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<br />WEIGHTED MONTHLY SALINITIES AT <br />SELECTED COLORADO RIVER STATIONS 1/ <br />AND RUNNING 12-MONTH NIB-INPERIAL FLOW-WEIGHTED SALINITY DIFFERENTIAL <br />(in parts per million) <br /> <br /> Below Below Palo Verde At At Northerly Inter- Running <br /> Hoover Dam Parker Dam Canal Near Blvthe Imoerial Dam national BoundalV 12-Month <br /> 5-Year 5-Year 5-Year 5-Year 5-Year Flow-WId. <br /> avg,Y avg .21 avg.21 avg.Y avg,21 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 ( <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 68,5 114,8 <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 />";" June 678 584 588 695 586 584 712 597 595 812 643 655 956 758 816 97.3 116,9 <br /> July 682 573 592 688 597 709 584 797 653 682 909 759 802 101.8 117.6 <br /> August 690 566 686 582 706 582 800 664 907 788 102.8 <br /> Sept. 672 543 686 570 737 579 815 672 952 791 109.6 <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 /> Dee, 681 578 702 581 731 599 877 683 999 813 119.5 <br /> <br />General Notes: <br /> <br />. <br /> <br />11 Salinities based on "sum of constituents". <br /> <br />2! 5-Year averages are arithmetic <br /> <br />'J.I 12-month flow-weighted differential between NIB and Imperial Dam through month shown in left column, <br />