Ministry of Environment
EcoCat:The Ecological Reports Catalogue
EcoCat Image
 

Report: EFFECTIVENESS MONITORING OF STOLTZ BLUFF STABILIZATION WORKS, COWICHAN RIVER-Final Report

Report Documents
 
Map Plotfiles
  • No files of this type available
 
Data Files
  • No files of this type available
 
Digital Map Files
  • No files of this type available
 
Image Document
  • No files of this type available
 
Video Files
  • No files of this type available
 
All Documents

  • No files available

Contact

  • If you have any questions on the information presented, or require additional report data or attachments, please contact the Report Contact

 
The impact of fine sediments on salmonid egg incubation habitat in the Cowichan River has been an ongoing concern among members of the Cowichan Stewardship Roundtable. The concern relates to the impact of fine sediments, typically generated from excessive bank erosion, infiltrating the interstices of the riverbed spawning gravel and reducing egg-to-fry survival

Author:  Marc Gaboury, Dave Robichaud, LGL Limited

Date Published:  Jun 2012

Report ID:  41251

Audience:  Government and Public

The impact of fine sediments on salmonid egg incubation habitat in the Cowichan River has been an ongoing concern among members of the Cowichan Stewardship Roundtable. The concern relates to the impact of fine sediments, typically generated from excessive bank erosion, infiltrating the interstices of the riverbed spawning gravel and reducing egg-to-fry survival. Although sediment inputs from naturally eroding banks are apparent along the mainstem, several sites stand out as generating large volumes of fine sediments to the river. For example, Stoltz Bluff has been identified as the most significant single source of fine sediments to the river (LGL and KWL 2005; KWL 2005). The sediment contribution from Stoltz Bluff was estimated at ~10,000-28,000 m3 annually between 1993 and 2004. Suspended sediment from Stoltz Bluff also represented from 35-45% of the total suspended load measured at Vimy Road, ~15 km further downstream. To address this significant sediment source, rehabilitation measures were constructed at Stoltz Bluff in 2006 to stabilize the toe of the Bluff thereby reducing sediment inputs from this chronic erosion site.

Report Type
  Fish and Aquatic Habitat Information
 
Subject
  Region - Vancouver Island
  Fish and Fish Habitat - Enhancement Assessment
 


Warranty Disclaimer

This information is provided as a public service by the Government of British Columbia, Box 9411, Victoria, British Columbia, Canada V8W 9V1. This Web site and all of the information it contains are provided "as is" without warranty of any kind, whether express or implied. All implied warranties, including, without limitation, implied warranties of merchantability, fitness for a particular purpose, and non-infringement, are hereby expressly disclaimed. Limitation of Liabilities Under no circumstances will the Government of British Columbia be liable to any person or business entity for any direct, indirect, special, incidental, consequential, or other damages based on any use of this Web site or any other Web site to which this site is linked, including, without limitation, any lost profits, business interruption, or loss of programs or information, even if the Government of British Columbia has been specifically advised of the possibility of such damages.


 

COPYRIGHT | DISCLAIMER | PRIVACY | ACCESSIBILITY