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Morris Sensitivity Analysis for Hydrothermal Coupling Parameters of Embankment Dam: A Case Study

机译：堤防大坝水热耦合参数莫里斯敏感性分析 - 以案例研究

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摘要

Recently, the use of the temperature tracer method has attracted a great deal of attention to study the dam leakage. Accurate estimation of temperature variations inside the dam is critical, and the task can be achieved by identifying which variables play more important roles in the hydrothermal coupling model (HTCM). In the present study, the HTCM of an embankment dam is defined based on the thermal conductivity model proposed by Lu et al. (2007). The thermal conductivity model needs several input parameters, many of which are usually determined by pedotransfer functions, which may introduce a certain degree of uncertainty. Using the Morris method, the embankment dam of a reservoir, located in Shaanxi province of China, was chosen as the case study to investigate the sensitivity of each parameter of the HTCM on the temperature field of the embankment dam. The sensitivity analysis showed that the hydraulic conductivity (Ks) of HTCM has the highest effect on the dam temperature field. On the other hand, the saturated water content (s), residual water content (r), and porosity (n) only slightly influence the temperature estimation of the model. Accordingly, the effects of these three parameters on the heat conduction and the subsequent temperature field of the dam can be neglected. Results of this study showed that the model correction workload can be substantially reduced. Hence, the efficiency of the model correction procedure leads to reasonable selection of decision parameters and can be significantly improved by reducing the number of these parameters for the HTCM of the embankment dam.
机译：最近，使用温度跟踪方法吸引了研究坝泄漏的大量关注。准确估计大坝内部的温度变化至关重要，并且可以通过识别水热耦合模型（HTCM）中发挥更重要作用的任务来实现任务。在本研究中，基于Lu等人提出的导热率模型来定义堤坝的HTCM。 （2007）。导热率模型需要若干输入参数，其中许多通常由网兜传递功能确定，其可以引入一定程度的不确定性。使用莫里斯方法，位于中国陕西省的水库的堤防大坝作为案例研究，研究了HTCM对堤防水坝温度场的每个参数的敏感性。灵敏度分析表明，HTCM的液压导电性（KS）对坝温场具有最高效果。另一方面，饱和含水量，残余含水量（R）和孔隙率（n）仅略微影响模型的温度估计。因此，可以忽略这三个参数对热传导和随后的坝温度场的影响。该研究的结果表明，模型校正工作负载可以大大减少。因此，模型校正过程的效率导致合理选择决策参数，并且可以通过减少路堤大坝HTCM的这些参数的数量来显着改善。

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  • 来源
    《Mathematical Problems in Engineering》 |2019年第13期|2196578.1-2196578.11|共11页
  • 作者

    Ren Jie; Zhang Wenbing; Yang Jie;

  • 作者单位

    Xian Univ Technol State Key Lab Ecohydraul Northwest Arid Reg China Xian 710048 Shaanxi Peoples R China|Xian Univ Technol Inst Water Resources & Hydroelectr Engn Xian 710048 Shaanxi Peoples R China;

    Xian Univ Technol State Key Lab Ecohydraul Northwest Arid Reg China Xian 710048 Shaanxi Peoples R China|Xian Univ Technol Inst Water Resources & Hydroelectr Engn Xian 710048 Shaanxi Peoples R China;

    Xian Univ Technol State Key Lab Ecohydraul Northwest Arid Reg China Xian 710048 Shaanxi Peoples R China|Xian Univ Technol Inst Water Resources & Hydroelectr Engn Xian 710048 Shaanxi Peoples R China;

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