Handbook of Hydraulics for the Solution of Hydraulic Problems

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1918 edition. Excerpt: ...cent, to Q to allow for deterioration. For clean neat cement channels. Add 6 per cent, to Q to allow for deterioration. For clean hard brick well-pointed conduits. Add 5 per cent, to Q to allow for deterioration. 2.146 v = 92.1r 60Js-4e or a = 0.0000609 (9d) For clean smooth-faced concrete conduits. Add 5 per cent, to Q to allow for deterioration., 2.123 v = 95.1r-66V-471 or s = 0.0000631---4 (9e) For dressed masonry channels in cement with no projecting surfaces.. Add 8 per cent, to Q to allow for deterioration., 2.070 v = 109.7r-7s 483 or s = 0.0000597 (9/) 1 A. A. Bernes: Hydraulic Flow Reviewed, Spon and Chamberlain, Publishers. For rock-faced masonry channels in cement. Add 8 per cent. to Q to allow for deterioration. v = 80.5r-863s082 or s = 0.0001112 (9g) For hammer dressed dry masonry water courses. Add 10 per cent, to Q to allow for deterioration., 2.000 v = TO.Or00820-600 or s = 0.0002041 (9h) For earth canals in average working condition and rivers free from vegetation. No addition to Q., 2.016 v = 58.4r-Ms0-4M or s = 0.0002746 (9t) Discussion of Open-Channel Formulas In the light of our present knowledge it would be difficult to say that any one of the foregoing formulas or sets of formulas possesses marked advantages from the standpoint of accuracy. Probably any of the formulas in experienced hands will give reasonably satisfactory results and yet no one of them will prove to be infallible under all conditions. In applying these formulas to practical problems the inexperienced man may find his results even more disappointing. In any of the formulas listed, excepting the Barnes formulas, it is necessary to select a coefficient, representing the degree of roughness of the channel. Values of this...