An Estimate of Channel Roughness of Interoceanic Canals.
ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS
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The hydraulic roughness of the interoceanic canals created by either nuclear or conventional construction is considered. In the canals of nuclear excavation, the part of resistance due to the ejecta is estimated on the basis of distribution of size of ejecta material and the part due to the expansions and contractions in the canal created by the explosives is attributed to the isostatic losses from free turbulence. For the conventional canals charged with very fine sediment, the friction of the granular surfaces is assumed to be that in a hydrodynamically smooth surface. In the presence of bed features, the added form resistance is estimated from the findings of Alam and Kennedy concerning alluvial rivers. A detailed study of resistance noted in Fort Collins tests shows that there is a difference in the frictional processes between tthe laboratory flumes and the natural rivers, suggesting that for resistance estimates reliance should be placed on river calibration. Author
- Civil Engineering
- Fluid Mechanics