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<br />Month <br /> <br />Jan. <br />Feb. <br />}., March <br />, April <br />May <br />June <br />July <br />August <br />Sep- <br />oct. <br />Nov. <br />Dec. <br /> <br />WEIGffl'ED mNIHLY SALINITIES Kr II <br />SElECl'ED CX>lDRI\IX) RIVER STATlOOS <br />AND RUNNING 12-M>mH NIB-IMPERIAL FlCM-wEIGffl'ED SALlNI'lY DIFFERENI'IAL <br />(in parts per million) <br /> <br />=:> <br />=0 <br /> <br />..... <br /> <br />.... <br /> <br />-~ <br /> <br />,~ <br /> <br />BelOW' <br />Hoover Dam <br />5-Yeary <br />Avg. <br />1974-78:98:1999 <br /> <br />. <br />At Northerly Inter- RI.InrIi.Iq <br />national Boun:larv 12-ft:lnth <br />5-Y~ FlOW'-wtd. . <br />Avg. Differential <br />1974-78:1998:1999 1998 1999 <br /> <br />Palo Verde <br />Canal Near 81 vthe <br />5-Year y <br />Avg. <br />1974-78:98:1999 <br /> <br />BelOW' <br />Parker Dam <br />5-Yeary <br />Avg. <br />1974-78:98:1999 <br /> <br />At <br />T1T1\'lF>rial Dam <br />5-Y~ <br />Avg.Y <br />1974-78:1998:1999 <br /> <br />690 613 591 709 751 913 665 687 1,041 698 730 57.4 44.6 <br />675 610 610 706 732 835 629 701 998 641 856 44.1 57.8 <br />684 610 583 699 727 805 627 710 925 676 782 41.4 60.3 <br />680 602 585 700 714 801 651 684 892 736 773 42.2 59.5 <br />677 595 698 709 822 656 962 771 47.2 <br />678 607 695 712 812 643 956 742 49.2 <br />682 599 688 709 797 663 909 756 50.4 <br />690 602 686 706 800 690 907 786 52.5 <br />672 619 686 737 815 652 952 692 53.9 <br />680 611 689 739 854 679 1,070 760 54.4 <br />682 582 692 746 897 684 1,010 717 51.5 <br />681 605 702 731 877 647 999 659 42.9 . <br /> <br />General Notes: <br /> <br />II Salinities based on '= of =nstituents' except for BelOW' Hoover Dam which are based on pan residue <br />y 5-Year averages are arithmetic <br /> <br />y 12-lOClnth flOW'-weighted differential between NIB ani Inperial through IOOI'lth shown in left =lumn. <br />