Short Course on Gullies and Streams

12/10/01


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Table of Contents

Short Course on Gullies and Streams

Objectives

Debris definitions

Water transport of woody debris

Debris flow (or debris torrent)

History of GAP

Section 2: Water Transport Potential

Water transport potential assessment

No slash movement

No slash movement

Little slash movement

Little - moderate slash movement

Moderate slash movement

Moderate slash movement

Extensive slash movement

Severe slash movement

Severe slash movement

Severe slash movement

Old assessment method

Van. Island & Boston Bar Slash in Streams Studies

Vancouver Island study location

Boston Bar study location

Slash in Streams Study Methods

Disturbance

Severe disturbance

Predictor variables

Results

PPT Slide

PPT Slide

PPT Slide

PPT Slide

PPT Slide

PPT Slide

PPT Slide

PPT Slide

PPT Slide

Significant predictors of channel disturbance

Channel width and size of woody debris moved

Jam volume and width: Nitinat

Jam volume and width: Anderson

Sediment size and woody debris size moving

Jam volume and sediment size: Nitinat

Jam volume and sediment size: Anderson

What about gradient?

Useful predictors of water transport potential

Water transport assessment and cleaning strategies

Author: Tom Millard, M.Sc., P.Geo.

Email: Tom.Millard@gems8.gov.bc.ca

Home Page: https://www.for.gov.bc.ca/rco/research/vanpublicat.htm

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

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