的响应氨是非常不同的。在确定硝酸盐输出的最重要因素中，排放量而不是浓度是最重要的因素，硝酸盐输出的热时刻与流量峰值一致。但是，在所有事件中，在流量峰值之后都观察到最高的氮浓度。在极端暴雨期间，这种延迟的响应可能构成硝酸盐释放的重要次要热时刻。这些结果对于制定城市流域的氮管理计划可能具有重要意义，尤其是由于许多水质改善BMP（最佳管理实践）正被设计为处理初冲的雨水，并且会错过许多DIN负荷。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号