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<br />WEIGIfi'ED M:NIHLY SALINITIES Kr <br />SEllCI'ED COIDRAOO RIVER smTIOOS .Y <br />AND RJNNING 12-M::NIH NIB-IMPERIAL FI.CJIoI-WEIGIfi'ED SALINI'lY DIFFERENI'IAL <br />(in parts per million) <br /> <br /> Below Below Palo Verde At At Northerly Inter- RI.Ir1r1iIq <br /> Hoover Om! Parker Om! Canal Near B1 vthe InDerial Om! national Ba.tOOarv 12~ . <br /> 5-Yeary 5-Yeary 5-Year 5-Yeay 5-Y~ F1~.:J/ <br /> Avg. Avg. Avg.Y Avg. Avg. Differential: <br /> Month 1974-78:96:1997 1974-78:96:1997 1974-78:96:1997 1974-78:1996:1997 1974-78:1996:1997 1996 1997 <br /> Jan. 690 672 709 712 668 751 725 696 913 831 746 1,041 967 826 74.8 70.6 <br />, Feb. 675 674 706 705 660 732 741 670 835 800 687 998 892 733 74.9 53.6 <br />'" March 684 666 699 695 727 723 805 778 677 925 831 742 73.3 50.6 <br />, <br /> April 680 662 700 683 714 704 801 752 676. 892 807 766 74.7 54.4 <br /> May 677 660 698 677 709 706 822 754 703 962 774 760 83.8 58.2 <br /> June 678 693 695 672 712 693 812 745 682 956 760 776 90.7 66.1 <br /> July 682 688 684 709 697 797 810 680 909 830 764 87.3 73.7 <br /> August 690 686 673 706 690 800 778 668 907 845 706 77.1 68.7 <br /> Sep. 672 686 673 737 685 815 797 691 952 894 717 73.4 62.8 <br /> Oct. 680 689 673 739 685 854 776 717 1,070 1,050 843 74.3 64.8 <br /> Nov. 682 692 695 746 711 897 820 1,010 1,080 75.0 <br /> Dec. 681 702 700 731 712 877 820 999 1,080 76.7 . <br /> <br />General Notes: <br /> <br />.y Salinities based on 'sum of constituents' except for Below Hoover Om! whidJ. are based on pan residue <br />y 5-Year averages are aritluretic <br /> <br />1/ 12-IOOnth flow-...eighted differential bebleen NIB an:i ~ial throI.I:Jh month shoim in left column. <br />