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Restoration Components
1. Channel morphology & floodplain connection
2. In-stream structures
3. Streambank bioengineering
4. Riparian buffers & habitat enhancements
5. Stream crossings
6. Stormwater/watershed management
7. Monitoring & maintenance
8. Public access & education
2. In-Stream Structures (Logs & Rocks)• Streambank protection• Habitat enhancement (pools, aeration, cover)• Grade control• Sediment transport
J-Hook Boulder Vane
Runaway Truck Ramp
J-Hook
Boulder Vane
J-Hook Boulder Vane (scour pool)
J-Hook Log Vane
J-Hook Log Vane
Multiple Log Vanes
Saugahatchee Creek
2007
2008
Multiple Log Vanes
Saugahatchee Creek
2009 January
2009 JulyPhoto Credit: Dan Ballard, Town of Auburn
Boulder Cross Vane
Double-Drop Boulder Cross Vane
Double-Drop Offset Boulder Cross Vane
Photo Credit: CAWACO RC&D
Double-Drop Offset Boulder Cross Vane
Offset Boulder Cross Vane at a Bridge
Boulder Double Wing Deflector
Constructed Riffle
Z - Vane
Constructed Step-Pool
Constructed Step-Pool
Habitat Enhancements
• Food sources• Cover• Scour pools• Flow diversity
Pool Maintenance
Successful Structures
• Properly designed and located• Low profile• Constructed to withstand stress• Excellent vegetation
• Temporary matting• Root wads• Bioengineering (living brush mattress)• Armoring
3. Streambank Stabilization
• Biodegradable (coir, jute, excelsior)• Seed and straw UNDER mat• Keep matting relaxed• Key in at top• Stakes: wood or biodegradable plastic
Temporary Matting
Root Wads
10-15 ft tree trunk attached
Streambank Bioengineering:
2007 NCSU Rocky Branch 2008
Integrating living woody and herbaceous materials to increase strength and structure of the soil (i.e. increase critical shear stress)
Brush Mattress
live cuttings of silky willow in dormant season
2007 October
2009 August
Successful Matting• Biodegradable (coir, jute, excelsior)• Seed and mulch under matting• Wooden stakes (long stakes at toe)• Key at top of bank• Keep matting relaxed
No Plastic!
Seed & mulch UNDER matting
Problems:Poor stakingHigh shearOverland flow
Root Wads
Temporary Non-living Revetment
Root Wads• Temporary streambank
protection
• Absorb streamflow energy
• Enhance habitat
• Use with transplants or adjacent to mature vegetation
• Placement should be at the toe of the bank and facing into stream velocity vectors
• May result in eddy scour
Root Wads with Brush
Layer
Brush Mattress
Bank armoring where hand labor makes sense
Live cuttings in dormant
season
Cover with soil, straw, and wire
Kentucky CreekNewland, NC
April, 2004
VegetativeGeolifts
2006
Cane CreekFletcher, NC
2007
Successful Streambank Stabilization
• Low streambanks• Dense vegetation• Temporary biodegradable matting• Bioengineering in high-stress areas• Proper channel morphology
4. Riparian Buffer (Streamside Forest)• Temporary ground covers• Permanent grasses• Wetland plants• Shrubs and trees
Mulch> 75% cover
2 tons/ac
Wheat or MilletTemporary Nurse Crop
Permanent Grass Cover
Root depth matters
Live Stakes
2007
Transplants
1996
20052005
Bare Root Seedlings
Container Plants
Successful Vegetation• Natives only• Quality plants• Installed correctly• Watered and fertilized if needed
5. Stormwater Management
• Energy dissipation• Floodplain retention• Channel protection• Water quality treatment
Floodplain stormwater retention and treatment
Pollution Prevention
• Cattle exclusion• Illicit discharge removal• Runoff treatment
Agricultural best management practices ( BMPs)
“Passive Restoration”
6. Stream Crossings
• Aquatic organism passage• Minimize geomorphic impacts• Pass flood flows
Rocky BranchArch Culvert
7. Monitoring & Maintenance• Projects are most vulnerable early• Natural adjustments to hydrologic &
habitat conditions
Restoration?
Mission accomplished?
Jumping Run Creek, Payne Dairy, Alexander Co, NC
2001 - 2009
Questions:1. Water quality
improved?2. Habitat improved?3. Restoration achieved?
After 8 years: • Cattle excluded• Vegetation
established• Bank erosion halted• Bed form enhanced• Aesthetics improved
Jumping Run Creek, Payne Dairy, Alexander Co, NC
Annual Geomorphic Surveys, 2001 - 2009
Jumping Run Creek, Payne Dairy, Alexander Co, NC
Annual Macroinvertebrate Sampling, 2000 - 2009
Streambank erosion is minimal
Sediment transport is in equilibrium
Water quality and habitats are improving
Downstream water quality improved
Was this Restoration Effective?
• Need more focus on macro- and micro-habitats:
• Riffles, pools, glides
• Fine roots
• Wood
• Cover and food sources
• Hyporheic connections
• Reduce large steps with inappropriately large boulders
• Provide floodplain connection
• Expect beavers
Lessons Learned:
8. Public Access & Education• Greenways & paths• Signs• Tours
Charlotte-Mecklenburg: Little Sugar Creekwww.charmeck.org/Departments/StormWater/Projects
Successful Ecosystem Restoration Achieve ecological goals
Self-sustaining
Serve as model for future projects
Accepted by the public