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A modeling approach for assessing the effect of multiple alpine lakes in sequence on nutrient transport

机译：一种评估多个高山湖泊依序对养分迁移影响的建模方法

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摘要

The effects of a single lake on downstream water chemistry may be compounded by the presence of additional lakes within the watershed, augmenting or negating the effects of the first lake. Multiple, linked lakes are a common feature of many watersheds and these resemble reactors in series often studied in engineering. The effects of multiple lakes in series on nutrient transport are largely unexplored. We populated and calibrated a simple lake model to investigate the role of a sub-alpine lake (Bull Trout Lake (BTL), Rocky Mountains, USA) on the transport of the macronutrients during the summer of 2008. Further, we developed a sequential model in which four identical lakes (copies of the BTL model) were connected in series. All lakes in the sequence retarded the flux of nutrients, thus slowing their transport downstream. The first lake in the sequence dramatically altered stream water chemistry and served as a sink for C and P and a source of N, while additional lakes downstream became sources of C, N and P. Although additional downstream lakes resulted in important changes to water chemistry and nutrient transport, the nature of the changes were similar from Lakes 2 to 4 and the magnitude of the changes diminished with distance downstream. Our lake model served as an effective tool for assessing the nutrient budget of the lake and the hypothetical effect of multiple lakes in sequence in a landscape limnology framework.
机译：一个流域对下游水化学的影响可能会因流域内其他湖泊的存在而加剧，从而增强或消除了第一个湖泊的影响。多个相连的湖泊是许多流域的共同特征，这些类似反应堆的反应堆经常在工程中进行研究。串联多个湖泊对养分迁移的影响在很大程度上尚待探索。我们填充并校准了一个简单的湖泊模型，以研究2008年夏季亚高山湖泊（美国落基山脉的比尔特劳特湖（BTL））在大量营养素运输中的作用。此外，我们建立了一个顺序模型其中四个相同的湖泊（BTL模型的副本）串联连接。该序列中的所有湖泊都阻碍了养分的流动，从而减缓了其向下游的运输。该序列中的第一个湖泊极大地改变了溪流水的化学性质，充当了C和P的汇和氮的来源，而下游的其他湖泊成为C，N和P的来源。尽管其他下游的湖泊导致了水化学的重要变化和营养物质的输送，变化的性质在2至4个湖泊之间是相似的，并且变化的幅度随着下游距离的增加而减小。我们的湖泊模型是一种有效的工具，可在景观林学框架中依次评估湖泊的养分收支和多个湖泊的假设效果。

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  • 来源
    《Aquatic Sciences》 |2013年第2期|199-212|共14页
  • 作者

    Dave M. Epstein; Bethany T. Neilson; Keli J. Goodman; David K. Stevens; Wayne A. Wurtsbaugh;

  • 作者单位

    Department of Watershed Sciences and the Ecology Center, Utah State University, 5205 Old Main Hill, Logan,UT 84322, USA;

    Department of Civil and Environmental Engineering,The Utah Water Research Laboratory, 8200 Old Main Hill,Logan, UT 84322, USA;

    Department of Biology and the Ecology Center,Utah State University, 5305 Old Main Hill,Logan, UT 84322, USA;

    Department of Civil and Environmental Engineering,The Utah Water Research Laboratory, 8200 Old Main Hill,Logan, UT 84322, USA;

    Department of Watershed Sciences and the Ecology Center, Utah State University, 5205 Old Main Hill, Logan,UT 84322, USA;

  • 收录信息 美国《科学引文索引》(SCI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    landscape limnology; nutrient transport; lakes; nitrogen;

    机译：景观学营养素运输;湖泊氮;

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