drains parallèles

CONT: Drainage par canalisations enterrées. Les sols profonds (...) et perméables se drainent classiquement à l'aide de drains parallèles entre eux et raccordés à un collecteur.

CONT: The field drains of a surface system may be arranged in many patterns. Probably the two most widely used are parallel drains and random drains. Parallel drains are channels running parallel to one another at a uniform spacing of a few to several hundred feet apart, depending on the soil and the slope of the land.