| 摘要 |
A drainage system includes: at least one first drainage pipe to be disposed within the ground and including a single-piece first porous pipe wall that has a top open end, a bottom open end for extending to a level distant from the ground surface, and a plurality of first through holes to permeate the surface water into adjacent soil areas; and at least one second drainage pipe transversely connected to the first drainage pipe, and including a single-piece second porous pipe wall that has two opposite open ends, and a plurality of second through holes disposed between the two opposite open ends of the second porous pipe wall to permeate the surface water into adjacent soil areas.
|
