northern connecticut river fluvial geomorphology assessment – appendix 5
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Northern Connecticut River Fluvial Geomorphology Assessment – Appendix 5. Pros : No investment Avoid complicated setting Slow rate of erosion. Cons : Does not address concerns Instability remain. Do Nothing Option. Northern Connecticut River Fluvial Geomorphology Assessment – Appendix 5. - PowerPoint PPT PresentationTRANSCRIPT
Northern Connecticut River Fluvial Geomorphology Assessment – Appendix 5
Do Nothing Option
Pros:- No investment- Avoid complicated
setting- Slow rate of erosion
Cons:- Does not address
concerns- Instability remain
Northern Connecticut River Fluvial Geomorphology Assessment – Appendix 5
Northern Connecticut River Fluvial Geomorphology Assessment – Appendix 5
Conservation Easement Option
Pros:- Slower rate of erosion- Improve habitat- Erosion concerns
alleviated- Low cost
Cons:- Several years before
well established- Poor soils on fan
surface- High plant mortality
Northern Connecticut River Fluvial Geomorphology Assessment – Appendix 5
Northern Connecticut River Fluvial Geomorphology Assessment – Appendix 5
Bioengineering Option
Pros:- Create habitat- Bank stabilization- Demonstration value- Compatible with
easement option
Cons:- Expensive- Difficult to secure on
high gravelly bank- Short term protection
Northern Connecticut River Fluvial Geomorphology Assessment – Appendix 5
Northern Connecticut River Fluvial Geomorphology Assessment – Appendix 5
Channel Realignment Option
Pros:- Relieve pressure on
bank- Channel placed
where good cover
Cons:- Possible unintended
consequences- Expensive- Permitting difficulties
Northern Connecticut River Fluvial Geomorphology Assessment – Appendix 5
Northern Connecticut River Fluvial Geomorphology Assessment – Appendix 5
Remove Riprap Option
Pros:- Accommodates
excess sediment- Improve stability
downstream- Compatible with
easement option
Cons:- Erosion increased- Public resistance- Remote chance of
extending beyond easement
Northern Connecticut River Fluvial Geomorphology Assessment – Appendix 5
Northern Connecticut River Fluvial Geomorphology Assessment – Appendix 5
Alluvial Fan Access Option
Pros:- Decrease sediment
supply- Relieve pressure on
VT 102- Return to more
natural condition
Cons:- Further assessment
needed- Limited area available- Public resistance- No short term
improvements
Northern Connecticut River Fluvial Geomorphology Assessment – Appendix 5