Drought Response
Drought Response in the Cowichan Valley
Koksilah River Low Flows
Low water levels are a recurring challenge in the Cowichan Valley. In recent years, summer flows in the Koksilah River have reached critically low levels precisely when water demand peaks. This situation poses a significant threat to the survival of both resident and anadromous salmonid species, jeopardizing the entire aquatic ecosystem.
As a result, Cowichan Tribes and the Province have begun work on long-term solutions through a community-based Xwulqw'selu Watershed Planning Process. In addition, multiple organizations have formed a short term drought response working group to improve communication and understanding between water users, regulators, researchers, and others. Read more.
Cowichan Lake Weir - Weir Ready!
As part of the efforts to mitigate the effects of drought, significant work is underway to rebuild the Cowichan Weir. This project aims to increase the weir's capacity to store water during the winter months, which can then be released during extended dry spells, ensuring a more consistent flow in the river. This enhanced management strategy is crucial for maintaining the health of the aquatic ecosystem and supporting the survival of fish species during periods of low summer flows. Read more.
Cowichan River Fish Kill - Community Response
In the summer of 2023, Cowichan Lake suffered a devastating fish die-off. Lower water levels, rising temperatures, and altered water chemistry combined to create lethal conditions for aquatic life. This resulted in the loss of 84,000 steelhead juveniles and countless numbers from other fish species, a devastating blow to the river's ecosystem. The unprecedented die-off underscored the urgent need for improved environmental management and proactive measures to protect the fragile aquatic habitats.
What's the Latest?
A rigorous monitoring program has been implemented as part of a collaborative effort to prevent another fish mortality event like the one observed in the summer of 2023.
Water quality results gathered through this program are utilized by these partners to make informed decisions on necessary responses to protect fish health and their habitat.
To achieve this, continuous monitoring equipment has been installed at various locations in both the upper and lower sections of the river. This equipment assesses daily fluctuations in water temperature, pH, and dissolved oxygen levels. Additionally, grab samples are collected every two weeks at several sites along the river to measure various parameters, including nutrient levels and E. coli concentrations.
Key partners in this initiative include Cowichan Tribes, BC Fisheries, DFO, CVRD, the Town of Lake Cowichan, the Municipality of North Cowichan, and the Cowichan Watershed Board.
Resources
What to do if you see a dead fish? Let everyone know! Contact:
- The Federal Government at "Observe Record Report" (ORR): DFO.ORR-ONS.MPO@dfo-mpo.gc.ca / 1-800-465-4336
- The Provincial Government at the RAPP line: 1-877-952-RAPP
- Cowichan Watershed Board: admin@cowichanwatershedboard.ca