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含水层层状非均质对地下水流系统的影响

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张俊, 刘天罡, 董佳秋, 王晓勇, 查元源, 唐小平, 尹立河, AndrewJ. Love. 2020. 含水层层状非均质对地下水流系统的影响[J]. 中国地质, 47(6): 1715-1725. doi: 10.12029/gc20200609
引用本文: 张俊, 刘天罡, 董佳秋, 王晓勇, 查元源, 唐小平, 尹立河, AndrewJ. Love. 2020. 含水层层状非均质对地下水流系统的影响[J]. 中国地质, 47(6): 1715-1725. doi: 10.12029/gc20200609
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ZHANG Jun, LIU Tiangang, DONG Jiaqiu, WANG Xiaoyong, ZHA Yuanyuan, TANG Xiaoping, YIN Lihe, Andrew J. Love. 2020. The impact of aquifer layered heterogeneity on groundwater flow system[J]. Geology in China, 47(6): 1715-1725. doi: 10.12029/gc20200609
Citation: ZHANG Jun, LIU Tiangang, DONG Jiaqiu, WANG Xiaoyong, ZHA Yuanyuan, TANG Xiaoping, YIN Lihe, Andrew J. Love. 2020. The impact of aquifer layered heterogeneity on groundwater flow system[J]. Geology in China, 47(6): 1715-1725. doi: 10.12029/gc20200609
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含水层层状非均质对地下水流系统的影响

  • 1.

    中国地质调查局 干旱半干旱区地下水与生态重点实验室, 陕西 西安 710054

  • 2.

    中国地质调查局西安地质调查中心, 陕西 西安 710054

  • 3.

    河北省众联能源环保科技有限公司, 河北 石家庄 050056

  • 4.

    武汉大学 水资源与水电工程科学国家重点实验室, 湖北 武汉 430072

  • 5.

    School of the Environment/National Centre for Groundwater Research and Trainning, FlindersUniversity, Adelaide SA 5001, Australia

  • 基金项目:
    国家自然科学基金项目“毛乌素沙地土壤水分冻融入渗机理及同位素效应研究”(41402226)和中国地质调查局项目“鄂尔多斯盆地北部湖泊集中分布区1：5万水文地质调查”(DD20160293)资助
详细信息
    作者简介: 张俊, 男, 1982年生, 高级工程师, 硕士, 主要从事水文地质研究; E-mail:36170038@qq.com
    通讯作者: 刘天罡, 男, 1992年生, 硕士, 工程师, 主要从事水文地质与环境评价工作; E-mail:905194427@qq.com

  • 中图分类号: P641

The impact of aquifer layered heterogeneity on groundwater flow system

  • 1.

    Key Laboratory for Groundwater and Ecology in Arid and Semi-arid Areas, CGS, Xi'an 710054, Shaanxi, China

  • 2.

    Xi'an Center of Geological Survey, China Geological Survey, , Xi'an 710054, Shaanxi, China

  • 3.

    Hebei Zhonglian Energy Environmental Protection Technology Co., Ltd., Shijiazhuang, 050056, Hebei, China

  • 4.

    State Key Laboratory of Water Resources and Hydropower Engineering Sciences, Wuhan University, Wuhan 430072, China

  • 5.

    School of the Environment/National Centre for Groundwater Research and Training, Flinders University, Adelaide SA 5001, Australia

  • Fund Project: Supported by Geological Survey Project of China Geological Survey (No. DD20160293) and National Natural Science Foundation of China (No. 41402226)
More Information
    Author Bio: ZHANG Jun, male, born in 1982, senior engineer, mainly engages in the study of hydrogeology; E-mail:36170038@qq.com .
    Corresponding author: LIU Tiangang, male, born in 1992, engineer, majors in the study hydrogeology and environmental assessment; E-mail:905194427@qq.com

    摘要

  • 区域尺度上含水层非均质具有复杂的结构性和随机性，难以准确刻画，造成非均质对区域地下水流系统的影响机制研究不够深入。本文以鄂尔多斯盆地白垩系地下水流系统为研究实例，选择典型剖面，采用剖面二维随机数值模拟方法，通过对比不同非均质刻画方法下地下水流场的变化，探讨含水层层状非均质对地下水流系统的影响机制。结果显示，均质条件下模型各向异性(含水层水平和垂向渗透系数比值Kh/Kv)取值为1000时，地下水流场与实际条件较为接近；非均质条件下，渗透系数方差取值0.91，水平相关长度取值5000 m，Kh/Kv取值150时，接近实际条件。研究表明，在大尺度地下水流模拟研究中，采用水平相关长度、渗透系数方差和各向异性值三个变量生成的随机场能很好地刻画含水层的层状非均质特征及其对水流系统的影响控制作用。由于含水层不同尺度层状非均质的叠加效应，采用均质各向异性介质等效概化含水层层状非均质性会造成等效各向异性值偏大失真的效应。

    Aquifer heterogeneity is an important factor influencing regional groundwater flow patterns. The complex structural and stochastic characteristics of regional-scale aquifer heterogeneity are difficult to characterize,which leads to insufficient understanding of the effects of heterogeneity on groundwater flow systems in practice. In this paper,the Cretaceous groundwater flow system in the Ordos Basin is studied based on the selected typical geological section. Stochastic numerical simulation of the two-dimensional section is employed to analyze the influence mechanism of aquifer layered heterogeneity on groundwater flow systems by comparing the changes of the groundwater flow field under different heterogeneity conditions. The results show that the groundwater flow net is close to the actual conditions when the ratio of horizontal to vertical conductivity (Kh/Kv) is 1000 in model for homogeneous aquifer. It is close to the actual conditions when the variance of conductivity is 0.91,the horizontal correlation length is 5000 m and Kh/Kv is 150 for heterogeneous aquifers. The stochastic simulated aquifer generated by three parameters (i.e.,horizontal correlation length,variance of permeability coefficient,and anisotropy ratio) can well characterize the layered heterogeneity of aquifer and its influence on the groundwater flow systems. Due to the superposition of layered heterogeneity at different scales,equivalent homogeneous,anisotropic model for conceptualizing layered heterogeneous medium in large-scale groundwater flow simulation may lead to a much larger horizontal-to-vertical anisotropy ratio than the ratio between horizontal and vertical correlation scales.

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  • 图 1  胡同察汗淖地下水流系统与典型剖面位置图

    Figure 1. 

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    图 2  均质条件不同各向异性条件模拟结果图

    Figure 2. 

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    图 3  渗透系数随机场部分模拟结果

    Figure 3. 

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    图 4  随机场渗透系数频数分布直方图

    Figure 4. 

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    图 5  不同渗透系数方差对应的剖面流网模拟结果

    Figure 5. 

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    图 6  不同水平相关长度对应的剖面流网模拟结果

    Figure 6. 

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    图 7  非均质条件下不同各向异性对应的剖面流网模拟结果

    Figure 7. 

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    图 8  与实际条件接近的剖面流网模拟结果

    Figure 8. 

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    图 9  鄂尔多斯盆地北部典型剖面地下水流模式示意图

    Figure 9. 

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收稿日期:  2018-09-01
修回日期:  2019-02-26
刊出日期:  2020-12-25

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