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Storm Water in the Puget Sound Region

Storm Water in the Puget Sound Region. It’s the hydrology …. Puget Sound Toxics and Storm Water. Highly contaminated sediments typically in urban/industrial areas Storm water concern rightly on toxics delivery and recontamination. Puget Lowlands and Storm Water.

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Storm Water in the Puget Sound Region

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  1. Storm Water in the Puget Sound Region It’s the hydrology ….

  2. Puget Sound Toxics and Storm Water • Highly contaminated sediments typically in urban/industrial areas • Storm water concern rightly on toxics delivery and recontamination

  3. Puget Lowlands and Storm Water • Storm water concern in rural and developing areas should be focused on runoff water quantity • Focus on runoff quantity may lead to more effective solutions in both rural and urban areas

  4. Natural Flow Regime • Native stream biota are adapted to historical (pre-development) flow regime

  5. Puget Lowland Development • Most development in the Puget Lowland has occurred at the expense of forest land From: Daniel Sorenson. Summary of Land-Cover Trends – Puget Lowland Ecoregion. USGS Land Cover Trends Project http://landcovertrends.usgs.gov/west/eco2Report.html

  6. Storm Water Runoff Suburban vs. Undeveloped From: Derek Booth, David Hartley and Rhett Jackson. 2002. Forest Cover, Impervious-Surface Area, and the Mitigation of Stormwater Impacts. JAWRA 38:835-845.

  7. Modeled Storm Water Runoff “Fully-forested” vs Developed

  8. Modeled Storm Water Runoff “Fully-forested” vs Developed

  9. Correlations with B-IBI From: DeGasperi et al. 2009. Linking hydrologic alteration to biological impairment in urbanizing streams of the Puget Lowland, Washington, USA. JAWRA 45:512-533.

  10. Natural Drainage Design • Preserve forest cover • Maintain native soils • Minimize effective impervious cover • Infiltrate runoff whenever/wherever possible • Minimize direct connection of effective impervious cover to receiving streams

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