首页> 外文会议>2nd International Nitrogen Conference , Oct 14-18, 2001, Potomac, Maryland, USA >Nitrogen Retention in Headwater Streams: The Influence of Groundwater-Surface Water Exchange
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Nitrogen Retention in Headwater Streams: The Influence of Groundwater-Surface Water Exchange

机译:上游水流中的氮保留:地下水-地表水交换的影响

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Groundwater-surface water (GW-SW) interaction lengthens hydraulic residence times, increases contact between solutes and biologically active surfaces, and often creates a gradient of redox conditions conducive to an array of biogeochemi-cal processes. As such, the interaction of hydraulic patterns and biogeochemical activity is suspected to be an important determinant of elemental spiraling in streams. Hydrologic interactions may be particularly important in headwater streams, where the extent of the GW-SW mixing environment (i.e., hyporheic zone) is proportionately greater than in larger streams. From our current understanding of stream ecosystem function, we discuss nitrogen (N) spiraling, present a conceptual model of N retention in streams, and use both of these issues to generate specific research questions and testable hypotheses regarding N dynamics in streams.
机译:地下水与地表水(GW-SW)的相互作用延长了水力停留时间,增加了溶质与生物活性表面之间的接触,并经常产生有助于一系列生物地球化学过程的氧化还原条件梯度。这样,水力模式和生物地球化学活性的相互作用被认为是河流中元素螺旋的重要决定因素。在GW-SW混合环境(即流变带)的范围要比较大的河流成比例地更大的上游水流中,水文相互作用可能特别重要。根据我们对河流生态系统功能的当前理解,我们讨论氮(N)螺旋,提出氮在河流中保留的概念模型,并使用这两个问题来生成有关河流中N动力学的特定研究问题和可检验的假设。

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