Citation | Greenbank Environmental Inc. 2011. Alouette Project Water Use Plan: Allouette Water Temperature. BC Hydro. |
---|---|
Organization | BC Hydro |
URL | https://www.bchydro.com/content/dam/hydro/medialib/internet/documents/planning_regulatory/wup/lower_mainland/2011q2/alumon-5_yr3_2011-04-01.pdf |
Abstract/Description or Keywords | Water temperature in the Alouette River, downstream of the Alouette Dam continues to be a concern for BC Hydro, environmental agencies and stakeholders. In response to these concerns and other potential low-flow issues, BC Hydro changed the operation of the Alouette Dam by fully opening the low level outlet (LLO) in 1996 to increase the minimum flows. It has been agreed by the fisheries technical committee (FTC) that the increase in flows has improved the temperature conditions, however, uncertainties regarding the extent potential of high water temperature impacts remain. To address these uncertainties, BC Hydro has commissioned a water temperature monitoring program to measure water temperatures throughout the watershed, including the reservoir, to better assess the possible range of operational changes that can be taken to mitigate for measured impacts. This Year 3 report summarizes the 2010 temperature data and provides comparisons to earlier years. Water temperatures in the plunge pool just downstream of the Alouette Dam generally ranged from a low of about 4°C in December and January and generally increased from February with peak temperatures observed in late August and early September. Water temperatures did not reach lethal levels for salmonids. Water temperatures reached a high of 19°C to 22°C from 2000 through 2010. Weekly mean water temperatures were highest at the end of August and were near 18°C in the summer of 2010. |
Information Type | report |
Regional Watershed | Lower Fraser |
Sub-watershed if known | Alouette River |
Aquifer # | |
Comments | |
Project status | complete |
Contact Name | |
Contact Email |