Fluvial Geomorphology

Hydraulics Field Observation

Module 5 Field Observations: Hydraulics

See Corresponding Learning Module

The Assignment

Go to a local stream or river with flowing water (please do not get in the water for safety purposes). Build as web page with the following:

  1. Provide a Location Map
  2. Provide a Field Map Sketch (Planform) – Denote on it where you record remaining observations ( 3 through 6)
  3. Take some oblique photos of the channel and annotate:
    1. Arrows representing flow direction (magnitude by length)
    2. Find examples of:
      1. Convergent flow
      2. Divergent flow
      3. Uniform flow
    3. Flow Separation, Flow Seam, Reattachment Zone, Shear Zone Type (Eddy vs. Wake)
    4. Use Table 5.1 to identify surface flow-types you see present
  4. Estimate the discharge in the channel (what is average depth? What is average velocity (use orange peel method)? What is flow width? Q=VA)
  5. Draw a rough cross section (use approximate scale, no –need to wade in channel)
  6. Find at least one example of a hydraulic jump. Record video and identify :
    1. The upstream subcritical flow
    2. The transition to supercritical flow
    3. The hydraulic jump itself
    4. The downstream subcritical flow