有限单元法库区渗流场数值模拟及敏感性分析

Numerical simulation of reservoir seepage field the finite element method and the parameter sensitivity analysis

库区渗流场的分布特征，很大程度上决定了其工程特性，同时定量化分析其参数的敏感性也是难题之一。根据实际工程应用的需要，采用FORTRAN程序，编写了调用针对东部某抽水电站上库区渗流场数值模拟的计算程序，研究了库区渗流场的计算方法，并论证了该计算方法的正确性和实用性。由工程实例计算结果的地下水等水位线图中可知，库区地下水分水岭与地表水分水岭基本一致；由模型参数敏感性分析可知，第Ⅳ渗透性分区渗透参数的变化对地下水渗流场变化有较大的影响，其它区域渗透参数变化时，地下水渗流场变化不明显，分析结果证明该计算方法适应性强、精度高、应用方便、实用性好。

The distribution of reservoir seepage field,largely determines its engineering properties,which is an important indicator of the hydrogeological evaluation of reservoir conditions.While sensitive quantitative analysis of its parameters is one of the problems.According to the actual engineering applications,using FORTRAN program calls for the preparation of the hydropower station.The results calculated by the project,such as groundwater water line graph shows that the groundwater reservoir watershed water shield is consistent with surface water,groundwater recharge from the south and on the north side by the spring in the form of excretion;the model parameter sensitivity analysis shows that changes in the permeability of the first partition ⅳ penetration parameters have a greater impact on groundwater seepage field changes,when infiltration parameters other areas,on the other areas of groundwater seepage field penetration is not sensitive to changes in parameters,the results show that the calculation method is convenient.