150 



INDEX 



Point of control, 70, 94 

 Precipitous channels, 72 

 Profile of the hydraulic jump, 30 

 Profiles over changes of grade, 84 

 Pulsating flow, 72 



Ramser, C. E., 5 

 Rapid flow, 23 



around bends, 116 

 Rectangular channels, alternate depths 

 in, 19 



backwater curves in, 60, 63 



critical depth in, 18 



hydraulic jump in, 24, 52 



sequent depths in, 45 



uniform flow in, 8, 9, 10, 11 

 Rehboclc, T., 126, 127, 130 

 Reservoirs, channel connecting, 91 



routing problems, 133 

 Reynold's critical flow, not to be con- 

 fused with Belanger's, 23 

 Riegel, R. M., 28 

 Roll waves, 72 

 Roughness coefficients, 5 



effect of curvature on, 114 

 Round-bottomed channels, 13, 14 

 Routing computations, with invariable 

 stage-discharge relation, 133 



with variable stage-discharge relation, 

 142 

 Russell, J, Scott, 52, 58 

 Rutter, E. J., 135 



Scobey, F. C, 5, 112, 114 

 Section, 1 



computing hydraulic properties of, 97 

 Section identification, 99 

 Selection of Chezy's Cfor Bresse's meth- 

 od, 71 

 Sequent depths, 28 



computation of, 44 



table for rectangular, triangular, and 

 trapezoidal sections, 45 

 Sherman, E. C, 126 

 Shooting flow, 23 



around bends, 116 

 Sills, diagonal, 119 

 Singular solution, 51 

 Slide chart, 144 



Slide rule, use in backwater computa- 

 tions, 98, 99, 100 



Slide rules for flood routing, 137-145 

 Slope, adverse, 65, 86 



change of, 84 



channel bottom, 61 



critical, 64, 85 



friction, 63, 64, 76, 102 



mild, 64, 85 



steep, 64, 85 



water surface, 61 

 Snyder, F. F., 135 

 Solitary wave, 52, 58 

 Spiral flow in bends, 113 

 Spiral wall transition, 120 

 Standard step method, 96 

 Starting elevation not known, 95 

 Static head, 3 



versus velocity head, 20 

 Steady flow, 2 

 Steady uniform flow, 4 



computation of, 6 



Ganguillet-Kutter formula for, 4 



Manning formula for, 4 



tables for, 8-14 



values of n for, 5 

 Steep slope, 64, 85 



precipitous, 72 

 Steinberg, I. H., 107 

 Step methods for backwater curves, 94 



choice of, 96 



choice of friction coefficient, 99 



direction of computations, 94 



for uniform channels, 108 



Grimm's method, 103 



Leach's diagram, 107 



Standard step .nethod, 96 

 Stevens, J. C, 97 



Storage under the backwater curve, 145 

 Streaming flow, 23 



around bends, 110 



classes of, through channel obstruc- 

 tions, 127 

 Sub-critical flow, see Streaming flow 

 Super-critical flow, 23 



around bends, 116 

 Superelevation, 112, 116, 120 

 Superstorage, 145 

 Surf, ocean, 52, 58 

 Surge, 52 



Tailwater below hydraulic jump, 33 

 Thomas, H. A., 72, 133 



