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Efficient Irrigation SIB-12 <br /> <br /> <br /> <br /> <br /> <br /> <br /> i' <br /> M <br /> <br /> <br /> <br /> <br /> <br />E <br /> <br /> 'o <br />Design Objectives <br />? Maximize Infiltration <br />? Provide Retention <br />? Slow Runoff <br />Minimize Impervious Land <br />Coverage <br />Prohibit Dumping of Improper <br />Materials <br />Contain Pollutants <br />Collect and Convey <br />Description <br />Irrigation water provided to landscaped areas may result in excess irrigation water being <br />conveyed into stormwater drainage systems. <br />Approach <br />Project plan designs for development and redevelopment should include application methods of <br />irrigation water that minimize runoff of excess irrigation water into the stormwater conveyance <br />Sy'steIn. <br />Suitable Applications <br />Appropriate applications include residential, commercial arid industrial areas planned for <br />development or redevelopment. (Detached residential single-family homes are t ,pically <br />excluded from this require nien .) <br />Design Considerations <br />Designing New Installations <br />The following methods to reduce excessive irrigation runoff should be considered, and <br />incorporated and implemented cohere determined applicable and feasible by the Pertnitt.ee: <br />¦ Employ rain-triggered shutoff de-ices to prevent irrigation after precipitation. <br />¦ Design irrigation systems to each landscape area's specific water requirements. <br />¦ Include design featuring low reducers or shutoff valves triggered by a pressure drop to <br />control water loss in the event of broken sprinkler heads or lines. <br />¦ Implement landscape plans consistent with County or City water consen,ition resolutions, <br />which may include provision of water sensors, programmable. <br />irritation times (for short cycles), etc. <br />Calitornia <br />Stormwater <br />Quality <br />Association <br />Janoary 2003 California 5tormwater BMP Handbook I of 2 <br />Nev. Development and Redevelopment <br />www.cabmphandbocks.com <br />20D-36