July 15 2015 02:22 PM
AWG fall

We’ve been accustomed to a limitless supply of cheap, even ‘free’ water for years. Now it’s becoming painfully obvious that those days are coming to an end. Growing populations have drained down aquifers across the continent. Dated stormwater management systems are in desperate need of an overhaul as heavy rains, often contaminated by raw sewage, flow directly into the nearest creek, river or ocean, rather than into recharge basins, and in many areas the rains aren’t falling at all as weather patterns shift.

Droughts are nothing new; however, as the population moves into more severe climate conditions, in areas that we’re already straining to support, the burden becomes more difficult. But it isn’t only California, or even the West Coast, that is experiencing drought, although these areas are the most severely impacted. The Northern Plains, the Southwest, the Southeast, even the well-watered Northeast have all recently faced the spectre of drought restrictions as well.

Unfortunately, responses to over-stretched water supplies have a direct effect on the Green Industry. Using the West Coast as an example, California, inits fourth season of drought, is adopting an unprecedented series of water saving measures. In addition to mandating a statewide 25 percent reduction in overall potable urban water use, and urging the replacement of old appliances with more water- and energy-efficient models, Governor Brown specifically targeted landscape and agricultural water usage by Executive Order to:

•Replace 50 million square feet of lawns throughout the state with drought-tolerant landscaping, in partnership with local governments;

•Require campuses, golf courses, cemeteries and other large landscapes to make significant cuts in water use; and

•Prohibit new homes and developments from irrigating with potable water unless water-efficient drip irrigation systems are used, and ban watering of ornamental grass on public street medians.

Misunderstood and maligned, ornamental water features are also on the chopping block, but for all the wrong reasons. As we discovered with horror during the preliminary review of the EPA WaterSense initiative, the popularly-held belief in political circles is that water features are functionless and impractical, fed by open taps running water off into the landscape. The lack of information about how modern water features work, and their myriad health and environmental benefits, led to a blanket prohibition of ornamental water features in a Draft of the Water-Efficient Single-Family New Home Specification of May 22, 2008:

•4.1.4 Ornamental water feature – “Builders shall not install or facilitate the installation of ornamental water features. Explaining …. because these water features serve no functional or practical purpose, their water use is not considered efficient.”

In that instance, thankfully, a small, vocal consortium, alerted by the late Andy Smith (who will be sorely missed) and backed by dedicated water-feature manufacturers, contractors and activists, was able to explain the concept of ‘recirculation’ to Congressmen—no small task!— and outline the functional and practical aspects of fountains, ponds, waterfalls, man-made streams and other decorative water-related construction. This has led to a realistic revision of the WaterSense Home guidelines. The Final Specification now reads:

•4.1.5 Ornamental water features – Ornamental water features financed, installed, or sold as upgrades by the homebuilder must recirculate water and serve a beneficial use.

Unfortunately, the misconception that ‘water features are water wasters,’ with recirculation the exception instead of the rule, still persists. A case in point is the wording of the Los Angeles Water Works Districts Restrictions, Clause 4, banning “operating a fountain or other decorative water feature, except where the water is part of a recirculating system.” San Diego went even further in its Additional Drought Alert Restrictions, mandating that homeowners must “Stop operation of ornamental fountains, except to the extent needed for maintenance purposes.”

The fact that most water features with moving water use recirculating pumps is apparently as unknown to many legislative bodies as it was to the EPA. It is just one of the mistaken assumptions that give rise to the idea that these features use far more water than they actually do.

In fact, the vast majority of modern water features are inherently water conservative, going to great lengths in their designs to retain, rather than require, water. Impervious liners like EPDM, PVC and LLDPE completely waterproof the typical feature, with far fewer losses to leakage, seepage or absorption. Unless there’s an actual hole somewhere, the only water that needs to be replaced in today’s water features is what’s lost to evaporation and splash.

In the last decade, well-designed, inexpensive rainwater-harvesting devices, such as first-flush diverters, provide a convenient way to keep larger features filled when rains permit, recapturing what is lost to the atmosphere. Contrary to popular perception, the water consumed by water features just doesn’t add up to much, in the larger picture of total water usage in the landscape.

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