Brazil France Germany India Indonesia Iraq South Africa
Sign up for our
free e-newsletter.

Case Studies
Water Management Associations
Winter Drawdown Cause of Rapid Weed Growth
Bolton Lake officials began applying aquatic herbicide Sonar Genesis, or fluridone, in May and once again in June to eradicate the aquatic weeds. This fiscal year $80,000 was spent on investigating and addressing the algae and weed choked lake. The chemical application will cost $52,500 with follow up treatments estimated between $40,000 and $50,000 in each of the next years.

Swimming, boating, and fishing on the lake are prohibited for a 24-hour period after application, but using lake water to irrigate vegetable gardens or other food sources remains restricted for about thirty days after the initial treatment. According to state and federal environmental agencies, the substance is harmful if it’s swallowed, inhaled, or absorbed through the skin. People and their pets should also avoid contact or breathing vapors or spray mist as it’s applied.

Last fall, a report from the environmental consultant George Knoecklein identified the traditional winter drawdowns as the likely cause for the rapid growth of weeds and the toxic algae bloom. It’s routine to lower the water table by at least 3 feet to allow residents to repair docks and submerged walls. But in recent years, the drawdown has more than doubled, by 6 to 10 feet, well below the outlet pipe allowing water to move freely between the middle and lower lakes, the report states.

Click for the full article

About Us Categories From The Gallery   News Updates News Updates

Our Company
Case Studies
Site Map


Aquatic Weed Harvester and Herbicides Dual Approach to Weed Management - Community members, government entities and water quality advocacy groups have partnered to create a plan to address curlyleaf pondweed in the Iowa Great Lakes. The group is considering weed prevention methods, mechanical removal and herbicide application for the 2018 season. The group hopes to emphasize the first two options over herbicide, as aquatic vegetation provides water clarity in the lakes.

© 2010 Copyright Aquarius Systems. All Rights Reserved.   |   (262) 392-2162