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<br />WE:IGIfi'ED !oDfIHLY SALINI'l'IES M <br />~ CDlDRllOO RIVER S'lM'ICRl .11 <br />AND RlNNIlG 12-H:NIH NIB-IMPERIAL ~GIfiEI) SALINI'lY DIFFERENl'IAL <br />(in parts per mill100) <br /> <br /> Below Below Palo Verde At At Northerly Inter- Runnin;J . <br /> Hoover I:am Parker I:am Canal Near Bl vthe :rncerial I:am national BcRm:liuv 12-fbrt:h <br /> 5-Year 5-Year 5-Year 5-Y~ 5-Y~ Flow-Wtd.y <br /> Avg.Y Avg.Y Avg.Y Avg. Avg. Differential <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 /> Feb. 675 649 610 706 660 732 670 835 687 629 998 733 641 53.6 44.1 <br />I March 684 646 610 699 659 727 675 805 677 627 925 742 676 50.6 41.4 <br />'" <br />I April 680 640 602 700 650 714 664 801 676 651 892 766 736 54.4 42.2 <br /> May 677 635 595 698 639 709 641 822 703 656 962 760 771 58.2 47.2 <br /> June 678 635 607 695 635 712 631 812 682 643 956 776 742 66.1 49.2 <br /> July 682 634 599 688 644 709 647 797 680 663 909 764 756 73.7 50.4 <br /> August 690 629 602 686 634 706 645 800 668 690 907 706 786 68.7 52.5 <br /> Sep. 672 628 619 686 616 737 640 815 691 652 952 717 692 62.8 53.9 <br /> Oct. 680 627 611 689 624 739 647 854 717 679 1,070 843 760 64.8 54.4. <br /> Nov. 682 626 571 692 634 746 655 897 743 1,010 879 66.9 <br /> Dec. 681 625 702 731 877 767 999 890 68.7 <br /> <br />General Notes: <br /> <br />11 Salinities based on I sum of constituents I except for Below Heaver I:am which are based en pan residue <br /> <br />y 5-Year averages are arithmetic <br /> <br />y 12-m.:mt:h flCJW-1r11E!ighted differential betlJeell NIB and IItperial through m.:mt:h sham in left col\DD1l. <br />