Studies on the Hydrology of the Little Tennessee River Drainage Area (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1914 Excerpt: ...velocities to mean velocities are accurate to within less than two per cent. As a rule in most of the meter verticals in the gaging sections on this work, the velocities varied irregularly and smooth vertical velocity curves are the exception rather than the rule. Yet since usually at least one curve is taken on each station within the gage range, and, as the average values of all ratios plot on fairly smooth curves, there is little reason to believe that the average ratios as applied to the computations are in error more than two or three tenths of one per cent. Comparison with Other Methods In comparison with other methods of gaging and computation, the following facts may be of interest. ased on forty-two vertical velocity curves taken within a range of 0.3 of a foot at Judson section on the Little Tennessee, the average velocity in the entire section as ordinarily obtained by the "two-tenths and eight-tenths depths" method is six per cent greater and that "by the Hsix-tenths" method 2% greater than the velocities obtained by the "point vertical velocity curve method." For the gage range named above the average depth is 3.2 feet and the average velocity is 3.6 per second. This section is shallow and swift and has a decidedly rough bottom. At the Bryson City Section on the Tuckaseegee River, which may be taken as typical of deep, slow, smooth bottom sections, similar computations made for two stages (in the lowest of which seventeen curves were taken and at the highest some twenty curves), indicate that with the lower stage at which the average depth is four feet and the velocity 0.8 feet, the "two-tenths and eight-tenths depths" method and the "six-tenths method" would both have given results % smaller wh...