1. Healthy Streams: What makes a healthy stream?

2. Scientists observe, measure, record, analyze, and make conclusions

3. What is turbidity?
Why is turbidity important for a healthy stream?

4. Using the Slyter Stick to take a sample

5. Dr. William Trush, River Ecologist McBain and Trush, Arcata CA
If the turbidity in a stream reaches 20 NTU’s (Nephelometric Turbidity Units) for 20 straight days, the forming salmonid will not be able to see its food, will not grow to its full length, and will be unlikely to survive into adulthood.

6. Turbidity Data all 5 Schools

7. Data Report Covers a Slice of Time
Nov.22, 2014
Dec.6, 2014

8. Water Temperature
Why is water temperature important to a healthy stream?

9. EPA Recommended Temperature Thresholds to Protect Salmonid species and Trout
Fish are exothermic (e.g., physiologically controlled by surrounding water temperature levels). As such, water temperature controls all life stage needs.
Adult migration F (18-20 C)
Incubation 55 F (13C)
Juvenile Rearing F (16-18 C)
Smoltification F (14-15 C)
Prolonged exposures of Chinook salmon to water temperatures above about 20°C (68 F) can result in a number of adverse effects, depending on the life stage (Moyle et al ).
In northern California, both Welsh et al. (2001) and Hines and Ambrose (1998) found that coho salmon juveniles did not persist where the floating weekly maximum temperature exceeded 18.3° C (65 F) for any length of time. 

10. What is the most prevalent fish in the Van Duzen and Eel Rivers?

11. Data Temperature 5 School and 3 Locations

14. Grizzly Creek Dec.6th, 2014

15. What is ph
Why is ph important to a healthy stream?

16. Redway Beach

17. pH rises and falls during the course of a hydrologic year
The North Coast Water Quality Control Board objectives for pH in the Van Duzen River are 6.5 to 8.5.

18. pH Eel River, Van Duzen River, Grizzly Creek

20. Fruits and vegetables can raise your bodies pH.
The pH scale ranges from 0 to 14; pure water has a neutral pH of 7. Acids range from 0 to 7, and bases range from 7 to 14 on the scale. The website Alkalize for Health reports that human blood maintains a steady pH of 7.4, making it slightly alkaline.

21. Science on the Eel River

22. Finding Macroinvertebrates

23. Science in Action

24. Collaborative Learning Thanks Redway School