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<br />Month <br /> <br />Jan <br />Feb <br />March <br />April <br />May <br />~ June <br />July <br />August <br />Sept. <br />Oct. <br />Nov. <br />Dec. <br /> <br />~ <br /> <br />.~ <br /> <br />WEIGHTED MONTHLY SALINITIES AT <br />SELECTED COLORADO RIVER STATIONS 11 <br />AND RUNNING 12-MONTH NIB-IMPERIAL FLOW-WEIGHTED SALINITY DIFFERENTIAL <br />(in parts per million) <br /> <br />c:: <br />c;, <br />..... <br />..-- <br />. f\...:> <br />Runnmg ..-- <br />12-Month <br />Flow-Wtd. <br />Differential 31 <br />2002 2003 <br /> <br />. <br /> <br /> Below Below Palo Verde At At Northerly Inter- <br />Hoover Dam Parker Dam Canal Near Blythe Imperial Dam national Boundary <br />5-Year 5-Year 5-Year 5-Year 5-Year <br />avg.;:1 avg.~ avg.<1 avg.;:1 avg.;:1 <br />1974-78 2002 2003 1974-78 2002 2003 1974-78 2002 2003 1974.78 2002 2003 1974-78 2002 2003 <br /> <br />690 582 623 709 600 665 751 613 648 913 708 711 1,041 856 891 139.1 143.5 <br />675 611 640 706 608 627 732 615 636 835 676 700 998 839 798 147.0 1373 <br />684 605 601 699 608 621 727 549 629 805 675 679 925 783 787 152.2 137.7 .. <br />680 600 615 700 609 628 714 607 631 801 658 680 892 781 777 157.7 134.9 <br />677 595 621 698 602 625 709 617 633 822 679 723 962 871 878 157.6 130.8 <br />678 600 621 695 604 632 712 625 634 812 684 711 956 855 844 157.7 127.2 <br />682 610 623 688 607 635 709 625 637 797 684 671 909 821 810 1593 127.6 <br />690 606 620 686 609 631 706 616 635 800 701 689 907 828 867 156.1 131.0 <br />672 603 618 686 612 634 737 619 643 815 699 708 952 820 869 151.8 133.2 <br />680 603 628 689 602 634 739 603 639 854 711 726 1,070 899 930 146.3 133.0 <br />682 609 641 692 609 746 614 897 719 766 1,010 850 952 142.1 136.4 <br />681 609 645 702 615 731 629 877 756 772 999 887 896 140.9 136_0 <br /> . <br /> <br />General Notes: <br /> <br />11 Salinities based on "sum of constituents". <br /> <br />2,1 5- Year averages are arithmetic <br /> <br />'JI 12-month flow-weighted differential between NIB and Imperial Dam through month shown m left column. <br /> <br />" <br />