A general formula for the uniform flow of water in rivers and other channels; by E. Ganguillet and W.R. Kutter. Tr. from the German, with numerous additions, including tables, diagrams, and the elements of over 1200 gaugings of rivers, small channels and pipes, in English measure (1889)
Ganquillet, E, Hering, Rudolph, 1847-, Kutter, Wilhelm R., 1818-1888, Trautwine, John Cresson, 1850-1924 · New York J. Wiley · leaf 63
ymptote, dd. In order to test the correctness of this assumption, we madeuse of the following graphic process : From the formula we have, dividing by j. c = y ^+1 /R c = y y Vr RELATION BETWEEN COEEFICIENTS OF ROUGHNESS. 35and, taking the reciprocals of these values, I _ I ;r I c~ y y \^li This is… … Abucinsae — .g. 6 \R and the point e where the straight line cq intersects the axisof ordinates.Also, I I £ ^~ J ^ yI X I vr X — J y which is the tangent of the angle qap at oJ * If, therefore, we take —-^ = op, we have.\R — • —= = tiq, andy Vr — Trat 36 GENERAL FORMULA FOR UNLFORM FLOW OF WATER.…
Hydraulics · Stream measurements
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