. Principles of irrigation engineering, arid lands, water supply, storage works, dams, canals, water rights and products. Section E-F Fig. 14.—Head-works for Interstate Canal, North Platte Project,Wyoming-Nebraska. 64 PRINCIPLES OF IRRIGATION ENGINEERING. bo P4 o CO 3 m CANAL STRUCTURES 65 resist overturning with the maximum head which may be imposedupon it. Another important factor in the design and construction of head-works is to provide sufficient curtain and wing walls to preventseepage either under or around the structure. The extent of suchprotection against seepage will depend upon the
. Principles of irrigation engineering, arid lands, water supply, storage works, dams, canals, water rights and products. Section E-F Fig. 14.—Head-works for Interstate Canal, North Platte Project,Wyoming-Nebraska. 64 PRINCIPLES OF IRRIGATION ENGINEERING. bo P4 o CO 3 m CANAL STRUCTURES 65 resist overturning with the maximum head which may be imposedupon it. Another important factor in the design and construction of head-works is to provide sufficient curtain and wing walls to preventseepage either under or around the structure. The extent of suchprotection against seepage will depend upon the amount of head andthe character of material in which the structure is placed and nogeneral rules can be laid down for designs of this kind. It is, however,essential that a complete study and investigation be made in eachparticular case. In backfilling around headgates the greatest care should be givenboth to the character and manner of compacting the ordinary conditions the greatest degree of compactness canbe obtained by the use of water, that is, by either wetting the mate-rial to a slight degree and tamping it or by depositing it in water. The capacity of a headgate should be computed not only for themaximum capacity of the cana
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectirrigat, bookyear1913
