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CAPACITY OF RESERVOIR

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Originally appearing in Volume V28, Page 391 of the 1911 Encyclopedia Britannica.

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CAPACITY OF See also:

RESERVOIR

RESERVOIR /N GALLO See also:

Note.—The figures in the right-See also:

hand See also:

COLUMN (Lat. columna)

column at the ends of the curved lines are inches of mean See also:

ANNUAL

annual rainfall over a See also:

period of 5o years. The co-ordinates to any point upon any curved See also:

LINE

line give respectively the required reservoir capacity and daily yield in gallons per See also:

acre of drainage See also:

AREA

area, corresponding with the mean annual rainfall • represented by that curved line. The curves have been See also:

DRAWN

drawn for a mean annual evaporation of rq in. For any increased See also:

RATE

rate of evaporation r / in. are to be subtracted from the rainfall for each See also:

INCH (O. Eng. ynce from Lat. uncia, a twelfthpart; cf. " ounce," and see As)

inch of evaporation above 14 in. For any decreased rate of evaporation r in. are to be added to the rainfall for each inch of evaporation below 14 in. Any excess of evaporation from the See also:

WATER

water See also:

SURFACE

surface and See also:

ALLOWANCE (from "allow,' derived through 0. Fr. alouer from the two Lat. origins adlaudare, to praise, and allocare, to assign a place; so that the English word combined the general idea of "assigning with approval")

allowance for bottom water are to be added to the storage so found. • The period over which the reservoir equalizes the flow is shown by the number of years marked on the straight radial lines. Where the See also:

ABSOLUTE (Lat. absolvere, to loose, set free)

absolute minimum stream flow is known to be greater • than the minimum of icubic See also:

FOOT

foot per second per woo acres (ro8gallons • per acre per See also:

day) assumed in the See also:

DIAGRAM

diagram, the capacity of the reservoir as taken from the diagram may be reduced by the amount corresponding to that minimum flow for the particular rainf aU and evaporation. )FORA/NAGE AREA.

End of Article: CAPACITY OF RESERVOIR

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