If the water-tight stratum had already existed, what the groundwater pressuredistribution regular in it.
若已知存在不透水层，不透水层内的水压力分布规律如何。
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The program is utilized to calculate soil rocks dam free surface position variation and pore-waterpressuredistribution condition with time when the up water level position changed.
It contains instruments to measure wind, both horizontally and vertically; temperature and water droplet distribution inside clouds; pressure and humidity; and lightning.