Artificial roughness standard for open channels: abstract
There are two principle equations, which are used in computing discharges in open channels. These are: (1) Q = CA RS (Chezy), (2) Q = (1.486/n)AR2/3 S1/2 (Manning). The resistance coefficients C and n are assumed to be constant for a particular location. Previous investigations have shown that these coefficients may vary as much as 100 percent for the same section. A similar situation existed for pipes until a new method was devised for finding the resistance coefficient by using an artificial roughness standard and considering the magnitude of the Reynolds number. An artificial standard for the ...
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