Water-power; an outline of the development and application of the energy of flowing water . ears. The flowat that time must have been 200 000, possibly 250 000, cubicfeet per second. Floods approach with such rapidity as to DESCEIPTION OF SOME STONE DAMS. 131 jeopardize the lives of people who are fording the the crisis of the flood is past it rapidly subsides, and in afew days the river reverts to its normal condition, except thatthe water remains turbid for a long time. The water falls alittle lower in summer than in winter, but there is no distinctlyhigh-water season. The aggre
Water-power; an outline of the development and application of the energy of flowing water . ears. The flowat that time must have been 200 000, possibly 250 000, cubicfeet per second. Floods approach with such rapidity as to DESCEIPTION OF SOME STONE DAMS. 131 jeopardize the lives of people who are fording the the crisis of the flood is past it rapidly subsides, and in afew days the river reverts to its normal condition, except thatthe water remains turbid for a long time. The water falls alittle lower in summer than in winter, but there is no distinctlyhigh-water season. The aggregate flow of the stream prob-. Fig. 53, ably does not amount to a tenth part of what is to be expectedfrom an equal drainage-area in Northern latitudes. The river here flows in a formation of shelly lime rock l>ingin nearly horizontal strata. It has worn a canyon 45 or 50feet deep and some 1200 feet wide, about half this width beingfilled with argillaceous deposit brought down by the dam raises the water 60 feet above the low-water stageand has an overflow about 1140 feet long. It forms a lake 132 DAMS OF masoxi:y. extending some 20 miles. Although the question of theabrasion of the bottom was here of subordinate importance byreason of the small flow, the base of the dam was spread outinto a broad apron or toe to shield the rock from the directimpact of the stream. It was contemplated by the engineerto extend this apron by a bed of concrete if found flood such as occurred in 1869 would probably raise thewater i 5 feet on the crest of the dam, but in such a flood thewater would be 45 feet d
Size: 1664px × 1502px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjecthydraulicengineering
