The American Engineer Volume . 3

The American Engineer Volume . 3

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1882 edition. Excerpt: far greater than is requisite to effectually clear away any such settlement as may occur. The fact also already mentioned of the basin being provided with a concrete flooring, will allow of less adhesion between the mud and the bottom of the basin. It must bo borne in mind that under the most favorable conditions the sluices will have to play into a depth of 4 feet of water, whilst at low water of neap tides there will be as much as 12 feet of water in the basin, when it will be obvious that the effect of the sluices will be very small. The sluicing operations, therefore, will be chiefly carried on at the low water of spring tides, when the accumulations which take place during the intervening neap tides will have to be dealt with. The effects or ranges of sluices can only be determined by experience, and even then, under very slight variation of circumstances, the greatest differences are to be noticed. The most economical area for sluices, combined with the velocity of their discharges, are all questions which may be theorised upon to any extent, but which, in the author's opinion, are only to be actually decided by trial. The author himself undertook some experiments with a model to a large scale upon the effects of various sizes of sluices and different velocities of water when discharging into a head, but owing to the difficulty of obtaining a steady diagram of the effect--the current being always affected by the back water in the tank into which the water was discharged and the difficulty of scaling the effects, no very reliable results were obtained. In the case of some of the sluices in the dock estate, which are under very similar circumstances to those already described, but which are of very inferior construction, the effects more

Product details

  • Paperback | 406 pages
  • 189 x 246 x 21mm | 721g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236643194
  • 9781236643193