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<br />......' ~.... ,.ij.~i <br />~!!..,.rl"'l- ...~.' <br />....~,. . L".".. . <br /> <br />7-7 <br /> <br />topics include how to build and maintain a Xeriscape garden, how to convert lawn areas to <br />Xeriscape principals, alternative turfs, native plants, edible Xeriscape, irrigation systems, <br />. zoning design, and appropriate mulching. Reprints, specific plant information and brochures <br />are given away at these seminars. <br /> <br />A plant "show-and-tell" has also been presented by a local nursery. The past two <br />summers, the Parks Department sponsored Ii. judged landscape contest, of which one of the <br />categories was Xeriscape. . <br /> <br />The Utilities and Parks Departments initiated a small Xeriscape demonstration <br />garden just west of the Justice Center, adjacent to the Boulder Creek Trail (see Figure 7-4). <br />From time to time, people inquire about the garden, especially those who use the Boulder <br />Creek Trail. This garden has enabled the City to experiment with alternative grasses under <br />different watering conditions. The City has proven the versatility oi the Xeriscape <br />alternative due to periodic lapses in maintenance and the continued survival of the. garden. <br /> <br />A Xeriscape design will be employed at the City's wastewater treatment plant as a <br />part of the plant's 1989 upgrade. Included in. the design will be cool season alternative turf <br />grass, short grass prairie mix, native plantings, and more. The mission of this xeriscaping is <br />to both limit water use requirements at the plant and to minimi7-C maintenance efforts and. <br />cost. <br /> <br />Xeriscape has shown as much as 50 percent of eXterior water use savings for those <br />who effectively employ its practices3 Because it is impossible to judge who was impacted <br />by the City's Xeriscape program, a conservative market penetration for this program was <br />estimated as yielding minimal peak-day savings of 0.01 to 0.1 mgd. <br /> <br />7.1.8 Central Irrigation Control System <br /> <br />The Parks Department and Utilities Division will be developing a centrally-controlled <br />computerized Motorola MIR 5000 central irrigation system. The City estimates that 50 <br />-. percent of Boulder's parks will be on-line by the end of the summer oi 1990, By the end <br />of 1990, 100 acres will be covered by the system. It is anticipated that by 1992, all 300 acres <br />of parks will be covered by this system. The Parks Department will install and operate the <br />System over the next two years. Irrigation schedules are adjusted as needed through a <br />computer terminal to the field units. They are based on ET factors including temperature, <br />wind, relative humidity, and solar radiation. This allows maximum.turf quality with minimal <br /> <br />3Nelson, J.O., Water' Conserving Landscapes Show Impressive Savings. A WW A Annual <br />. Conference, Denver\ Colorado (June 1986). <br /> <br />10.. <br />