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Stormwater Management Credits for Tree Preservation and Planting

Explore how urban trees can enhance stormwater management in Arlington County. Learn about the complexities of crediting tree preservation and planting, and discover recommendations for incorporating trees into compliance frameworks.

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Stormwater Management Credits for Tree Preservation and Planting

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  1. Stormwater Management Credits for Tree Preservation and Planting Arlington County Government Jason Papacosma, Watershed Programs ManagerJuly 18, 2019

  2. Overview • Urban trees have well-established benefits for the hydrologic cycle • Urban trees are not accounted for in Virginia’s stormwater management compliance framework and computations • Not a land cover option or a stormwater best management practice (BMP) • A potential tool to add to the compliance toolbox and incentivize tree preservation and planting

  3. Crediting Complexities • Functionality changes over time and space • New trees vs mature trees • Lot level vs watershed scale • Future mortality and lost functions/credits

  4. Recommendation • Virginia DEQ study to determine how these practices could be incorporated into VRRM computations as land cover type and/or BMP • Build upon the research and recommendations EPA Chesapeake Bay Program and others (e.g., Center for Watershed Protection) • Convene a stakeholder group • Develop recommendations and specifications

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