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Show 6153 By Mr. Farnsworth: Q That is, the steeper portions of the lower canyon? A The records at Bluff would not in any sense indicate any velocities on the San Juan River; that is, the gaging are encountered, the gaging station is so located that it is on the quietest place on the San Juan River, in order to be able to obtain some observations. Q Well, we have the gradient from actual measurement, Mr. Hoyt. I think that is a better standpoint. A The gradient is, it is true, an indication of the velocity. Other conditions being equal, the velocity varies per the square root, I think, of the slope. To be exact, the velocities are equal to the constant of the square root of the hydraulic radius and time and slope. Now, if the cross-section of the bed remains the same, and you have exactly the same cross- section at another point of the stream; you have exact-ly the same character of bed. In other words, if you con-stant and your hour and hydraulic radius are the same abso-lutely, then it is possible to determine the velocity at some other point by use of the slope. |