How do floods affect erosion and deposition?

We conducted another stream table investigation to determine how floods affect erosion and deposition of soil.  We set up two stream tables, one standard and one flood, to compare the results.

Stream tables before the investigation. 

Group 1 
Below are the stream tables for group 1.  Which table is the flood environment and which one is the standard table?  How do you know? 

Group 2:  Below are the stream tables for group 2.  Which table is the flood? 

 

Below is the canyon formed by the flood.  

Slope & Flood Investigation- Group 2 had some extra class time, and the kids wanted to investigate the effects of a flood on a sloped stream table.