基于以前研究者的工作，提出了从细化网格图象中提取网格点的算法。
Based on former researcher's works, an algorithm for grid nodes extraction from thinned grid image is present.
网格划分可对整个坝体进行，只是在渗流逸出点附近要细化网格尺寸；
The gridding may be made on the whole dam body, with only the refining for the area near the egress points required.
如果不进行集中热容矩阵，无论是细化网格还是减小时间步长，其解决数值振荡问题的效果都不好。
However, if the heat capacity matrix is not lumped, the numerical oscillation problem can not to be resolved even though by refining the local mesh or by decreasing the time step.
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