Riparian Windthrow Northern Vancouver Island

12/04/01


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Table of Contents

Riparian Windthrow Northern Vancouver Island

Study objectives

Methodology

Visible stream effects

Stream class vs % windthrow

% Windthrow distribution

Windthrow penetration pattern

Windthrow severity index: (WSI = %WT*Penetration Distance)

Single vs double-sided strips

Treatment plus leave strip effects

Windthrow vs width (1-sided strips)

Windthrow vs width (2-sided strips)

Windthrow vs boundary exposure

Wind Exposure Index WEI = (BE 1 rank) + (BE 2 rank)

Windthrow vs exposure index

Windthrow vs valley axis

Windthrow vs boundary geometry

Windthrow vs rooting depth

Windthrow vs soil drainage class

Windthrow vs dominant tree species

Windthrow vs height class (map)

Windthrow vs stand age

Untreated and feathered riparian strips

Best Predictors

Summary

Summary continued ...

Summary continued ...

Some options for high risk areas

Options for high risk areas cont’d

Some Preliminary Observations on Retention Silviculture

Observations on retention

Observations on retention

Observations on retention

Author: Terry Rollerson, M.Sc., P.Geo., Senior Geoscientist

Email: trollerson@golder.com

Home Page: http://www.for.gov.bc.ca/vancouvr/research/research_index.htm

Other information:
Presentation at Windthrow Workshop during the Coastal Forest Site Rehabilitation Conference, Nanaimo, Nov. 2001.

Download presentation source