. Principles of irrigation engineering, arid lands, water supply, storage works, dams, canals, water rights and products. h theHuntley Montana Reclamation project, where, with the drop of30 ft. in the main canal, a portion of the water is lifted to a height of50 ft. above the canal to irrigate higher lands as shown in Fig. 35. The device used at Huntley consists of a turbine wheel attached tothe lower end of the vertical shaft on the upper end of which is acentrifugal pump, the water passing into the turbine wheel actuatesit, driving the centrifugal pump which in turn is fed by a portion ofthe
. Principles of irrigation engineering, arid lands, water supply, storage works, dams, canals, water rights and products. h theHuntley Montana Reclamation project, where, with the drop of30 ft. in the main canal, a portion of the water is lifted to a height of50 ft. above the canal to irrigate higher lands as shown in Fig. 35. The device used at Huntley consists of a turbine wheel attached tothe lower end of the vertical shaft on the upper end of which is acentrifugal pump, the water passing into the turbine wheel actuatesit, driving the centrifugal pump which in turn is fed by a portion ofthe water which is flowing toward the turbine. This portion, aboutone-third of the capacity of the penstock, is forced upward to a higherlevel. This machine is enclosed within a cylindrical case, so that all partsof the machinery are protected and when once installed the pumpruns continuously with a minimum of attention throughout theirrigation season. Hydraulic rams can also be installed in localities of this kind, thisdevice depending upon the water hammer or ram of the water. 126 PRINCIPLES OF IRRIGATION ENGINEERING. IRRIGATION BY PUMPING 127 which when falling rapidly is suddenly checked, the momentumcausing a portion of the water to be forced to a higher rams have reached a capacity as high as 5 cu. ft. per secondof delivery, and are found to be very economical for are very noisy and the shock of the arm rapidly wears themoving parts unless these are carefully adjusted. They are easilyclogged or put out of order and on the whole have not given a highdegree of efficiency for continuous operation for any considerableperiod of time. Compressed Air.—Where compressed air can be readily obtainedfrom an established plant, it has been found feasible to lift water fromdeep tubular wells by means of what is known as the air lift. Forexample, in the vicinity of sugar-beet factories or large mills wherethere is an excess of power or of compressed air,
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectirrigat, bookyear1913
