1 Need for drainage During rain or drainage, the fields become wet. The water infiltrates into the soil and is stored in its pores. Drainage can be either natural or artificial. Natural drainage, however, is often inadequate and artificial or man-made drainage is required. There are two types of artificial drainage: surface drainage and subsurface drainage. Line the pots with pebbles to ensure good drainage.
The drainage system has collapsed because of too much rain. Webster’s New World College Dictionary, 4th Edition. These examples have been automatically selected and may contain sensitive content. They perform best in exceptionally mild gardens with good drainage. Then they go in with lymphatic drainage massage.