1. Dr. Martin T. Auer Professor of Civil & Environmental Engineering Michigan Technological University Houghton, Michigan 49931 Prepared for IAGLR 2001 Green Bay, Wisconsin

2. 150 120 90 60 30 0 0 20 40 60 80 120 100 120 100 80 60 40 20 0 40 60 80 120 100 0 5 10 15 20 25 30 0 20 40 60 80 120 100 0 8 6 4 2 0 0 20 40 60 80 120 100 10 Distance from Fox River Mouth (km) TP (µgP/L)Quota (P, %POC) Chl (µg/L) Bottom Aphotic Photic

3. 100 80 60 40 20 0 0 40 60 80 100120 Distance (km) Summer Minimum D.O. Sat. (%) 0-1 1-2 2-3 > 3 SOD (gO 2 m -2 d -1 )

9. 360360

10. Point Sources 35% Non Point Sources 65%

11. Non Point Source Model Water Quality Model Trophic State Land Use Soil Texture TP UALs TP Load

12.  Soil Texture Land Use Area Soil Texture Land Use UAL Lower Fox, River Lakes, and Lake Winnebago Watersheds

13. Empirical Relations for Trophic State = ƒ (Total P) V dP dt WQPEPPVkP adj  '()

17. LaSalleThe Griffon

18. Ray Canale Anita Barth Eye Larry Londo Tom Heidtke Bob Gardiner Dennis Rosnowski Mark Kieser Bob Schuurmans Auer, M.T. and R.P. Canale. 1986. Mathematical modeling of primary production in Green Bay (Lake Michigan, USA): A phosphorus and light ‑ limited system. Hydrobiological Bulletin, 20( 2 ): 195 ‑ 211. Auer, M.T., Kieser, M.S., and R.P. Canale. 1986. Identification of critical nutrient levels through field verification of models for phosphorus and phytoplankton growth. Canadian Journal of Fisheries and Aquatic Sciences, 43(2): 379 ‑ 388. Canale, R.P. and M.T. Auer. 1987. Personal computers and environmental engineering. Environmental Science and Technology, 21(10): 936 ‑ 942. Heidtke, T.M., Auer, M.T. and R.P. Canale. 1986. Microcomputer models and water quality: Access for decision ‑ makers. Journal of the Water Pollution Control Federation, 58(10): 960 ‑ 966. Funded by U.S. EPA MED, Duluth, Minnesota