Margaret S. Petersen
Which are the toughest kind, right?
When it involves multiple agencies, yes.
A:
So the multi-purpose reservoirs are the ones that present the largest problems?
At the same time they're the biggest reservoirs so they will be the last to have the problem.
A:
It's the small reservoirs for flood control, water supply, or power that are facing the problem
now.
Vane Dikes as an Innovative Approach
Well, let me go back and ask you about the Arkansas. Were there any innovative approaches
that you adopted in the Little Rock District to solve some of these channel stabilization and
bank stabilization problems?
One thing we did was to try low sills angled to the flow that are vane dikes. They do not
A:
extend up through the water surface. They're simply there to keep the channel open in the
crossings between the deep part of the channel on the outside of successive bends. These
low vanes kept velocities sufficiently high to move the sediment through the system.
So basically they are just like deflectors to continue to deflect the.
Yes.
A:
Would somebody have recommended these in the process of design? How often were they
a new solution to the problem?
A:
The low vane dikes are something that I found the French had looked at. They had proposed
vane dikes for the Niger. There's a wonderful Dutch report on the Niger and Benue Rivers
and Rousselot and Chabert also reported on studies of vane dikes at a PIANC
congress in 196 1. As far as I know? such dikes were not constructed on the Niger. It was an
idea, and we model tested vane dikes, and they seemed to work.
So this is another technology transfer? You would have done a lot of research.
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