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Wednesday, October 2, 2013

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. 


Does Slope affect erosion & deposition?

In science we are investigating whether different environmental factors affect erosion and deposition of soil.   I have attached photos of the stream tables that were taken during the investigation last week.

Standard Stream table from Science group 1.  Check out the deposition.  Ask your child to identify the alluvial fan.

  
This is the standard stream table from class 2.  Check out the deposition.  Ask your child to identify the location of the canyon. 


This is the canyon on the standard stream table.  Can your child compare and contrast this with the canyon of the sloped stream table? 

  
This is the sloped stream table for group 1.  Compare the location of the alluvial fan with the standard stream table. 



This is the sloped stream table for group 2.  Compare the erosion and deposition with that of a standard stream table. 


Canyon of sloped stream table.  Why does is look so different from the standard stream table?