1. Poor/Glide and Riffle/Run
Deeper pool = better pool
Deeper riffles & runs = better quality
Diversity of current velocities available
Mophology of riffles/pools affects characteristics and quality

4. Riffle-Pool Morphology

5. Current Velocities in Streams
Fast/Very Fasts
Fast
Eddy
Moderate
Slow

7. QHEI Riffle/Run Metric
If best areas < 5cm or no riffle, metric scores a zero

8. Riffle/Run Characteristics
What is depth of better riffle and run areas?
Measure depths in areas that are clearly run or riffle
Are substrates coarse or fine?
Are substrates in riffle/run area embedded?

9. Darters and Riffle Depth

10. Calculating Stream Gradient: “Map Gradient”
Locate site on topo map
Find upstream and downstream contour line crossings
Calculate miles between contours
E.g. 640’ – 630’/1.5 miles = 6.67’/mile

11. Large, Fast, Deep Riffles
Low Embeddedness