Runnel Excavation
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Runnel excavation is being used in east coast salt marsh (Spartina spp.) to increase drainage in sections of restored marsh by excavation of narrow shallow trenches as part of ditech remediation. This is anticipated to support loss of high marsh, and reduce high levels of surface saturation. Runnel excavation is often used in conjunction with ditch remediation.
Notes
- A google search turns up activity
- On the east coast runnels are typically shallow and narrow, and do not aim to drain the peat zone. Runnels can be implemented with volunteers and shovels.
- Maintenance appears to be required on some sites. The potential role of relic ditch capture of ebb tide energy is unclear is the need for maintenance.
- The severity of marsh modification on the east coast prevents a clear blind tidal channel reference model Tidal Channel Reference Model
Questions
- How does Spartina root/shoot density affect natural blind tidal channel density in east coast marshes? Does the intense root adn shoot density reduce the density of natural channel formation? (see Tidal Channel Reference Model
