Water quality of Alimagnet, Farquar, and Long Lakes in Apple Valley, Minnesota
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Abstract
Alimagnet, Farquar, and Long Lakes, in Apple Valley, Minnesota, were sampled from 1973-79 to determine their physical and chemical characteristics. A storm-sewer inlet to Alimagnet Lake was also sampled during two storms in 1978. The 1976-77 drought caused a more noticeable effect on the quality of the lakes than any other factor. Chloride concentrations were 10 to 15 milligrams per liter before the drought, but increased 2 to 4 times during the drought. Dissolved solids reacted similarly. Dissolved oxygen and pH were governed mainly by biological activity. In February 1977, dissolved-oxygen concentration was less than 0.5 milligrams per liter in the three lakes. Ratios between mean total nitrogen and mean total phosphorus ranged from 22:1 to 26:1. Trophic-state indices indicate that the lakes are eutrophic. Blue-green algae dominated the phytoplankton populations. Storms sampled at a storm-sewer inlet to Alimagnet Lake showed higher concentrations of chromium, copper, nickel, and zinc than of lead, arsenic, cadmium, and mercury. Total phosphorus for the September 1978 storm had a concentration of 1.7 milligrams per liter, which means that approximately 29 pounds entered the lake during the 5.5-hour sampling period.
Study Area
Publication type | Report |
---|---|
Publication Subtype | USGS Numbered Series |
Title | Water quality of Alimagnet, Farquar, and Long Lakes in Apple Valley, Minnesota |
Series title | Water-Resources Investigations Report |
Series number | 81-40 |
DOI | 10.3133/wri8140 |
Year Published | 1981 |
Language | English |
Publisher | U.S. Geological Survey |
Publisher location | St. Paul, MN |
Contributing office(s) | Minnesota Water Science Center |
Description | iv, 38 p. |
Country | United States |
State | Minnesota |
City | Apple Valley |
Online Only (Y/N) | N |
Additional Online Files (Y/N) | N |
Google Analytic Metrics | Metrics page |