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<br />WEIGfi'ED M:JNIHLY SALINITIES AT <br />SEIECl'ED COI.ORAOO RIVER smTIONS 11 <br />AND aJNNlNG 12-MJtmi NIB-IMPERIAL F'LCM-wEIGfi'ED SALINl'IY DIFFEREm'IAL <br />(in parts per million) <br /> <br /> Below Below Palo Verde At At Northerly Inter- Runni.rg <br /> Hoover [am Parker [am Canal Npl'lT Blvthe Inu:lerial D3m national Bc:mrl""" 12-Month <br /> 5-Yeary 5-Yeary 5-Year y 5-Y~ S-Yeay FlCM-Wtd. 3 <br /> Avg. Avg. Avg. Avg.Y Avg. Differenti. <br /> Month 1974-78:98:1999 1974-78:98:1999 1974-78:98:1999 1974-78:1998:1999 1974-78:1998:1999 1998 19 <br /> Jan. 690 613 591 709 623 591 751 609 598 913 665 687 1,041 698 730 57.4 44.6 <br /> Feb. 675 610 610 706 615 579 732 624 609 835 629 701 998 641 856 44.1 57.8 <br /> March 684 610 583 699 607 604 727 612 616 805 627 710 925 676 782 41.4 60.3 <br /> April 68D 602 585 700 610 614 714 613 625 8Dl 651 684 892 736 773 42.2 59.5 <br />I May 677 595 575 698 611 709 619 822 656 705 962 771 795 47.2 55.9 <br />'" <br />I June 678 607 571 695 614 712 620 812 643 680 956 742 778 49.2 54.5 <br /> July 682 599 604 688 590 709 600 797 663 678 909 756 732 50.4 51.6 <br /> August 69D 6D2 604 686 588 706 6D1 8DO 690 698 907 786 822 52.5 52.0 <br /> Sep. 672 619 686 587 737 597 815 652 952 692 53.9 <br /> Oct. 680 611 689 592 739 597 854 679 1,070 760 54.4 <br /> Nov. 682 582 692 600 746 605 897 684 1,010 717 51.5 <br /> rec. 681 605 7D2 581 731 596 877 647 999 659 42.9 <br /> . <br /> General Notes: <br /> 11 Salinities based on 'S\ll1\ of constituents' except for BelOtl Hoover Dam '</hid!. are based on pan residue <br /> y 5-Year averages are arit:hm:tic <br /> <br />1/ 12-lTOnth flow-weighted differential between NIB am Inplrial through lTOJ'lth shown in left column. <br />