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层级制全局敏感性分析方法及其在地下水模型中的应用

刘玉姣 戴恒 李跃东 崔节波 文章

刘玉姣, 戴恒, 李跃东, 崔节波, 文章. 层级制全局敏感性分析方法及其在地下水模型中的应用[J]. 地质科技通报, 2024, 43(5): 216-224. doi: 10.19509/j.cnki.dzkq.tb20230308
引用本文: 刘玉姣, 戴恒, 李跃东, 崔节波, 文章. 层级制全局敏感性分析方法及其在地下水模型中的应用[J]. 地质科技通报, 2024, 43(5): 216-224. doi: 10.19509/j.cnki.dzkq.tb20230308
LIU Yujiao, DAI Heng, LI Yuedong, CUI Jiebo, WEN Zhang. Method of hierarchical global sensitivity analysis and its application in groundwater models[J]. Bulletin of Geological Science and Technology, 2024, 43(5): 216-224. doi: 10.19509/j.cnki.dzkq.tb20230308
Citation: LIU Yujiao, DAI Heng, LI Yuedong, CUI Jiebo, WEN Zhang. Method of hierarchical global sensitivity analysis and its application in groundwater models[J]. Bulletin of Geological Science and Technology, 2024, 43(5): 216-224. doi: 10.19509/j.cnki.dzkq.tb20230308

层级制全局敏感性分析方法及其在地下水模型中的应用

doi: 10.19509/j.cnki.dzkq.tb20230308
基金项目: 

国家自然科学基金项目 42172280

详细信息
    作者简介:

    刘玉姣, E-mail: Yujiaoliu0122@163.com

    通讯作者:

    戴恒, E-mail: daiheng@cug.edu.cn

  • 中图分类号: X523

Method of hierarchical global sensitivity analysis and its application in groundwater models

More Information
  • 摘要:

    在地下水建模中, 为了更好地利用有限的资金和资源去最优化地降低预测结果的不确定性, 需要使用敏感性分析来测算各个模型输入因素的重要性。提出了改进的层级制全局敏感性分析方法来量化不同类型的输入不确定性对输出结果不确定性的贡献, 并以此评估地下水模型中各个不确定性过程对输出结果的影响程度; 使用一个理想的地下水污染运移模拟模型作为算例对该新方法进行了测试和展示。结果表明, 模型的不确定性是该案例预测结果不确定性的主要来源, 而且地质模型的不确定性相较于其他模型更为重要。该方法能够为地下水模型提供更加全面的敏感性分析, 相较于传统的参数敏感性分析, 新方法能够考虑的不确定性输入因素更多, 计算效率明显提升, 可为模型使用者和管理者提供更有用的敏感性信息。

     

  • 图 1  多层结构的层级制不确定性分析框架

    M为模型集中包含的所有模型;θ为参数集中包含的所有参数;Sc为集合中包含的所有不确定的情景

    Figure 1.  Hierarchical uncertainty analysis framework for multi-layer structures

    图 2  潜水含水层一维地下水流示意图

    x为横向位置, m;L为河间地块横向的长度, m;其他参数见正文

    Figure 2.  Schematic diagram of one-dimensional groundwater flow model in an unconfined aquifer

    图 3  5 400 m处3种情景下8个模型的乙烯质量浓度预测结果的概率密度曲线(PDFs) (实线为均质模型,虚线为非均质模型)

    Figure 3.  Probability density functions(PDFs) of the ethene concentrations at 5 400 m for the 8 models under 3 scenarios, respectively

    图 4  5 400 m处3种情景下对8个模型预测结果平均后预测乙烯质量浓度的概率密度曲线(PDFs)

    Figure 4.  Probability density functions(PDFs) of ethene concentrations at 5 400 m using the average of 8 models under 3 scenarios, respectively

    图 5  不同的模型运算执行次数下5 400 m处乙烯质量浓度的3种敏感度系数的计算结果

    Figure 5.  Three sensitivity indices of ethene concentration at 5 400 m under different number of model executions

    图 6  预测结果总方差的逐层分解图(5 400 m处)

    Figure 6.  Variance decomposition of the total variance of prediction results at 5 400 m

    图 7  3种情景下的模型内方差分解结果

    Figure 7.  Decomposition of within model variance under 3 scenarios

    图 8  3种情景下8个模型在5 100~5 700 m内所有空间位置计算的乙烯质量浓度均值

    Figure 8.  Mean of ethene concentration calculated by 8 models at all locations from 5 100 to 5 700 m under 3 scenarios respectively

    图 9  3种敏感度系数随空间位置的变化图

    Figure 9.  Variation of three sensitivity indices with spatial locations

    图 10  对5 100~5 700 m范围内各位置输出结果的总方差进行逐层分解的结果

    Figure 10.  Variance decomposition of the total variance at each locations from 5 100 to 5 700 m

    图 11  6种过程子模型的敏感度系数随空间位置的变化

    地质模型(G1, G2)、入渗补给模型(R1, R2)和融雪模型(SN1, SN2)

    Figure 11.  Variation of sensitivity indices of the 6 models of all processes

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出版历程
  • 收稿日期:  2023-05-31
  • 录用日期:  2023-06-29
  • 修回日期:  2023-06-28

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