CGRG Bibliography of Canadian Geomorphology
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Author : Guthrie, R.H.; Polster, D.F.; and Switzer, G.
Date : 1998.
Title : Bioengineering unstable slopes on Vancouver Island: effective new techniques.
Publication : Proceedings of the 8th Congress of the International Association of Engineering Geology and the Environment
Issue : III
Page(s) : 1987-1991
Abstract
Bioengineering solutions to slope instability have seen considerable success in forest land applications since 1995 in British Columbia. Recent techniques have been developed to perform well under adverse conditions, where older techniques have had less success, or where hard engineering techniques were just too costly. One technique, the modified brush layer, is essentially a brush layer supported by a small (two metre) log or cedar cant, resulting in a terrace. Their design accommodates various unfavourable conditions common to steep slopes on Vancouver Island. Other recent techniques include live pole drains and live gully breaks. Live pole drains provide a bioengineering alternative to dewater slopes using bundles of willow wands strategically laid in shallow trenches. Live gully breaks are the vegetative equivalent of a rock check dam. High success rates and relatively low cost of bioengineering techniques, are resulting in wider acceptance, particularly in the forest sector of British Columbia.
Bibliography of Canadian Geomorphology