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首页> 外文期刊>Canadian Water Resources Journal >Stratigraphic sequence map for groundwater assessment and protection of unconsolidated aquifers: A case example in the Abitibi-Temiscamingue region, Quebec, Canada
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Stratigraphic sequence map for groundwater assessment and protection of unconsolidated aquifers: A case example in the Abitibi-Temiscamingue region, Quebec, Canada

机译：地下水评估和非固结含水层保护的地层层序图：以加拿大魁北克的阿比蒂比－特米斯卡明格地区为例

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Quantifying water resources at various scales is crucial for ensuring safe access to potable water for present and future generations. Fitting into this framework, this study presents a GIS-based approach aimed at allowing the evaluation of available groundwater resources within unconsolidated aquifers set in vast and heterogeneous shield regions. The approach was developed in a 19,397 km(2) region located in Abitibi-Temiscamingue (Quebec, Canada) where unconsolidated aquifers are set in an irregular geologic framework owing to the rugged Canadian Shield topography and to the diversity of glacial and post-glacial events that shaped the landscape. Sparse and unevenly distributed stratigraphic borehole data were used for constructing a GIS-based model representing the total overburden thickness (unconsolidated sediments covering the bedrock), as well as the thickness and extent of the fine-grained deep-water sediments (silt-clay) of the Barlow-Ojibway proglacial Lake on a 100 m x 100 m mesh at the regional scale. The study suggests a new set of functions to map drift thickness in areas of highly discontinuous drift cover, using GIS tools. These data were used jointly with surficial deposits maps in order to develop a regional-scale two-dimensional model where 15 distinct stratigraphic sequences allow representation of the architecture of unconsolidated geological units. The approach allows simplifying data representation and ensuring the consistency between various regional-scale hydrogeological maps. The data is used to produce a stratigraphic sequence map for representing the architecture of aquifer- aquitard systems at the regional scale in a manner that is intelligible to non-specialists. The map and related data are first discussed for documenting the extent and volume of regional aquifers. The stratigraphic sequence map is subsequently discussed as a tool for supporting political decision makers dealing with issues related to groundwater resource assessment, protection and sustainable development.
机译：量化各种规模的水资源对于确保今世后代安全获取饮用水至关重要。在此框架内，本研究提出了一种基于GIS的方法，旨在评估广阔而异质的盾构区域内未固结含水层中的可用地下水资源。该方法是在位于加拿大魁北克省Abitibi-Temiscamingue（加拿大魁北克）的19397 km（2）区域开发的，由于崎Canadian的加拿大盾构地形以及冰川和冰川后事件的多样性，未合并的含水层被设置在不规则的地质框架中塑造了景观。稀疏和分布不均的地层钻孔数据用于构建基于GIS的模型，该模型表示总上覆层厚度（覆盖基岩的未固结沉积物）以及细粒深水沉积物（粉砂土）的厚度和范围在区域范围内以100 mx 100 m的网格划分Barlow-Ojibway平湖。这项研究提出了一套新的功能，可以使用GIS工具在高度不连续的漂移覆盖区域绘制漂移厚度。这些数据与地表沉积物地图一起使用，以开发区域尺度的二维模型，其中15个不同的地层序列可以表示未整合的地质单元的结构。该方法可以简化数据表示并确保各种区域尺度的水文地质图之间的一致性。数据用于生成地层序列图，以非专业人员可以理解的方式表示区域尺度上的含水层—阿奎塔尔系统的体系结构。首先讨论地图和相关数据，以记录区域含水层的范围和数量。随后讨论了地层层序图，以此作为支持政治决策者处理与地下水资源评估，保护和可持续发展有关的问题的工具。

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  • 来源
    《Canadian Water Resources Journal》 |2018年第2期|113-135|共23页
  • 作者

    Nadeau Simon; Rosa Eric; Cloutier Vincent;

  • 作者单位

    Univ Quebec Abitibi Temiscamingue, Inst Rech Mines & Environm, Grp Rech Eau Souterraine, Amos, PQ J9T 2L8, Canada;

    Univ Quebec Abitibi Temiscamingue, Inst Rech Mines & Environm, Grp Rech Eau Souterraine, Amos, PQ J9T 2L8, Canada;

    Univ Quebec Abitibi Temiscamingue, Inst Rech Mines & Environm, Grp Rech Eau Souterraine, Amos, PQ J9T 2L8, Canada;

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