The Elements of Practical Hydraulics ...1861 |
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adjutages angle Ballyteigue border bottom width breadth Bridgetown Broad Water Calculate canal centre channel charge coefficient consequently constant constructed contraction convey crest cubic feet curve determine diameter dimensions diminished divided drainage edge embankment equal estuary excavated experiments feet per second flood fluid formula given gives greater H₁ head height hence high-water horizontal hydraulic mean depth inches inclination increased length Lough low-water masonry maximum mean velocity mean width mètres Michelotti motion multiplied neap tides nearly opening orifice outlet overfall pipe pressure proportion quantity of water ratio rectangle rectangular reservoir resistance Ring's Nook rise river River Lea River Nene sewers side slopes sill sluice sluice-door soffit specific gravity spring tides square root stream supply suppose surface thin plate tion transverse area transverse section trapezium tube upper vertical vessel volume of water water flowing weir
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Сторінка 169 - thus preventing the inundation of the valley to the extent of nearly a square mile, where the country is below the level of the surface of the water in the canal. It
Сторінка 176 - (now the drawbridge at Long-Sutton), at three-quarters ebb, the torrent rushed down four feet in the last quarter of a mile: this, of course, carries off the sand daily; and, by the law of nature, the four-feet fall will recede inland, until nearly a uniform inclination or slope shall penetrate to Wisbeach, which
Сторінка 175 - If you cut a canal, you are sure that the removal of earth, and the usual apparatus of locks, will attain your object ; but the improvement of harbours, and of drainage by rivers, depends on the management and direction of natural causes and effects; in which, I may say, observation
Сторінка 175 - of your river, and also straightening its course, so as to lose no downfall. This increased downfall and increased tidal water is made to bear directly upon the old sand-banks; and if the connexion with deep water can be established in this manner, you obtain a harbour of easy
Сторінка 7 - be so, since the cause of this difference — the resistance of the air — increases as the square of the velocity, and, consequently, nearly as the
Сторінка 174 - lower than it did in the old channel, immediately opposite to the South Holland and North Level sluices, which are the outlets for
Сторінка 175 - management and direction of natural causes and effects; in which, I may say, observation has been so torpid, that till twenty years since, much more harm than good had been the result of interference. All the reports of Mr. Smeaton, and some made scarcely sixteen years since, prove that in large
Сторінка 123 - friction of a body, when in a state of continuous motion, bears a constant ratio to the pressure upon it, which is the same, whatever may be the velocity of the
Сторінка 175 - fall may become one inch, which is ineffectual. " The sound principle which results from these facts is, to give free ingress to the tidal water, guarding against inundation by raising the