Water-power; an outline of the development and application of the energy of flowing water . ngth in proportionto the volume of water to be discharged over it. No diflicultyis encountered in commencing the work, or in carrying it on,by anv method deemed suitable, whether by the aid of coffer-dams or by deposit of material in water, till a large part of thelength is completed. Even should abrasion manifest itself, it?can be readily checked by a light deposit of broken stone, quarrychips, or any available material. The abutments, the wastewayfor carrying off the inland waters, the sluices, races
Water-power; an outline of the development and application of the energy of flowing water . ngth in proportionto the volume of water to be discharged over it. No diflicultyis encountered in commencing the work, or in carrying it on,by anv method deemed suitable, whether by the aid of coffer-dams or by deposit of material in water, till a large part of thelength is completed. Even should abrasion manifest itself, it?can be readily checked by a light deposit of broken stone, quarrychips, or any available material. The abutments, the wastewayfor carrying off the inland waters, the sluices, races and wheel-pitsmay all be completed before chsturbing the regimen of the completed portion is supposed to terminate in a verticalface, and to have a Hnc of sheet-piling through the centre, theportion to be closed lying between the vertical face and the com-pleted abutment. The bottom is supposed to have been broughtto a uniform depth by dredging off the high parts and fllling upthe low. i 2;. I I I Fig. 52. storm Tide. 15 Spring Tide. 12 Mean Tide. JO Seap Tide. ^=^^^5^5S5=^. Low -nde. 0 —^ u Fig. 53. [To face page 117.] DAM /.V TIDAL WATERS. WJ A line of sheet-piling is driven along the centre line of the dam,properly joined to the completed parts, and cut off, at a uniformheight, a few inches above the bottom. These piles are repre-sented as 6 inches thick, but at intervals of 13 feet, centre to centre,a 12-inch square pile is driven, forming a part of the Hne. On eachside of the last-mentioned pile three or four piles of the samesize are driven in contact, after the manner of sheet-piling, forminga short Hne at right angles to the main line. At each end of thisline a brace is applied, footed on a cap-sill, which rests on abent of round piles, as indicated in Figs. 52, 53, forming a trestle,ver}^ firmly bound together by iron straps as indicated. Thesquare pile next the line of sheet-piUng on the land side risesto the height of storm-tide; the next 2 feet lower; t
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecthydraulicengineering
