Pondless Backyard Fountain Pond and Waterfall. Even without the fountain, which in Az will grow algae like nobody's business, I think the idea of softening up the patio with a little rock garden with plants mixed in.
The sound of running water is soothing and can add tranquility to any landscape. You can either pair a landscape waterfall with a pond or create one without a pond. These instructions describe how to design and build a waterfall without a pond.