1 / 21

Blacksburg Country Club Restoration Design

Blacksburg Country Club Restoration Design. Matt Gloe & Trip Krenz. 05 May 2010 BSE 5984—Team Project. Overview. Watershed characteristics Reach Classifications Flow Analysis, Design Flows Hydraulic Geometry Modeling Solutions Maintenance & Monitoring.

hope
Download Presentation

Blacksburg Country Club Restoration Design

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Blacksburg Country ClubRestoration Design Matt Gloe & Trip Krenz 05 May 2010 BSE 5984—Team Project

  2. Overview • Watershed characteristics • Reach Classifications • Flow Analysis, Design Flows • Hydraulic Geometry • Modeling • Solutions • Maintenance & Monitoring

  3. Reach &Watershed characteristics • BBCC mitigation • Chemical spill • Resultant fish kill • Actively failing banks • Land Use • ~ 70% forest • ~ 30% ag/residential • Drainage Area • 12,000 ha

  4. Restoration Goals • Reduce sediment loading from failing banks • Preserve and augment the forested riparian buffer • Provide habitat for the Roanoke Log Perch

  5. Reach classification • Rosgen: Alluvial C4 • Montgomery-Buffington: Alluvial pool-riffle • Classification

  6. Flow analysis

  7. Design flows

  8. Hydraulic geometry

  9. Reference reach geometric comparison

  10. Bank stability & erosion

  11. Bank re-shaping & protection Grade from unstable angle to 3:1 Incorporate coir fiber logs and mats Reduces overall shear stress ~ sediment load Planted with native veg

  12. Hydrologic models Pre bank-shaping Post bank-reshaping • HEC-RAS • Modeled to ensure 100-yr floodplain not augmented

  13. Riparian Buffer Planting

  14. In-stream bank protection • In-stream structures • J-hook vane • Cross-vane weir

  15. = 2.8 kg/m2

  16. Monitoring, maintenance, & success • XS re-survey (annually 5 yr) • XS area + 15% of design • Longitudinal • Feature slopes + 0.5% of design • Longpro slope + 0.3% of design • Structures • Installation angle variance < 3° • Slope variance < 2%

  17. Monitoring, maintenance, & success • Riparian Structure • > 400 woody stems/acre through year 3 • 30% canopy coverage years 3-5 • 60% herbaceous cover year 1  80% years 2-5 • Benthic Macroinverts • VSCI semi-annually  VDEQ multi-habitat protocol • Reasonable upward trend through year 5 • Ecosystem function • Leaf litter breakdown: multi-spp. mix, standard leaf • Algal growth rates (~ NPP) • 2° production  length-mass regressions

  18. Restoration summary • Reduce sediment loading from failing banks • Bank reshaping and planting • Cross-Vane Weir • J-Hook Vane • Preserve and augment forested riparian buffer • Planting of native trees • Planting on banks • Provide habitat for the Roanoke Log Perch • Reduction in sediment load • Scour pools developed below structures • Vegetation will cool stream

  19. Questions?

More Related