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Rain gardens presentation julia jones
- 2. Purpose “Rain gardens can effectively trap and retain 99 percent of common pollutants in urban storm runoff, potentially improving water quality and promoting the conversion of some pollutants into less harmful compounds”
- 3. The Problem • Typical urban setting 75% impervious coverage • 50% storm water runoff • Pollution • Metals • Oils • Fertilizers • Other “particulate matter”
- 4. The Solution • Rain garden hydrologic cycle • Two types • Under-drained • Infiltration not desire • Pipes transport clean water • Porous planting media • 2 hours to drain • Self-contained • Infiltration • Porous planting media • 4 hours to drain
- 6. RAIN GARDENS IN SITE PLANNING
- 7. Site Inventory • Issues • Erosion • Compaction of soil • Excess runoff volume • Eye sores • Positive Attributes • Good views • Existing vegetation and plant species • Travel patterns
- 8. Site Inventory • Features • Wind and sun direction • Noise pollution • Infrastructure • Site drainage patterns • Slopes • Soil types
- 9. SiteAnalysis Placement and Size • Moisture and water issues • Traffic patterns • Wildlife • The cost of excavation
- 10. SiteAnalysis Type • Moisture • Soil types • Environmental and aesthetic functions • Maintenance initiatives
- 11. Case Study • 2 year study conducted • Michael Dietz and John Clausen of the University of Connecticut • Storm water runoff from rooftops • Significantly reduced concentrations of nitrates, ammonias, phosphorus, and other pollutants
- 12. Lansing Michigan • Sewage overflow plan • Incorporated in the streetscape • Michigan Ave
- 15. CONCLUSION • Rain gardens are effective • Practical and aesthetically pleasing • Incorporated in site planning process