Re: TN river speed?


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Posted by jd on August 26, 2005 at 09:01:46:

In Reply to: TN river speed? posted by cob on August 25, 2005 at 12:54:54:

That is a very complex question as you probably know. The speed at the bottom will be much different than the surface speed. And every place that the river bends there will be wide variances in lateral surface speed.

On an average basis, the total flow is computed by multiplying the velocity times the area (Q=VA). Therefore, you can estimate the width and depth of a given river section and multiply together for the cross-sectional area. Then, divide the volumetric flow reported by TVA by the area to get the speed at any location.

Speed = Volumetric Flow / Cross-Sectional Area

When estimating the cross-sectional area, you may want to treat the river bottom as a triangle, but you are still gonna be doing some guessing.

Good luck!
jd


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