Waste Management

Download Civil engineering hydraulics: essential theory with worked by R. E. Featherstone PDF

By R. E. Featherstone

The textual content presents an creation to the speculation of civil engineering hydraulics, sponsored up with a number of labored examples and workout difficulties, with solutions, to assist readers determine their figuring out of the speculation and strategies of research and layout. This revised version gains additional info on uniform and non-uniform stream, sluice gates and a few easy culvert stream difficulties.

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Extra info for Civil engineering hydraulics: essential theory with worked examples

Example text

With WCs there should be sufficient water for the containment of excreta. Limit noise Noise generated by discharges should be limited so as to maintain a satisfactory environment in buildings. 4) saving 326 26 19 30 56% 138 14 20 22 50% 44% from appliances is one source of noise, pressure variations causing seal loss are another. Be and remain leaktight Leakage of contaminated water and foul air into a building is to be avoided, taking account of the conditions of service including the volumes and temperatures of discharges likely and the possible activities of the occupants.

Enquiries suggested that in multi-storey fiats in the UK about one-quarter use a central hot water supply, sometimes via calorifiers in the fiats; perhaps one-third use individual hot water cylinders with immersion heaters, whilst combination tanks and instantaneous gas heaters each serve about one-fifth. British Standards have in the past generally laid down dimensions for all classes of appliances, fittings and piping. The use of performance standards, in which the standard sets out the performance to be met by the component instead of or as well as giving a detailed dimensional specification for that component, offers scope for new developments in this general field.

Whilst the storage cistern has merit from a back-siphonage standpoint in separating outlets from the mains, protection in conventional U K domestic installations also derives from the use of an air gap at individual appliances. A gap is provided, for example, with washbasins, baths and sinks where taps generally are fixed with outlets 12mm or more above the overflow rim of the appliance. In cisterns the ballvalve is intended to discharge at a distance above the overflow pipe not less than the diameter of the pipe, although this is not always achieved in flushing cisterns.

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