Melbourne's inner suburban parks and gardens are littered with ugly crash barriers. They are filled with water and via a dripper line, water our drought ravaged trees. Now any gardener knows that trees need water at the tips of their roots, not around the base of the trunk. The tips of the roots are usually near the outer drip line of the tree and nowhere near the trunk.
I understand Melbourne City Council is paying 13 cents per day per barrier to have these barriers located and maintained. Perhaps fourteen cents would have ensured the dripper line was long enough and correctly postioned.