管底以上的地下水位和管道接口的防渗施工质量是地下水渗入量大小的决定性因素。
The groundwater level above pipe bottom and anti-infiltration of pipe joint are the decisive factors affecting the groundwater infiltration rate.
地下水流是水于地下蓄水层或地下水位线以上的空间流动。
Subsurface flow is the flow of water underground, in the vadose zone and aquifers.
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