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<br />1946. This was a result of the closing of a large
<br />army hospital which was being served with water in
<br />1945. The data on population served in Santa Fe
<br />does not show a cottesponding dwp in 1946 due to
<br />the fact that information on the number of military
<br />personnel is not available.
<br />
<br />Santa Fe is now serving apprqximately 3,100 acre-
<br />feet of water to about 28,000 people.
<br />
<br />WATER REQUIREMENTS PER ACRE
<br />
<br />The data on water requirements for cities is usu-
<br />ally resolved into and expressed in terms of gallons
<br />per capita per day or million gallons per day of total
<br />water used. Data on water for agricultural purposes
<br />is usually expressed in terms of acre-feet per acre
<br />per year. As a result of these different systems and
<br />different bases for expressing data, direct compar-
<br />isons of the water requirements for municipalities
<br />and the requirements for agricultural purposes are
<br />seldom available.
<br />The following data is presented so that the gen-
<br />eral relationship between municipal water require-
<br />ments and agricultural water requirements, both
<br />expressed on an area basis, may be more generally
<br />understood.
<br />Table No. 2 shows the average water require-
<br />ments in terms of acre-feet per acre of area served
<br />for the cities of EI Paso, Phoenix, Albuquerque, and
<br />
<br />Santa Fe. This data is averaged for the entire area
<br />served since the requirement per acre varies consid-
<br />erably between the densely populated areas of the
<br />cities to the outlying undeveloped areas. This
<br />variation in water requirements per acre is illus-
<br />trated on Plate No.4, which shows by contours, the
<br />variation in intensity of water requirements for the
<br />Phoenix, Arizona, area served in 1950..
<br />It will be noted that the average for the entire
<br />area is 2.0 acre-feet per acre per year with a max-
<br />imum requirement of 5 acre-feet per acre par year.
<br />The average requirements va'ry from year to year
<br />as a result of partially developed areas being bfOught
<br />into the served area; however, over a period of years
<br />these factors are averaged, and the results show a
<br />faidy uniform pattem or trend.
<br />In the, case of EI Paso, over the period of years
<br />from 1920 to 1950, the average quantity of water
<br />required for the area served, including undeveloped
<br />areas, varied from 1.0 to 1.2 acre-feet per acre per
<br />year.
<br />Dudng the period from 1940 to 1950 the require-
<br />ments of Phoenix, Arizona, varied from 1.9 to 2.5
<br />acre-feet per year. In 1954 this requirement dfOpped
<br />to 1.1 acre..feet per year as a result of substantial
<br />expansion of the area served into less densely pop-
<br />ulated areas. Prior to 1950 the area served in
<br />Phoenix was limited to the more densely populated
<br />areas, resulting in a higher requirement per acre.
<br />
<br />Table 2. Municipal Domestic Water Requirements Related to Area Served
<br />
<br /> Area Total Average Estimated
<br /> Served Water Water Consumptive
<br /> In Required Required Water Use
<br />Location Yeat Acres Acre Ft/Y r. A.F./ Acre/Yr. A.F./ Acre/Yr.
<br />El Paso 1910 6,045 3,350 0.6 0.2
<br />" 1920 7,310 6,950 1.0 0.3
<br />" 1930 8,640 9,300 1.1 0.4
<br />" 1940 8,792 10,300 1.2 0.4
<br />" 1950 18,546 20,800 1.2 0.4
<br />Pboenix 1940 8,000 18,800 2.3 0.8
<br />" 1941 8,300 15,600 1.9 0.6
<br />" 1942 8,900 17,300 1.9 0.6
<br />" 1943 9,000 18,800 2.1 0.7
<br />" 1944 9,100 20,000 2.2 0.7
<br />" 1945 10,000 23,000 2.3 0.8
<br />.. 1946 11,000 23,200 2.3 0.8
<br />" 1947 12,000 27,600 2.3 0.8
<br />" 1948 12,800 32,100 2.5 0.8
<br />.. 1949 15,600 35,600 2.3 0.8
<br />.. 1950 21,376 41,796 2.0 0.6
<br />" 1954 42,000 46,800 l.l 0.4
<br />Albuquerque 1954 34,000 26,700 0.8 0.3
<br />Santa Fe 1954 3,200 3,100 La 0.3
<br />Average 1.7 .5
<br /> 19
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