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<br />WEIGHI'ED M:JNlliLY SALINITIES Kr <br />SEIECI'ED CDIDRAIXl RIVER STATIOOS 1/ <br />AND RJNNING 12-M:>Nlli NIB-IMPERIAL FI.CM-wEIGHI'ED SALINI'lY DIF'f'EREt,TIAL <br />(in parts per million) <br /> <br /> BelC7<< BelC7<< Palo Verde At At Northerly Inter- ~ . <br /> Hoover Lam Parker Lam Canal Near Bl vthe ImDerial Lam national Boun:larv 12-M:lnth <br /> 5-Yeary 5-Yeary 5-Year y 5-Y~ 5-Y~ F1CM-Wtd. Y <br /> Avg. Avg. Avg. Avg.Y Avg.Y 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 :'12 668 751 725 696 913 831 746 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 />, April 54.4 <br />0"> 680 662 700 683 714 704 801 752 676 892 807 766 74.7 <br />I <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 682 688 684 709 697 797 810 909 830 87.3 <br /> August 690 686 ,,73 706 690 800 778 907 845 77.1 <br /> Sep, 672 686 673 737 685 815 797 952 894 73.4 <br /> Oct, 680 689 673 739 685 854 776 1,070 1,050 74.3 <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 />1/ salinities based on 'sum of constituents' except for BelC7<< Hoover Lam which are based an pan residue <br />y 5-Year averages are arithrretic <br /> <br />y 12-month flC7<<-\oIeighted differential between NIB and IItperial through month sha.m in left column. <br />