|
<br />: .-- -.
<br />r~ i'. .'.'-,> ,.- .
<br />
<br />" C" - ,
<br />',.J "~J ~~_'~\ d
<br />
<br />!.
<br />
<br />River between the mouths of the Animas and La Plata Rivers with the
<br />addition of the project return flows from Farmington. During the
<br />spring runoff period the flows of the San Juan River at Farmington
<br />would be decreased by an average of 9 percent. During the
<br />remainder of the year the flows would be decreased by an average
<br />of 12 percent. In a wet year such as 1973, the monthly effect of
<br />the project would range from 2 to 15 percent; in a normal year such
<br />as 1966, the effect would range from 5,to 42 percent; and during
<br />a dry year such as 1977 the effect would range from 2 to 33
<br />percent. Monthly flows of the San Juan River at Farmington in
<br />representative wet, normal, and dry years are given on the
<br />following table and Figures 19 through 21:
<br />
<br /> Representative monthly flow with and without the project--
<br /> San Juan River at Farmington
<br /> (Unit-cfs)
<br /> Wet Year (1973) Normal Year (1966) Drv Year (1977)
<br /> without With Without with without With
<br /> Project Project Project Project project project
<br /> January 1,605 1,397 3,185 3,011 1,540 1,508
<br /> February 2,249 2,063 2,037 1,882 960 941
<br /> March 1,694 1,449 2,596 2,381 582 568
<br /> April 1,979 1,749 3,895 3,588 417 399
<br />. May 6,302 6,191 4,249 3,994 576 450
<br />June 7,589 7,144 2,150 1,670 983 659
<br />July 6,291 5,815 807 465 769 669
<br /> August 3,768 3,333 545 424 1,060 839
<br /> Septem!:>er 2,993 2,736 478 426 581 477
<br /> October 2,061 1,888 1,561 1,457 641 557
<br /> Novem!:>er 2,092 2,003 877 791 750 682
<br /> December 2,136 2,058 786 692 769 708
<br />
<br />Near Bluff, the decrease in flow during the spring runoff would be
<br />390 cfs, or 9 percent, and during the rest of the year the average
<br />decrease would !:>e 140 cfs, or 10 percent. In a wet year such as
<br />1973, the monthly effect ranged from 5 to 12 percent; in a normal
<br />year such as 1966, the effect ranged from 5 to 37 percent; and in
<br />a dry year such as 1977, the effect ranged from -8 to 55 percent.
<br />
<br />.
<br />
<br />8
<br />
|