biofiltration
Although the concept is relatively unfamiliar in the United States and largely untested here, pools supported by an entirely natural approach to filtration and water management have been under development in Europe for decades and have caught on there in a big way in recent years. In this special feature, German watershaper and natural-pool expert Rainer Grafinger discusses the ‘technology’ behind this potent European trend. For most people in the United States, swimming is far from a natural experience: Bathers move back and forth in man-made, chemically treated backyard or public swimming pools and seldom (if ever) find themselves in
Every so often, a project comes along that evolves as it rolls along, and what starts out as one set of tasks and parameters morphs to become something entirely different before it’s through. That was certainly the case on this residential-lake project: Located in the hills above Napa Valley, Calif., the job put us in touch with affluent, intelligent, fun-loving clients who had initially contacted us about the straightforward restoration of a dying lake located at the base of a ravine beset with unchecked plant growth and rattlesnakes. None of that was new to us: We
To make a pond or stream successfully "natural," the designer and installer must know what it takes to produce a convincing illusion that the end product is actually a naturally occurring body of water. It's no secret in the trade that this illusion is made or broken at the edges, where the physical boundaries between waterway and the hardscape and plantings must be both precisely controlled and completely concealed. Necklaces of stone won't cut it, nor will waterlines sharply defined by lines of terrestrial plants. In fact, the challenge here is to make visually linear boundaries disappear, and that's a tall order for even the best pond/stream designers and builders. In my own projects, I work almost every day in tweaking and refining my approaches to these margins and edge treatments, and I've come up with many ways to enhance the natural appearance of my ponds and streams. In recent years, I've been honing a technique for landscaping in and around the water that's given my work an entirely new dimension: It's a type of planting container I call a "dirt pocket" - a simple structure that lets me plant a broad range of non-aquatic plants directly in contact with
