curtain drain

intercepting drain

A drain located between the water source and the protected area.
References in periodicals archive ?
Any external leakage should also be taken care of with either grading corrections, curtain drain or some sort of effective waterproofing.
The basement that exists today, protected by a curtain drain and a sump pump, was completed soon thereafter, 27 years late.
If you decide on a curtain drain, stop laying the stones about a foot from the top of the trench, lay a landscape fabric over the stones and top it with a couple of inches of coarse sand.