Thursday, February 3, 2011

Stream Table: Version 2 – Group 2

New Parameters:

A mixture of sediment, 3 parts sand to 1 part mud (3:1 mix), has been spread 1-2 mm thick on the re-leveled surface of the stream table.  The 3:1 mix will also be what will now be fed into the stream.  This is to help encourage meanders and less stream piracy.

A one degree slope has been given to the new table surface, to encourage meanders to form by decreasing the river profile.

New sediment hopper!  The new hopper is larger and should reduce the periods of time where there is a shortage of sediment entering the stream and discouraging stream piracy.

Water meets drop-off edge as the graded profile drops down to the basin.  This should prevent entrenching of the river. (Over all, we raised the water table significantly.)

A shallow path for the river channel has been carved to encourage it to start its formation in the center of the table, instead of the edge where it has no room to migrate.

Predictions:

Less stream piracy, more meanders.  We feel that the changes my still need tweaking to provide the best results.

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