What's Wrong with Riprap?
Presenters: Dr. Stephanie Moret,
Ph.D., LEG, PG
John McCullah, Watershed Geologist, CPESC #311
President, Salix Applied Earthcare
Host, Dirt Time
On-Demand Webcast, 1hr*
Credits: 1 PDH / 0.1 CEUs
Have you ever watched or read the news and seen a house or a car bobbing down the middle of a river, or maybe a highway or bridge washed out? These tragedies are likely the result of a well-meaning engineer or developer forgetting to look at the bigger picture – how watersheds, rivers, and stream channels naturally work. Everybody seems surprised when a streambank erodes, bringing a piece of road or a home along with it – except for the fluvial geomorphologists!
Now, you have the opportunity to understand your work through the eyes of two very different interdisciplinary river geologists. We’ll explain both the big picture of how a river naturally works and the practical aspects of how you can work with it to create sustainable projects that work with a river’s natural processes rather than try to control these processes. Stephanie will start with some fluvial geomorphology 101 basics at the watershed scale, and most of the discussion will focus on John and his work at the reach scale, where the work is usually done. Discussions will include habitat, enhancements, substrate complexity, a little about “proper functioning condition” for the implementer/designer, and why riprap is bad.
- Recognize the functional components of a watershed and river.
- Explain basic watershed and river processes – in other words, how
a river works.
- Define the term “channel stability” at both the watershed scale
and the channel scale.
- Observe and hear about case studies of environmentally sensitive
streambank stabilization projects from the erosion control
specialist/fluvial geomorphologist who implemented the projects.
* Presentations are scheduled for approximately 60 minutes. Presentation may exceed scheduled time.
*Each state and certification agency has different requirements; it is your responsibility to know what they are.
Note that 1 PDH = 0.1 CEU.