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Stormwater Quality Design Manual (May 2007) - City of Sacramento ...

Stormwater Quality Design Manual (May 2007) - City of Sacramento ...

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Run<strong>of</strong>f Reduction Control Measure Fact SheetInterceptor TreesExamples <strong>of</strong> Suitable uses <strong>of</strong> Interceptor TreesResidential: large and small subdivisions, small-scaledevelopments, located in or out <strong>of</strong> municipal right-<strong>of</strong>-way. Thetree pictured is an evergreen Camphor.Commercial: plazas and courtyards, landscape areas inparking lots and road frontages.Industrial: Employee parking lots, entryway features, androad frontages.Parks and Open Space: parking lots, park hardscape areas.VariationsThree types <strong>of</strong> interceptor trees are discussed in this fact sheet: 1) new evergreen trees, 2) new deciduoustrees, and 3) existing trees.New Evergreen TreesEvergreen trees provide the greatest benefit to water quality. Generally, the larger the tree and the smallerthe leaves, the more rain is intercepted. Further, evergreen trees retain their leaves throughout the rainyseason.New Deciduous TreesSince the interceptor tree’s water quality benefit increases with increasing surface area <strong>of</strong> leaves andbranches, deciduous trees, which lose their leaves early in the Central Valley’s rainy season, have lessvalue than evergreen trees. However, even deciduous trees contribute to interception and shading, andcredits are applied for inclusion <strong>of</strong> such trees in site plans.<strong>Stormwater</strong> <strong>Quality</strong> <strong>Design</strong> <strong>Manual</strong> for the <strong>Sacramento</strong> and South Placer Regions<strong>May</strong> <strong>2007</strong>INT-3

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