WEIR READY - FAQ
Frequently Asked Questions
Last updated October 2020 - stay tuned for updates.
Here are some of the questions received by the Cowichan Watershed Board, with replies from Tom Rutherford (email@example.com).
Also check cowichanlakeweir.ca for current information.
- The changing climate means that low flow conditions are occurring about 80% of the years now where they used to occur much less frequently. This means that years of poor reproductive success for salmon are common now instead of just occasional.
- Land use over the past 150 years has affected the resilience of the river’s ecosystems, including changes to the riverbed and gravel deposition. Pools important for fish to shelter in are fewer and more shallow. Riparian habitats have been logged, invasive species have moved in, other wetland and side-channel habitats have been lost to property developments in the flood plain and diking.
- This all means that habitat features that were capable of supporting fish at low flows 100 years ago are now diminished.