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| I read elsewhere that river current runs the same speed top of the river to the bottom. I remember from somewhere that it actually runs faster t at the top of the column than to bottom, is that true? |
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| Air and substrate both impose a "drag" on current velocity in a stream channel. In a channel with uniform depth and substrate, current velocity is always greatest at a depth 1/3 the distance from the surface to the bottom. I learned this while studying the limnology of backwaters on the Mississippi River as a graduate student. Thanks for cleaning out the cobwebs!
Dave Neuswanger
Fisheries Team Leader, Upper Chippewa Basin
Wisconsin DNR, Hayward |
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Posts: 32886
Location: Rhinelander, Wisconsin | I once heard it described as this:
Take 20 sheets of 1/2" plywood. Stack them with dowels underneath each sheet so all will roll freely. Give them a shove, evenly, and forward. Given that all have the same push forward which sheet of plywood will hit the ground first? |
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