Pond management

Asked July 26, 2020, 11:33 AM EDT

I have a half acre size pond but would like to confirm the size and also develop a schedule of herbicide applications to control milfoil and algae growth. Thank you.

Allegan County Michigan

4 Responses

Hi,

The best way to confirm the area of you pond is to use one of many online mapping tools such as Google Earth or Acme (http://acme.com/planimeter/). Either will give you the perimeter and area of your pond. If the pond is a standard shape you can also just use formulas such as circle (pi*radius squared) or rectangle (length x width). To get pond volume, you'll need to multiply the area times the average depth. A somewhat quick way of calculating average depth is to make many measurements along two transects (width and length) of the pond and then calculate an average. Here's a web site that does the overall calculations for you, but you still need to determine the average depth: https://concalculator.com/pond-volume-calculator/#Irregular_Pond.
For the herbicide application, make sure you follow the label. Hope this helps you find the dimensions for your pond.


I thank you for pond size calculators. I know this is essential to determine algaecide applications. Can the extension service recommend algaecides and other treatments for pond maintenance?

Hi:
Pond maintenance is so dependent on what one wants from the pond. There's no one answer fits all. Michigan's EGLE has a lot of information on Aquatic Nuisance Control at https://www.michigan.gov/egle/0,9429,7-135-3313_3681_3710---,00.html, including various chemicals that can be used for removing algae and other aquatic plants. Two good resources for Pond Management are Michigan Extension's: Managing Michigan Ponds for Sports Fishing at https://shop.msu.edu/product_p/bulletin-e1554.htm, but it costs $5.00 or Ohio's DNR's Pond Management at https://freshwater-aquaculture.extension.org/wp-content/uploads/2019/08/OhioPondManagement.pdf which is free.

Thank you! I’ll look into the website and let you know.