United States Department of Transportation
i
The Effects of a Winter Ice Jam Event on Bioengineered Bank Stabilization Along the Kenai River
-
2007-10-01
[PDF-1.54 MB]
Details:
-
Creators:
-
Corporate Creators:
-
Corporate Contributors:
-
Subject/TRT Terms:
-
Publication/ Report Number:
-
Resource Type:
-
Geographical Coverage:
-
TRIS Online Accession Number:01103973
-
Edition:Final Report
-
Corporate Publisher:
-
Abstract:This report documents and presents the results of a study on the effect of ice forces on bioengineered riverbank protection structures. Following an unusual winter ice jam event on the Kenai River, affected bank revetment structures were evaluated during several field visits. A visual analysis of the structures identified whether or not damage was incurred by the ice event. At two large root wad installations, many suffered damage to the roots or tines forming the wad, though the boles remained firmly in place. Root stems were snapped off by ice floes, generally in a downstream direction. At one site with a well-established willow brushlayering treatment above the root wads, the upper bank appeared to be well-protected against gouging ice floe damage by the willow trees growing there. The findings of this study and others on bioengineered structures in Alaska suggest that some sacrificial damage may be expected to occur if root wads are subjected to direct impacts from large ice floes. Well-established willow brushlayers appear to work well in protecting the upper bank from ice damage on steep banks, and are resilient in recovering from ice jam damage.
-
Format:
-
Funding:
-
Collection(s):
-
Main Document Checksum:
-
Download URL:
-
File Type:
