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Why Low Impact Development?
The document discusses the importance of low impact development (LID) in managing water quantity and quality issues caused by conventional stormwater practices. It highlights the benefits of implementing LID strategies, including reducing infrastructure costs and enhancing community appeal. Additionally, it addresses the various pollutants associated with stormwater and the effectiveness of different site planning and best management practices (BMPs).
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Why Low Impact Development?
- 1. Introduction: Why LowImpact Development?Robert Emanuel, Ph.D.Oregon State UniversityOregon Sea Grant Extension
- 2. Where is yourcommunity in the watershed?
- 3. Puget Sound ActionTeam, WSU Pierce County Extension
- 4. Puget Sound ActionTeam, WSU Pierce County Extension
- 9. Video by LauraJames, Seattle, WA
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- 12. Impacts of ConventionalApproachesWater quantity: too much too fast
- 13. Water quality: thestormwater superhighway for non-point pollutants
- 14. Costs: O &M, combined sewer overflows, etc.Water Quantity Impacts: Flooding & Erosion
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- 17. Nutrients(nitrogen, phosphorus)
- 18. Metals(copper*, lead, zinc, cadmium, mercury)
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- 20. Cleaningchemicals
- 21. Detergentsor soaps
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- 24. Increasedtemperature*Recent studies show link between these pollutants and salmonid olfactory disorientation and pre-spawning mortality.
- 27. Low Impact Development plans, ordinances, and best management practicesTo better protect our watershedsTo reduce infrastructure costsTo make our communities more attractive
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- 37. Pringle Creek Developmentin Salem
- 38. Kensington EstatesTotal acres:23.92 Lots: 103 (4,143 ft2ave.) Open space: 15 acres (63%)Effective impervious area: ~ 0 %
- 39. Kensington Estates CostComparison
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- 43. Portland Community College,Portland OR
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- 45. Port Orford, ORPhoto:Frank Burris, OSU
- 46. Glencoe Elementary School,Portland, OR
- 47. Photo by TomLiptan, City of Portland Environmental Services
- 48. Photo Koch LandscapeArchitecture, City of Portland Environmental Services
- 49. Photo Koch LandscapeArchitecture, City of Portland Environmental Services
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- 54. Green Street PlantersSW 12th @ Montgomery (PSU)
- 57. Rogue Valley SewerServicesPringle Creek, Salem, OR
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Editor's Notes
- #10 Laura James is a long-time scuba diver who lives in Seattle. James and a couple of buddies took video cameras down to where one West Seattle storm drain empties into Elliot Bay. Taken January 18th, after much of the Pineapple Express dumped a lot of water onto Seattle metro area.
- #13 In summary, we get three big issues with stormwater and conventional approaches to its management: too much too fast, poor quality water and increasing costs to maintain the system.
- #17 Emerging evidence that salmon olfactory is damaged. 63 pesticides were found at the source drinking water intake on the Clackamas River, near Portland, Oregon. Glyphosate and its derivative was one of the most frequent pollutants detected. Once invasives are established in an environment, our responsibility is to remove them where possible, but also we should be focusing efforts on preventing them in the first place.
- #37 Photo: Frank Burris, OSU Extension ServicePort Orford, OR Visitor’s Center Rain Garden
- #38 Glencoe Elementary School, Portland, OR Photo: Derek Godwin, OSU Extension Service
- #39 Ask permission of Tom Liptan and BES
- #40 This is a planter
- #41 This is a planter
- #42 Infiltration planter?
- #48 for an estimated budget of $81M. The green solutions included adding more than 500 green streets with vegetated curb extensions or stormwater planters…
- #52 Metro Building in Portland—Green roof covering 9,000 sq. ft. of surface and contrasted with rock-ballast roof that covers other 2/3 of total.