1. STORM-WATER OPPERTUNITIES What is storm water Land use and change Retain and Detain Opportunities for change

2. What is storm water The majority of Stormwater originates from precipitation events, but any water that does not soak into the ground and becomes surface runoff is stormwater. –Rain –Watering the lawn –Washing you car

3. Undeveloped Land Healthy cycle Very little runoff Clean water Land Use Changes

4. developed Land Unhealthy cycle Large amounts of runoff Polluted water Land Use Changes

5. Soil TextureCoefficient of Runoff Concrete or Asphalt1.00 Gravel – Compact0.70 Clay – Bare0.75 Clay - Light Vegetation0.60 Clay - Dense Vegetation0.50 Gravel - Bare0.65 Gravel - Light Vegetation0.50 Gravel - Dense Vegetation0.40 Loam - Bare0.60 Loam - Light Vegetation0.45 Loam - Dense Vegetation0.35 Sand - Bare0.50 Sand - Light Vegetation0.40 Sand - Dense Vegetation0.30 Grass Areas0.35 Land Use Changes

6. developed Land with water management Restore health of cycle Lower quantity of runoff Filter and clean water Land Use Changes

7. The volume and timing of runoff during peak flows Potential contaminants that the water is carrying Two negative effects of stormwater

8. Precipitation Event

9. Protection of salmon runs –Increased flow rates trick young salmon into swimming out to sea too early in life. –Alterations in the stream prevented salmon from successfully returning to they're spawning grounds. –Increased non-point pollution run off from nearby roads altered stream ecology. –Can create environments uninhabitable Real World Effects

10. Pervious Pavement Pervious construction methods allow water to pass through and infiltrate while providing structural stability

11. Bio-Swale Retain and Detain water to increase infiltration Removes sedimentation from streams Bioremediation through plants

12. Sea-Street renovation project Before and After pictures Reduce area of impervious pavement Increase vegetation Bioremediation in bio-swales Increase property values Increased environmental and social health

13. Green Roof

14. Common green roof with no human access, still wonderful for stormwater reduction

15. Green Roofs can be more than just functional! Here’s a green roof garden A green roof urban park (cap over parking garage) Even green roof bus stops

16. Detention and Retention Ponds Meadow Brook Retention Ponds restore natural flows to stream accommodate peak flows protect and restore habitat

17. Meadowbrook Retention Pond Restoration of natural system Habitat creation Human interactions Educational opportunities

18. New Standards for Development Organizations like LEED create opportunities for sustainable design solutions to stormwater related problems Seattle is one of the leaders in sustainable design for urban environments