First, it was enlightening to be provided with a clear definition of small and large hydro facilities in the Hydroelectric Program Development and Assessment webinar, as well as a total amount of power generated by these categories. You informed that the definition of small hydro would have a scope of installed capacity of 10 MW and under, with 30 companies representing 50 facilities generating a total of 120 to 150 MW, and large hydro having a scope of installed capacity of over 10 MW, with 3 companies representing 22 facilities producing a total of 1,000 MW.
The increased number of small hydro facilities making such a small contribution to our electricity grid impacts on multiple Ontario riverine ecosystems, whereas the 22 facilities producing 1,000 MW of power on presumably fewer rivers has a much lower trade-off value. Additionally, larger rivers have a greater capacity to buffer some of the worse effects of hydroelectric.
Photo by Linda Heron