. Principles of irrigation engineering, arid lands, water supply, storage works, dams, canals, water rights and products. to say that any one type is superior to all others. Afundamental principle which should be borne in mind is that deliveryboxes are essentially a part of a canal system and should therefore beopened and closed only by the organization which operates the canalsystem. They should be so constructed that should it be foundnecessary, interference with them by unauthorized persons can bedetected and prevented. The amount of water delivered to the lands can be measured onlyat the p
. Principles of irrigation engineering, arid lands, water supply, storage works, dams, canals, water rights and products. to say that any one type is superior to all others. Afundamental principle which should be borne in mind is that deliveryboxes are essentially a part of a canal system and should therefore beopened and closed only by the organization which operates the canalsystem. They should be so constructed that should it be foundnecessary, interference with them by unauthorized persons can bedetected and prevented. The amount of water delivered to the lands can be measured onlyat the point of deliveiy. It is therefore necessary that a deliverybox be provided with suitable equipment for ascertaining the waterwhich passes through it, if record of the amount used in irrigation is tobe kept, as it should be in every case. The simplest form of delivery box consists of a rectangular woodenstructure placed in the side or bank of a canal or lateral and providedwith an opening through which water is diverted. When not in use,the opening is closed by means of boards or some simple form of gate Vlir. Fig. a.—Distributing laterals with wooden boxes and gates, typical of thepioneer work in irrigation. Yakima Project, Wash.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectirrigat, bookyear1913
