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Water Quality of Alignment, Farquar, and Long Lakes in Apple Valley, Minnesota

Description: 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. Tropic-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 pf 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.
Date: June 1981
Creator: Have, Mark R.; Payne, Gregory A. & Ayers, Mark A.
Partner: UNT Libraries Government Documents Department

Water Quality of Rogers Lake, Dakota County, Minnesota

Description: This report determines the possible effects of constructing an interstate highway on the nearby Rogers Lake in Dakota County, Minnesota by testing multiple water and bed material samples. This report also includes several tables and other figures.
Date: January 1980
Creator: Have, Mark R.
Partner: UNT Libraries Government Documents Department

Water Quality of Four Lakes in Lakeville, Minnesota

Description: From abstract: This report presents data collected from four lakes in Lakeville, Minnesota to determine water-quality characteristics and evaluate "changes that may occur in the lakes because of urbanization." It contains a map, graphs, tables, and a glossary.
Date: July 1980
Creator: Tornes, Lan H. & Have, Mark R.
Partner: UNT Libraries Government Documents Department

Effects of Urbanization on the Water Quality of Lakes in Eagan, Minnesota

Description: This report uses data collected from seventeen lakes and ponds in Eagan, Minnesota from 1972 through 1978 to determine the effects of urbanization on water quality. It contains a map, graphs, and tables.
Date: August 1980
Creator: Ayers, Mark A.; Payne, Gregory A. & Have, Mark R.
Partner: UNT Libraries Government Documents Department