1. How Do We Measure Water Quality????

2. Water Quality Chemical Characteristics Biological Characteristics
Physical Characteristics

3. Chemical Characteristics
Dissolved Oxygen
Nitrogen
Phosphorous pH
Alkalinity

4. Dissolved Oxygen

5. Dissolved Oxygen

6. Fish Kill

7. pH

8. Acid Rain

11. Alkalinity

12. Nitrogen and Phosphorous

13. Eutrophication

14. Good Water Quality Dissolved Oxygen: >6 ppm pH: Neutral
Alkalinity: 100 – 200 ppm
Nitrogen and Phosphorous: <.1 ppm

15. Biological Characteristics
Fish
Algae
Rooted Aquatic Plants
Bacteria
Benthic Macroinvertebrates

16. Benthic Macroinvertebrates Think Small!!!!!

17. Benthic Macroinvertebrate Sampling

18. Stonefly Larvae

19. Mayfly Larvae

20. Caddisfly Larvae

21. Benthic Macroinvertebrates as Water Quality Indicators
Mayflies
Stoneflies
Caddisflies

22. Physical Characteristics
Temperature
Local Land Use Activities
Stream Bank Erosion
Stream Bottom
Flow

23. Different Types of
Fish Do Better in
Different Water
Temperatures

24. Warm Water Fish
Blue Gills

25. Stream Bank Erosion

26. Stream Bottom
Characteristics

27. Measuring Stream Flow

28. Measuring Stream Flow
Width X Depth X Feet per Second = Cubic Feet per Second (cfs)

29. Watershed Scientists What Do We Do?
Take Water Quality Measurements
Sample for Macroinvertebrates
Take Water Temperature
Figure Out the Stream Flow
Look for Signs of Pollutants
What Do All of These Say About Water Quality?