Water Quality Evaluation of Proposed Twin Valley Lake, Wild Rice river, Minnesota.
Abstract
The water quality of proposed Twin Valley Lake, Wild Rice River, Minnesota, was evaluated with respect to its eutrophication potential and the water quality criteria and standards appropriate for project purposes. Study approaches included review of existing water quality data taken on the Wild Rice River, review of existing data on surrounding lakes, algal bioassay analyses on water samples taken in the Wild Rice River and in one nearby lake, laboratory studies on soil samples taken at the proposed project site, mathematical simulations, and nutrient loading analyses. Water quality data from the Wild Rice River indicated no major water quality problems. Dissolved oxygen averaged 94 percent saturation. Phosphorus concentrations were sufficently high to support nuisance algal blooms, but nitrogen concentrations were low, indicating possible nitrogen limitation. Fecal coli-form counts exceeded 200 colonies/100 ml only during storm events. Algal bioassays were conducted on water samples taken in the Wild Rice River, Dayton Hollow Reservoir, and Ottertail River, the major tributary to Dayton Hollow Reservoir. Chemical analyses on the samples taken in the Ottertail River and Dayton Hollow Reservoir indicated that conditions in the reservoir and river were similar. In all of the samples, the nutrients were in an available form. The bioassays were inconclusive, indicating that either phosphorus or nitrogen could be limiting.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1979
- Accession Number
- ADA074550
Entities
People
- Allan S. Lessem
- Dennis E. Ford
- Kent W. Thornton
- W. Bryan Ford Iii