Place: Lake Utah, Provo, Utah, USA
Date: 4 September 2020
Background:
Lindon Marina is an 8-acre marina with an estimated depth of 3-6 ft, located at the west corner of Lake Utah, Provo, UT, and is open to Lake Utah at its eastern side (Fig 1). It is subjected to a high frequency of cyanobacterial blooms that drift and concentrate into the marina by daily eastern winds arriving from Lake Utah. A dense scum of toxic cyanobacteria (primarily Anabaena sp.) was identified and treated using Lake Guard® Blue, on September 4, 2020.
Satellite image of Lake Utah, September 4, 2020, processed by Lake Guard® View.
Cyanobacterial intensity levels are depicted as a heatmap, scaled from undetectable/low levels (cold colors, blue) to high levels (warm colors, red). Arrow indicates the position of the Lindon Marina in the lake. Measurements at three locations, two within the marina and one outside, demonstrated successful removal of the toxic cyanobacteria within a few hours following treatment.
Aerial photo of Lindon Marina, September 4, 2020, at 6:00 pm.
A constant flow of turbid water from Utah Lake is observed streaming into the marina. Red circles mark the monitoring points inside the marina (A), at the entrance (B), and outside the marina (C).
Photographs taken before and after the Lake Guard® Blue treatment (at the same corner of the northern side of the marina, facing south). (A) September 4, 2020 at 18:00, prior to the treatment, (B) 15 hours later, on September 5, 2020.
Previous treatments to tackle the blooms in the marina used 400 gallons (approximately 4,000 lb) of a liquid copper-based product (using ~5% copper as ion). BlueGreen's treatment was successfully achieved with only 250 lb of the Lake Guard® Blue product (25.6% copper ion), and the application took less than 1 hr.
Targeted treatment against toxic cyanobacteria leads to an ecological succession of beneficial green-algae that develop in the marina, capable of outdoing the cyanobacterial blooms, thereby substantially delaying the reoccurrence of such blooms.
