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<br />WEIGHI'ID M:NnILY SALINITI&S AT <br />SEU:X::l'ED CXllDRAOO RIVER STATICNl 1/ <br />AND IUlNING 12-M:NIH NIB-IMPERIAL F'laHiEIGIfi'EI) SALINI'lY DIFFERENl'IAL <br />(in parts per million) <br /> <br /> Below Below Palo Verde At At Northerly Inter- ~ <br /> Hoover Dam Parker Dam Canal Near B1 vthe IllIlerial Dam national Boon:larv 12-M:mth . <br /> 5-Yeary 5-Year 5-Year 5-YElll2 5-YElll2 Flow-Wt:d " <br /> Avg. Avg.Y Avg.Y Avg.Y Avg.Y Differenti~.J/ <br />Month 1974-78:97:1998 1974-78:97'1998 1974-78:97:1998 1974-78:1997:1998 1974-78:1997:1998 1997 1998 <br />Jan. 690 655 613 709 668 751 696 913 746 665 1,041 826 698 70.6 57.4 <br />I <br />'" Feb. 675 649 610 706 660 732 670 835 687 629 998 733 641 53.6 44.1 <br />I March 684 646 610 699 727 805 677 627 925 742 676 50.6 41.4 <br />April 680 640 602 700 714 801 676 651 892 766 736 54.4 42.2 <br />May 677 635 698 709 822 703 656 962 760 771 58.2 47.2 <br />June 678 635 607 695 712 812 682 643 956 776 742 66.1 49.2 <br />July 682 634 688 709 797 680 909 764 73.7 <br />Au;Just 690 629 686 706 800 668 907 706 68.7 <br />Sep. 672 628 686 737 815 691 952 717 62.8 <br />Oct. 680 627 689 739 854 717 1,070 843 64.8 <br />Nov. 682 626 692 746 897 743 1,010 879 66.9 <br />Dec. 681 625 702 731 877 767 999 890 68.7 . <br /> <br />General Notes: <br /> <br />1/ Salinities based on 'sum of =nstituents' except for Below Hoover Dam which are based on pan residue <br />y 5-Year averages are arithmetic <br />1/ 12-l1rlnth flow-weighted differential between NIB ani IJrperial throogh I1rlI1th shown in left =lumn. <br />