black creek watershed updates · 2018. 9. 10. · black creek watershed association-shows up and...
TRANSCRIPT
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Christy Perrin, Water Resources Research Institute; NCSU
go.ncsu.edu/blackcreek
Black Creek Watershed updates
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Persistence
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Black Creek Watershed Association- shows up and gets it done
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Interested, engaged population, willing private and public partners, WRRI, NCSU BAE, Town of Cary staff support
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Our story (briefly) in Black Creek watershed
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Excessive stormwater flows & volume-Black Creek Watershed Plan, 2009
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Benthic macro-invertebrate sampling
• Spring/fall 2006-2007• May/Nov 2016• EPT taxa richness values
consistently within 3-6 taxa range suggesting “Poor” water quality conditions using DWR criteria.
http://penrose.consulting/
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Engage partners to disconnect impervious surfaces from creeks
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Intercept stormwater, protect creek
• 24 residential “rainscapes” (1 more in process)• 3 rainwater harvesting cisterns • 5 large bioretention areas (big rain gardens!)
• West Cary Middle (2), Northwoods Elementary, Harvest Church, Kingswood Elementary
• 1 bioswale• Permeable walkways• 2 stream stabilizations
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• Project sites
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West Cary Middle School- BEFORE
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West Cary Middle School-AFTER
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West Cary Middle School- After After After
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What is needed? A person(s) who can check in 1-2x yearly, plan service events, and a little $
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Some coordination, a couple clubs seeking service hours, and $350
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More recently: KingswoodElementarySTEMMontessoriTeam: Dept. Bio & Ag EngineeringNatural Learning Initiative, College of DesignNCSU ExtensionCenter for Human and Earth RestorationWater Resources Research Institute
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K-5 students engaged
• macroinvertebrate session
• STEM Expo• site exploration &
data collection • planting
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Design graduate students provided ideas
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Parent & teacher feedback on green infrastructure ideas
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Before bioretention
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Before bioretention
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“This is so much fun! So much better than sitting in the classroom!” -real 4th grade boy
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“It’s really great to get a break from the computer screen”- actual PhD student
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Before cistern & replanting
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“We love getting our hands in the dirt!”- actual WRRI/NC Sea Grant colleagues
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Residential rain gardens (rainscapes)
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9/10/2018
Beechtree HOA efforts- stream erosion before
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9/10/2018
Beechtree HOA efforts- after stream stabilization
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9/10/2018
Beechtree HOA efforts- after stream stabilization
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9/10/2018
Small scale stream stabilization workshop
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Hotels on Harrson: proposal up for rezoning
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Low impact development hotel: Goals
• Post-devpt. hydrology regime = pre-devpthydrology
• Monitor and document effectiveness of approach
• Use as example for other developers
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Low impact development hotel: Hotel design/construction
• Compare traditional design (stormwater pond) w LID design
• Design and construct site using “hydrology protecting” stormwater devices (infiltrates/evapotranspirates)• 0 - 10% of pre-development runoff from site
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Stream impact monitoring• Compare traditional design (stormwater pond) w LID
design (use SNAP and/or SWMM)• Pre-construction stream assessment• Hydrology monitoring pre-construction, post-
clearing, during/post construction• Post-construction stream assessment
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9/10/2018
What’s next? So many outdoor selfie opportunities…