Hey Stream People and Potomologists
David Derrick and John McCullah are teaching a course in Portland on August 4th at StormCon. This will be a great chance to catch John and Dave "together again”, teaching a new course entitled “Repairing Entrenched, Incised, and Degraded Urban Streams - Techniques and Case Studies”.
Go to http://stormcon.com/downloads/StormCon14Program_hires.pdf for more information.
Repairing Entrenched, Incised and Degraded Urban Streams – Techniques and Case Studies
Urbanization, with its associated decrease in overall infiltration and increases in impermeable surfaces, along with a proliferation of hydrologic and hydraulic sciences that “get the water off the site”, frequently result in incision of the associated urban streams. Not just urbanization but also other anthropogenic factors such as dams, heavy long-term grazing, highly roaded timber areas, and instream gravel mining.
Urban stream entrenchment, incision, and degradation are a high-priority, national issue leading to poor water quality, loss of riparian function, loss of aquatic habitat and costly threats to infrastructure. The new provisions of the Clean Water Act are an attempt to deal with these issues. Post-construction BMPs and revegetation requirements, along with LID and other reductions of hydromodification during development and construction are now required as part of the NPDES program.
Urban streams which are “properly functioning”, are often mimicking pre-development conditions - with healthy stream buffers, riparian zones, and instream function that can often ameliorate the effects of urbanization and other anthropogenic land use problems.
This course will deal with some of the tools needed to design and build naturally-functioning stream, river, and creek reaches. The material will be presented with the extensive use of Case Studies. John McCullah will present projects utilizing Bioengineering and Environmentally-Sensitive techniques from US, and Canada, to New Zealand, some spanning over 15 years. John will also use some Dirt Time Video Clips to present projects. You can almost smell the diesel and dust!
David Derrick will present many projects from his extensive collection of stream projects. David promises a new Case Study from a Urban Steam project in the Cleveland area. He says, “this project has it all - all the urban area concerns from stormwater to Riparian Buffers to Parks …"
In 2005, the Transportation Research Board and National Cooperative Highway Research Board published NCHRP Report 544 – Environmentally Sensitive Channel and Bank Protection Methods Report 544- Environmentally Sensitive Channel and Bank Protection Methods. This report, authored by J. McCullah, D. Gray, and D.F. Shields was published on CD and includes over 50 Techniques, from re-directive Rock Vanes and Bendway Weirs to Vegetated Rip Rap and Longitudinal Stone Toe with Live Siltation. It incorporates design considerations, construction specifications and detailed drawings. An Educational Version of this design guidance document will be provided free to all StormCon class attendees. $100 value