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<br />, <br /> <br />WEIGHTED MONTHLY SALINITIES AT <br />SELECTED COLORADO RIVER STATIONS I' <br />AND RUNNING 12-MONTH NIB-INPERIAL FLOW-WEIGHTED SALINITY DIFFERENTIAL <br />(in parts per million) <br /> <br /> Below Below Palo Verde At At Northerly Inter- <br /> Hoover Dam Parker Dam Canal Near Blvthe Imperial Dam national Boundary <br /> 5-Year 5-Year 5-Year 5-Year 5-Year <br /> avg.P avg.~' avg.P avg.P avg.P <br /> 1974-78 2002 2003 1974-78 2002 2003 1974-78 2002 2003 1974-78 2002 2003 1974-78 2002 2003 <br /> Month <br /> Jan. 690 582 623 709 600 751 613 913 708 711 1,041 856 891 <br /> Feb 675 611 640 706 608 732 615 835 676 700 998 839 798 <br /> March 684 605 601 699 608 727 549 805 675 679 925 783 787 <br /> April 680 600 615 700 609 714 607 801 658 680 892 781 777 <br /> May 677 595 621 698 602 709 617 822 679 962 871 <br />.:.., June 678 600 695 604 712 625 812 684 956 855 <br />, <br /> July 682 610 688 607 709 625 797 684 909 821 <br /> August 690 606 686 609 706 616 800 701 907 828 <br /> Sept 672 603 686 612 737 619 815 699 952 820 <br /> Oct 680 603 689 602 739 603 854 711 1,070 899 <br /> Nov. 682 609 692 609 746 614 897 719 1,010 850 <br /> Dec. 681 609 702 615 731 629 877 756 999 887 <br /> <br />c <br />c.. <br />.-' <br />e,..; <br /> <br />~ <br /> <br />w <br /> <br />Running <br />12-Month <br />Flow-WId. <br />Differential 31 <br />2002 2003 <br /> <br />General Notes: <br /> <br />11 Salinities based on "sum of constituents". <br /> <br />?/ 5-Year averages are arithmetic <br /> <br />'JI 12-month fiow-wei9hted differential between NIB and Imperial Dam through month shown in left column. <br /> <br />. <br /> <br />139.1 143.5 <br />147.0 137.3 <br />152.2 137.7 <br />157.7 134.9 <br />157.6 <br />157.7 <br />159.3 <br />156.1 <br />151.8 <br />146.3 <br />142.1 <br />140.9 <br /> <br />. <br />