United States Department of Transportation
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Handbook of Channel Design for Soil and Water Conservation
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1966-08-01
[PDF-1001.10 KB]
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Abstract:The factors to consider in open-channel flow and stability, together with graphical methods for designing conservation channels, are presented in this handbook, The purpose is to furnish technicians of the Soil Conservation Service with the most recent and complete information to aid them in the design of channels to be lined with vegetation. Complete graphical methods are presented that deal with retardance to flow offered by vegetation as a function of the depth and velocity of flow. In addition, as an aid in designing channels where the retardance may be considered constant, e.g., one with a concrete lining, a simple nomographic solution of the Manning formula has been developed. The dimensions of trapezoidal (side slopes 1:1, 1,5:1, 2:1, 2,5:1, 3:1, 4:1, 5:1, and 6:1), triangular, and parabolic channels are determined graphically. The solution for parabolic channels permits the determination of the width for any depth and the approximate side slope at each depth. The appendix contains pertinent experimental results from which the degrees of vegetal retardance were determined and recommendations based. A list of references is included.
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