Effects of Changes in Reservoir Operations on Water Quality and Trophic State Indicators in Voyageurs National Park, Northern Minnesota, 2001-03

摘要

The purpose of this report is to describe effects of changes in reservoir operations on water quality and trophic state in Voyageurs National Park. Data collected in 2001-03 are described and compared to data collected in 1977-83, 1985, and 1986. This report will attempt to answer the following questions: (1) Are changes in primary productivity and nutrient enrichment, relative to baseline data, taking place in Kabetogama Lake and Black Bay, post January 2000 rule-curve change$ and (2) Are changes in primary productivity and nutrient enrichment in Kabetogama Lake and Black Bay greater than changes at reference sites in Sand Point Lake, Namakan Lake, and Rainy Lake.