I’m still not sure how this new landscaping is supposed to work.

I’m still not sure how this new landscaping is supposed to work. My best guess is that the lower area is supposed to collect runoff and seepage from the surrounding lawn and other plants (and the street gutter behind me, interestingly enough) in order to…

Comment from Jeffrey Price:

It is a stormwater retention pond. It’s purpose is to collect water a certain amount of water and over the course of 2-3 days, allow that water to absorbed into the ground. Too much water should go toward and overflow drain and out into the stormwater sewers.