Lake Management Plan

go to PGOLID main pageChapter 1 includes an introduction and abstract
Chapter 2 includes the goals of PGOLID
Chapter 3 history covers geological formation to current district projects
Chapter 4 covers watershed characteristics of most of northwest Minnesota
Chapter 5 covers the main watershed around the Pelican Lakes
Chapter 6 covers the minor watersheds that surround Pelican Lake
Chapter 7 describes the types of data collected and why
Chapter 8 reports the data and water quality of inlets and outlets to Pelican Lake
Chapter 9 reports the water quality data for the Pelican Lakes

Chapter 10
Chapter 11 Safety and Buoys

 

Questions?
PGOLID Water Resource Coordinator
218-846-1465, email

Chapter 8: Impacting Streams and Rivers

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Pelican Outlet Chlorophyll-a

Chlorophyll a is the pigment that makes plants and algae green. Chlorophyll a is tested in lakes to determine the algae concentration or how "green" the water is. Chlorophyll a concentrations greater than 10 ug/L are perceived as a mild algae bloom, while concentrations greater than 20 ug/L are perceived as a nuisance. explanation of Chlorophyll-a

Chlorophyll-a is measured in the Pelican Outlet to see how much algae is leaving the lake. As you can see from the graphs below, algal concentrations are generally highest in August when the conditions are ideal for algae growth (bright sun, hot, calm weather). The Chlorophyll-a has only reached the 10 ug/L mark (indicating a mild algae bloom) 3 times since 2001. Chlorophyll-a concentrations have never reached 20 ug/L, which would indicate a nuisance algae bloom.

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