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<br />WEIGHI'EO M:NIHLY SALINI'l'IES Xl! <br />SEU:CI'ED COLClRAOO RIVER S'IM'IalS .11 <br />AND HJNNIN:i 12-M:!m:1 NIB- IMPmIAL FIa+-WEIGfl'ED SALINI'lY DIFFERENl'IAL <br />(in parts per millien) <br /> <br /> tG <br /> (:. <br /> - <br /> ~ -........... <br /> Below Below Palo Verde At At Northerly Inter- &.. <br /> HOOITer Dam Parker Dam Canal Near Blvthe ~,...i;lll' Dam national 1'lnItrrlRrv 12-ib1th c <br /> 5-Year 5-Year 5-Year 5-Y~ 5-Y~ FlOit-Wtd. . < <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 />March 684 646 610 699 659 727 675 805 677 627 925 742 676 50.6 41.4 <br />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 7,71 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. 682 626 582 692 634 746 655 897 743 684 1,010 879 717 66.9 51.5 <br />Dec. 681 625 605 702 731 877 767 647 999 890 659 68.7 42.9 <br /> 44.6- <br />Jan 99 591 687 730 <br />Feb 99 610 701 856 57.8 <br /> <br />General Notes: <br /> <br />11 Salinities based en 'SUI1I of oanstituents' except for Below Hoover Dam whidl are based en pan residue <br />y 5-Year averages are arithmetic <br /> <br />l/ 12-lOOI1th flow......-eighted differential bet\.-n NIB an:! Inperial through m::mtl1 shoWn in left oolUllll1. <br />