SLWSS Newsletter for July 2017

The Sylvan Lake watershed includes about 150 square kilometres of land and water that need the attention of the community.

 

State of the Watershed Update

Two summary reports compiled by the Alberta Lake Management Society included Sylvan Lake water quality data collected during our 2016 campaign. Because of the low nutrient concentrations, which are  indicators of the potential for blooms of nuisance algae, Sylvan Lake is now ranked as oligotrophic, the lowest category of lake productivity. As phyto- and zoo-plankton are a critical part of the lake’s food chain we will now watch the condition of aquatic life more closely.

Runoff, Precipitation and Water Balance in 2017

Spring runoff is recorded in this music video of Golf Course Creek peak flow. It is usually an important event for transferring sediment and mobile soil constituents off the land into the lake, however this year’s version did not last long. Cumulative precipitation in 2017 measured at the Alberta Agriculture Hespero weather station has been close to the long term average, as is the level of the lake. Those observations mean that the water balance of the watershed is close to the historic norm.

That is so even with the AEP-regulated emergency practice of pumping crown-owned water from Sylvan Lake to carry treated sewage lagoon effluent through Cygnet Lake and into the Red Deer River. The impact of pumping on the lake volume is small, less than 0.4%, and comparable to the rate of withdrawal caused by natural evaporation rate that typically occurs after July 1.

Monitoring Land Use Changes

We monitor changes in land use with special attention to the Sylvan Lake shoreline. We converted video from the SRD  2007 helicopter survey to a streamable format that can now be viewed easily even on a smartphone. We considered commissioning a new drone survey, however high resolution Google Earth imagery is available for free. We confirm and document those aerial and satellite observations with ground and lake-level investigations to update risk assessments. For example, here is the latest “Juno Beach” landscaping look and a surprising Blissful Beach slope failure.

The Flipside Project

Sometimes we even have fun. We ran a lake water sampling demonstration for elementary school kids at the Flipside after-school clubhouse and simulated an on-the-water campaign on a miniature scale.

Best Stewardship Practices for Boaters

Lake stewardship among boaters seems to fall well down their “to-do” list. Nevertheless, the diligent SLWSS Quiet Enjoyment Initiative team led by Kent Lyle continues to work with the watershed municipalities to educate boaters with brochures and signs about the need for respectful noise abatement. Alberta Environment and Parks (AEP) has also urged boaters to Respect Our Lakes with new signage. Recreational lakes are receiving more AEP attention. The Society provided the Town of Sylvan Lake (TSL) with our opinion on subsidized boat launch access.

Risk to the Lake from the TSL West Area Development

On our watch list is the potential impact of the TSL’s new West Area Development on the quality and quantity of stormwater that runs off that land into Golf Course Creek then discharges into Sylvan Lake through Marina Bay. We evaluated the Water Balance methodology used by BC municipalities to model stormwater flows and concluded that the low probability of excessive lake contamination to cause chronic eutrophication did not justify a Society project expenditure of $10,000.

Wallpapering of the whole watershed with urban development would change the impact assessment considerably. A cumulative effects monitoring program is still required.

Our Contacts with Institutional Friends

We have generally reduced the intensity of relationships with municipalities and government agencies that do not add clear-cut benefits for the Society and our members.

There is a glimmer of hope that the refreshed inter-municipal Sylvan Lake Management Committee might reactivate the Cumulative Effects Management System project. Until it does so, we will remain on the sidelines, tracking changes and watershed health indicators.

Alberta government agencies remain preoccupied with their internal affairs and have not been inclined to offer hands-on assistance to community stewardship groups like ours. So we have reciprocated by inaction, except for sharing SLWSS accomplishments in this report to the 2017 Recreational Lakes community.

Send Us Your Watershed Concerns and Comments on SLWSS Direction and Initiatives

We invite your comments, input and tips on watershed events and practices that you believe increase the risk to the watershed and lake are invited. Smartphone photo evidence is valuable. We like to monitor natural and human risk factors and encourage whistle-blowing, although our QEI team might object to that.

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