Stream Draft

For the stream chapter of your book you should be reporting on the process, the results, the class results and our overall findings.
Things to consider for the process of collecting data/the data we were collecting:

• length of the section
• width of the section in multiple locations
• depth of the water flow in multiple locations
• Surface Velocity in m/s
• Volume:  We used the length x avg width x avg depth to get the volume.  Assuming all of your measurements were in meters your units will be cubic meters.  Remember that one meter = 3.28 feet.  Be careful to consider if your measurements were in tenths of feet (long orange cased tape) or feet and inches (meter stick, small measuring tape)
• Drop:  We used a water level to measure the change in elevation between the top of your section and the bottom of the section.  By measuring the distance between the water level in the tube and the surface of the water at two locations, then finding the difference between those measurements, you have measured how far the surface of the stream has dropped.
• Flow:  We used our volume measure and our surface velocity to get a measurement of flow in cubic meters per second.  
• Bigger questions to consider, perhaps using the group data:
• Why is surface velocity a flawed measure of flow?
• How are surface velocity and depth related?
• How are surface velocity and drop related?
• Why is flow in cubic meters per second the most accurate picture of the stream?  Explain how it is so that while surface velocity can differ from section to section that flow is constant.
• What are possible sources of error in our data?
• Also consider the process of mapping:
• How did you come up with the scale?
• What was the purpose of the guideline?
• What other techniques did you use?

More tomorrow, but that should keep you busy.  Feel free to post comments, etc.

Mr. H