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首页> 外文期刊>Nordic hydrology >Exploring runoff processes using chemical, isotopic and hydrometric data in a discontinuous permafrost catchment
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Exploring runoff processes using chemical, isotopic and hydrometric data in a discontinuous permafrost catchment

机译：在不连续冻土集水区中使用化学，同位素和水文数据探索径流过程

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摘要

Hydrometric, isotopic and hydrochemical data were used to investigate runoff generation in a discontinuous permafrost headwater catchment. Research was undertaken between 10 April and 8 July 2008 within Granger Basin, a 7.6 km~2 sub-catchment of the Wolf Creek Research Basin, Yukon Territory, Canada. The objectives of this research were to utilize hydrometric, stable isotope and hydrochemical methods to: (i) establish water balance components and (ii) couple water balance information with stable isotope and hydrochemical information to provide an enhanced understanding of runoff sources and pathways. The water balance components were snowmelt (152 mm), precipitation (68 mm), evaporation (88 mm), discharge (173 mm) and change in storage (- 41 mm). The runoff ratio was high compared with previous years in this catchment. Using two-component hydrograph separation, pre-event water represented ～73% of total discharge during freshet. End-member mixing diagrams suggested three contributing sources to streamflow in the following order: groundwater, soil water and snowmelt water. Concentration versus discharge diagrams identified the dilution of weathering ions during melt, while the ratio of potassium to calcium in streamwater suggests early contributions of pre-event water to discharge. Results from this research support previous work that pre-event water dominates freshet, yet the role of deeper groundwater is highlighted as an important contribution.
机译：水文，同位素和水化学数据被用来调查非连续冻土源头集水区的径流产生。研究于2008年4月10日至7月8日在加拿大育空地区沃尔夫克里克研究盆地7.6 km〜2小流域格兰杰盆地进行。这项研究的目的是利用水文法，稳定同位素和水化学方法来：（i）建立水平衡成分，以及（ii）将水平衡信息与稳定同位素和水化学信息相结合，以增强对径流源和径流的了解。水平衡成分为融雪（152毫米），降水（68毫米），蒸发（88毫米），排放（173毫米）和储水量变化（-41毫米）。与往年相比，该流域的径流率很高。通过两部分水位图分离，事件发生前的水占淡水总排放量的〜73％。最终成员混合图建议按以下顺序为水流提供了三个贡献来源：地下水，土壤水和融雪水。浓度与排放关系图确定了融化过程中风化离子的稀释度，而溪流中钾与钙的比例表明事件前水对排放的早期贡献。这项研究的结果支持以前的研究，即事前的水在淡水中占主导地位，但强调深层地下水的作用是重要的贡献。

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  • 来源
    《Nordic hydrology》 |2010年第6期|p.508-519|共12页
  • 作者

    Jessica L. Boucher; Sean K. Carey;

  • 作者单位

    Department of Geography and Environmental Studies, Carleton University, Ottawa, Ontario, Canada K1S 5B6;

    Department of Geography and Environmental Studies, Carleton University, Ottawa, Ontario, Canada K1S 5B6;

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

    hydrochemistry; isotopes; runoff; snowmelt; subarctic water balance;

    机译：水化学同位素径流;融雪亚北极水平衡;

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