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<br />9
<br />
<br />Significance may be given to the fact that in earlier years, prior to 1945, no
<br />
<br />water entered the reservoir at a rate lower than 1,000 cfs, while in later years
<br />
<br />as much as one-third of the annual flow has been at a rate less than this.
<br />
<br />The percent of flow by months, for period 1932-63, is given in table 7. There
<br />
<br />is great difference between individual months, but on the average, September and
<br />
<br />October provide most water, with June and July next.
<br />
<br />But the averages do not show the full picture. Consider 1932, when 42.6
<br />
<br />percent of the annual flow came in September and 70.3 percent in September and
<br />
<br />Table 7.-Percent of flow by months, Rio Grande at Laredo, Texas.
<br />
<br />Year Total flow Jan. Feb. Mar. A.pr. May June July Aug. Sept. Oct. Nov. Dec.
<br /> (acre-feet)
<br />1932 7,310,310 2.1 1.8 1.7 1.3 2.7 1.2 2.3 3.3 42"6'~ 28.3 7.8 4.9
<br />33 3,257,730 9.3 7.3 6.8 5.8 5.1 4.8 6.7 5.4 22.7 15.3 5.8 5.0
<br />34 1,873,000 9.5 8.2 8.5 8.5 9.3 11.8 8.5 7.1 9.7 6.7 6.5 5.7
<br />35 5,136,400 2.2 1.9 2.2 2.4 11.5 26.4 6.3 4.0 25.8 8.4 4.8 4.1
<br />36 3,487,000 5.3 4.4 5.3 3.5 6.5 9.2 10.2 4.9 26.5 13.1 5.5 5.6
<br />37 2,058,000 7.5 6.5 7.0 5.0 5.7 14.9 7.0 6.2 ll.O 14.6 6.7 7.9
<br />38 4,508,000 4.3 3.2 3.0 3.1 2.5 3.0 27.7 12.5 23.0 9.5 4.3 3.9
<br />39 2,133,000 7.7 6.9 6.4 4.8 13.7 6.8 6.1 18.7 6.6 8.2 7.6 6.5
<br />40 2,298,500 6.0 5.6 5.2 5.9 13.7 ll.2 9.3 12.9 8.8 10.7 5.6 5.1
<br />41 5,521,700 2.4 2.4 2.2 2.6 9.6 7.2 7.1 7.9 14.5 29.1 9.6 5.4
<br />42 5,400,000 4.9 3.9 3.5 3.2 8.2 6.7 8.7 9.1 28.8 12.0 6.2 4.8
<br />43 2,370,500 9.1 7.0 7.1 6.0 8.9 ll.8 13.9 5.7 5.1 12.2 6.7 6.5
<br />44 2,555,470 6.5 5.5 5.1 3.6 5.7 5.1 3.3 17.1 23.6 12.3 6.3 5.9
<br />45 2,309,670 7.0 5.8 5.2 8.1 3.5 2.0 17 .6 4.1 2.9 30.5 7.3 6.0
<br />46 2,735,300 5.1 4.3 3.9 6.3 11.5 13.6 7.5 4.5 12.1 19.0 6.5 5.7
<br />47 2,010,750 8.6 7.2 6.2 3.9 10.0 13.9 4.6 9.9 17.3 6.2 5.7 6.5
<br />48 2,679,330 3.8 3.8 3.7 2.2 2.6 30.6 21.8 4.5 11.0 6.0 5.4 4.6
<br />49 3,467,200 3.3 12.2 6.5 9.+ 8.1 9.7 6.6 15.4 9.6 9.0 5.6 4.9
<br />50 1,937,620 8.5 6.8 6.5 4.4 6.7 9.1 12.8 10.1 13.9 10.6 5.4 5.2
<br />51 1,284,740 7.6 7.1 8.1 4.9 22.4 13.6 5.5 5.9 8.9 5.3 5.6 5.1
<br />52 1,010,830 6.5 5.5 4.6 5.0 14.7 8.3 34.2 5.5 3.0 3.2 4.3 5.2
<br />53 1,017,227 5.4 4.0 6.7 2.8 3.3 0 1.7 18.4 40.1 7.6 4.9 5.1
<br />54 4,310,030 1.2 1.1 .7 5.6 6.6 46.3 15.2 6.6 5.9 5.8 2.6 2.4
<br />55 1,894,000 5.2 4.5 3.0 1.9 7.1 5.4 9.9 17.3 20.5 13.5 6.3 5.4
<br />56 786,640 11. 7 9.2 6.3 4.6 5.0 2.3 5.9 4.7 12.9 21.0 8.2 8.2
<br />57 3,220',330 1.9 2.2 2.1 14.4 42.0 ll.4 2.2 3.0 5.2 7.8 4.2 3.6
<br />58 4,571,770 3.1 2.8 2.3 1.4 4.0 6.7 2.5 2.1 18.7 39.9 fiO.7 5.8
<br />59 2,527,900 8.7 6.9 6.0 5.1 7.0 8.9 10.8 7.0 ll.2 15.4 7.0 6.0
<br />60 2,356,060 6.8 7.4 6.5 4.2 3.9 2.6 12.2 11. 7 12.4 16.0 8.3 8.0
<br />61 2,383,720 7.4 6.2 4.4 3.2 4.4 27.2 13.7 9.7 6.6 6.4 5.7 5.1
<br />62 1,411,560 8.2 6.1 5.4 7.2 4.7 6.7 7.7 5.5 12.5 18.9 9.2 7.9
<br />63 1,294,439 7.7 6.4 4.8 6.9 10.5 11.0 7.6 8.7 13.0 10.7 5.9 6.8
<br />Ave. 2,847,460 6.1 5.4 4.9 4.9 8.8 10.9 9.9 8.4 15.2 '13.6 6.3 5.6
<br />
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