Friday November 28th, 2025
10:00-12:00
Via Microsoft Teams
Our fall Network meeting was attended by seventeen participants from groups across the east coast of Vancouver Island, including many returning participants of the CFMN program, and a several new folks interested in becoming involved.
The topic of our 2025 fall meeting was hydrometric data analysis and interpretation.
We discussed a recap of the program in 2025, including new equipment and resources, a new station installation, and a summary of all site visits and measurements conducted in 2025. A big thank you to everyone involved in the program for your dedication and efforts toward flow monitoring this year – we’ve had over 103 site visits so far!
We also touched on high flow safety and some important points to keep in mind as we transition to winter monitoring conditions.
Provincial hydrometric specialist Sarah Hardy gave a presentation on common types of flow data analysis, such as examining MAD (mean annual discharge) and MDD (mean monthly discharge), percentiles, and return period. She also gave examples of analyses that have been done on data collected at CFMN stations.
Following Sarah’s talk, we had a discussion period to allow opportunity for questions and comments. A few questions were asked about how data gaps in a flow record are handled/interpreted, how precipitation data is used to interpret flow data, and how and why stage is reported in Aquarius relative to a local assumed datum. One participating group also shared information on a new project they are initiating to examine how changes in streamflow relate to changes in available fish habitat.
Sarah continued with a presentation looking at uncertainty in flow data. She showed some examples of rating curve development from CFMN stations, and spoke about ways to evaluate the uncertainty/confidence level in hydrometric data records, particularly when looking at RISC Grade-U (unknown) data.
It was also noted that an auto-filter for the Community Flow Monitoring Network is now available on the Aquarius WebPortal to make searching for our stations easier. See the image below for how to find it.
Many thanks to everyone who took the time to attend this meeting, and a big thank you to Sarah Hardy for her excellent presentation and contribution to the meeting, and all others who took the time to speak.
Other links to follow: