Wang says that there's also an automatic irrigation system mounted atop the wall. When it waters the plants, nutrient-rich water soaks into the fabric and flows downward. Channels at the base of the wall draw the excess water away.
兩廳院總務行政部經理王順益說，綠牆上方還設置一套自動澆溉系統，施灌時養液就會沿著不織布一邊吸收，一邊向下流，牆面下方還設有溝渠讓水流出去。