Thursday, February 24, 2011

Setup #3, Test 2 - Group 1

Feb 18, 2011
We began a new test today by dredging a new channel with a bend at the beginning to help with our sinuosity. We dug the channel with our fingers.

Initial results: With our larger, deeper channel our water flow became restricted to the channel and is no longer saturating the flood plain. Sediment is being transported. Sand bar developed on the inside of the channel. There are small amounts of sediment now being deposited on the inside of the river bends.
The bend we created. Note the sand bar developing in the stream.
 Feb 23, 2011
It seemed as our system has reached a point of equilibrium. Cut banks have developed on the outside of our bends. Thalwegs formed. There is no more flow of sediment flowing at this time,  which we need in order to develop our stream. Our sand bars are still intact.

We began to input more sediment (70 grit sand). A sand wave began to move through our stream.  We are currently working on a new way to input our sediment.

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