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You are here: Home / Twinned Watersheds Project / Fish Habitats

Fish Habitats

Twinned Watersheds Project:

Fish Habitats

Salmon are a good measure of watershed health.

This project enabled robust research, lead by Geomorphic Consulting in collaboration with local scientists and field crews, to determine the necessary water levels and habitat conditions for salmon and other species to thrive, or at least survive, in the Koksilah and Chemainus Rivers. 

Throughout the summer of 2021, as water levels dropped, field crews walked the two rivers to monitor how various habitats were impacted by declining flow rates.  Pool, riffle, and glide habitats were inventoried to see if there was enough water for fish – specifically juvenile Coho and Steelhead fry, and returning adult Chinook.

See the Documents section on this page to  download the peer reviewed study results or an Executive Summary. 

Access the full Habitat Atlas that was generated by this project here, or see the map-sets on this page.

Photo Gallery

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Videos

DOCUMENTS

Posted on August 18, 2022

Video: Biologist Cheri Ayers describes the Koksilah-Chemainus "Twinned Watersheds" Project

Cheri Ayers is a local fish biologist who grew up on the Koksilah River, and…

Posted on April 15, 2022

Twinned Watershed Project: Executive Summary – Koksilah River Environmental Flow Assessment

Water holds a prominent place in culture, science, policy, community values and recreational pursuits. Yet,…

Posted on April 5, 2022

Twinned Watershed Project: FULL REPORT - Xwulqw'selu/Koksilah River Environmental Flow Assessment

Over the past number of years water has been elevated to the centre of planning,…

Check Out Other Parts of the Twinned Watersheds Project

Tim Kulchyski, Cowichan Tribes member, Fisheries biologist, Koksilah River. Taylor Roades
Tim Kulchyski, Cowichan Tribes member, Fisheries biologist, Koksilah River. Taylor Roades
INDIGENOUS FLOWS
Koksilah Ancient Forest, by Arcas Media
Koksilah Ancient Forest, by Arcas Media
RIPARIAN PLANTS
Stth'aqui the Big Dancing Fish meets friend, MLA Sonia Furstenau.
BIG DANCING FISH

Latest News

  • [Times Colonist] Comment: Let’s give a dam for Vancouver Island’s only heritage river
  • [The Discourse] Local advocates look ahead to a healthier year for Somenos Lake
  • Why BC Needs Watershed Boards
  • [Cowichan Valley Citizen] The 14th annual Lower Cowichan River clean up is back on Aug. 25

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The Cowichan Watershed Board (CWB) gratefully acknowledges the financial support of the above organizations.