USGS - Water Resources Division, Illinois District

(1) Acquire water use data for Illinois as a basis for present analysis and future projections of water use. (2) Develop and maintain a water use data base responding to user needs. (3) Establish methods of estimating water use. Keywords: Existing,Ground water,Management,Rural,Surface water, Urban,Water level.

The fish stocks of the four dominant water bodies of Voyageurs National Park Rainy,Namakan,Sand Point and KabetogamaLakes have been subjected to many of the same anthropogenic factors that have affected the nearby GreatLakes.The most recent perturbation was the invasion of rainbow smelt in Rainy and Namakan Lakes.Rainbow smelt,which colonized numerous areas in the upper Rainy Lake watershed after being introduced by humans,first appeared in Rainy and Namakan Lakes in 199 .Based on studies conducted elsewhere,the rainbow smelt may have a significant effect on the parks aqu

The fauna and flora of Isle Royale National Park represent a unique assemblage of species from eastern and western glacial refugia that have seemingly escaped some of the successional changes that characterize the eastern and western regions. However; the genetic variability and relatedness of species in the fish communities are not known. Walleye, which occur in only two lakes on Isle Royale, is one species where such questions exist.

Collect surface-water data sufficient to satisfy information needs for (1) assessment of water resources, (2) operation of resevoirs on industries, (3) forecasting (4) disposal of wastes and pollution controls, (5) assessment of streamwater quality, (6) compact and legal requirements, and (7) research or special studies. To collect data necessary for analytical studies to define, for any location, the statistical properties of , and trends in, the occurrence of water in streams and lakes for use in planning and design.