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<br />WEIGHTED MONTHLY SALINITIES AT <br />SELECTED COLORADO RIVER STATIONS 11 <br />AND RUNNING 12-MONTH NIB-INPERIAl FLOW-WEIGHTED SALINITY DIFFERENTIAL <br />On parts per million> <br /> <br /> Below Below Palo Verde At At Northerly Inter- Running <br /> Hoover Dam Parker Dam Canal Near Blvlhe Imoerial Dam national Boundarv 12-Month <br /> 5-Year 5-Year 5-Year 5-Year 5-Year Flow-Wtd, <br /> avg,ZI avg,~ avg,11 avg,Y avg.ZI Differential" <br /> 1974-78 2000 2001 1974-78 2000 2001 1974-78 2000 2001 1974-78 2000 2001 1974-78 2000 2001 2000 2001 <br /> Month I <br /> Jan, 690 559 580 709 604 576 751 634 599 913 688 707 1,041 838 847 87,6 119,3 <br /> Feb. 675 571 578 706 568 591 732 576 593 835 666 655 998 806 758 86.5 115.5 <br /> March 684 586 585 699 576 590 727 586 599 805 650 659 925 743 747 88,5 114,8 <br /> April 680 609 588 700 573 582 714 589 588 801 622 642 892 733 722 91,5 111,4 , <br />, May 677 607 588 698 584 593 709 596 603 822 646 651 962 768 831 95,3 114,2 <br /> 9> June 678 584 588 695 586 584 712 597 595 812 643 655 956 758 816 97,3 116,9 <br />^ July 682 573 592 688 597 709 584 797 653 882 909 759 804 101,8 117,4 <br /> August 690 566 584 686 582 706 582 800 664 702 907 788 876 102,8 119,1 <br /> Sept. 672 543 593 686 570 737 579 815 672 707 952 791 109.6 74,6 <br /> Oct. 680 556 689 565 739 583 854 673 1,070 750 116,9 <br /> Nov. 682 572 692 576 746 824 897 684 1,010 810 120,2 <br /> Dec, 681 578 702 581 731 599 877 683 999 813 119,5 <br /> General Notes: I <br /> 1/ Salinities based on "sum of constituents", <br /> 2! 5- Year averages are arithmetic <br /> ~/ 12-month flow-weighted differential between NIB and Imperial Dam through month shown in left column, <br />