It depends on the landscaping and foliage. Basically, a healthy forest-type landscape will retain a good amount of the water. A grass field monoculture, a gol

It depends on the landscaping and foliage. Basically, a healthy forest-type landscape will retain a good amount of the water. A grass field monoculture, a golf course, will evaporate it all into the air and, depending on how you irrigate, much can be lost before even hitting the ground.