According to the general pattern of ground water lowering, this paper suggested a volume calculation method in the natural river courses in the freezing period.
根据地下水退水的一般规律，提出了针对天然河道封冻期流量推求方法的建议。
This paper recommends a method of lowering the ground water table by setting up the horizontal drains in hill slopes.
介绍在土坡中设置水平渗水管来降低地下水位的一种方法。
This paper recommends a method of lowering the ground water table by setting up the horizontal drains in hill slopes.
介绍在土坡中设置水平渗水管来降低地下水位的一种方法。
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