A garden or yard is supposed to be well-watered, not very soggy that plants can’t thrive in it anymore. For some people, the immediate solution is putting in a dry well, but such a fix doesn’t really help. For one, a dry well is simply a gravel-filled hole dug in the ground, which will quickly fill with water while the soil around it remains soggy. Subsequently, the dry well is rendered almost useless. There are far more effective drainage solutions that exist for drenched yards in Vancouver and elsewhere. Since a dry well is unlikely to correct such a problem, enter the capabilities of drain tiles, which are pipes with tiny holes (perforations) buried underground. Water enters the pipe through the perforations and makes its way to a dedicated place, where it’s discharged onto a retention pond or storm sewer.
http://kerrisdaleroofinganddrains.com/looking-to-solve-standing-water-issues-in-your-yard-get-a-drain-tile/
