1. RICE CREEK CHAIN OF LAKES TMDL

2. PELTIER LAKE TOTAL PHOSPHORUS MONITORING DATA

3. PELTIER LAKE TOTAL PHOSPHORUS MONITORING DATA, 2006 outlier removed

4. PELTIER LAKE CHOLORPHYLL MONITORING DATA

5. PELTIER LAKE SECCHI DEPTH MONITORING DATA

6. PELTIER LAKE 1991 – 2006, growing season

7. PELTIER LAKE DISSOLVED OXYGEN

8. PELTIER LAKE TOTAL PHOSPHORUS - SURFACE VS BOTTOM

9. CENTERVILLE LAKE TOTAL PHOSPHORUS MONITORING DATA

10. CENTERVILLE LAKE CHOLORPHYLL MONITORING DATA

11. CENTERVILLE LAKE SECCHI DEPTH MONITORING DATA

12. CENTERVILLE LAKE 2000 – 2006, growing season

13. CENTERVILLE LAKE DISSOLVED OXYGEN

14. CENTERVILLE LAKE TOTAL PHOSPHORUS - SURFACE VS BOTTOM

15. IN-LAKE MODELING  Bathtub: Reservoir water quality model developed by the U.S. Army Corps of Engineers  Includes models for TP, chlorophyll-a, and Secchi transparency  Steady-state water and nutrient balance calculations in a spatially segmented hydraulic network; accounts for advective and diffusive transport and nutrient sedimentation

16. MODEL STRUCTURE Peltier Lake Centerville Lake Upper Rice Creek Clearwater Creek Peltier direct drainage Hardwood Creek Centerville direct drainage Direct precip Direct precip Internal

17. PRECIPITATIONPRECIPITATION

18. MODEL SELECTION  Phosphorus: Canfield & Bachman, lakes (option 8)  Chlorophyll-a: P, light, T (option 2)  Secchi transparency: vs. Chl-a and turbidity (option 1)

19. MODEL CALIBRATION  Phosphorus calibration coefficient - adjusted from 1.0 to 0.6 for Peltier Lake  Chlorophyll-a calibration coefficient - adjusted from 1.0 to 1.5 for both Peltier and Centerville Lakes  Internal loading rate adjusted to further calibrate model

20. INTERNAL LOADING  Sediment data

21. CALIBRATION - 2001

22. VALIDATION - 2004

23. PELTIER LAKE TP LOADS Watershed loads represent 48% of total load

24. CENTERVILLE LAKE TP LOADS