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<br />WEIGIfl'El) M'JNIHLY SALINITIES AT <br />SELECl'ED cnlDRAOO RIVER STATIONS Y <br />AND RJNNING 12-MJNIH NIB-IMPERIAL FI.CM-WEIGIfl'El) SALINITY DIF'FERENI'IAL <br />(in parts per million) <br /> <br /> Below Below Palo Verde At At Northerly Inter- ~ . <br /> Hoover D3m Parker D3m Canal Near Blvthe Inu:Jerial D3m national Boordarv U-iblth <br /> 5-Yeary 5-Yeary 5-Year y 5-Y~ 5-Y~ FlCM-Wtd.y <br /> Avg. Avg. Avg. Avg.Y Avg.Y Differential <br /> Month 1974-78:98:1999 1974-78:98:1999 1974-78:98:1999 1974-78:1998:1999 1974-78:1998:1999 1998 1999 <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 680 602 585 700 610 614 714 613 625 801 651 684 892 736 773 42.2 59.5 <br /> May 677 595 575 698 611 595 709 619 618 822 656 705 962 771 795 47.2 55.9 <br />I June 678 607 571 695 614 580 712 620 599 8U 643 680 956 742 778 49.2 54.5 <br />~ <br />I July 682 599 604 688 590 597 709 600 610 797 663 678 909 756 732 50.4 51.6 <br /> August 690 602 604 686 588 706 601 800 690 698 907 786 822 52.5 52.0 <br /> Sep. 672 619 581 686 587 737 597 815 652 643 952 692 692 53.9 53.1 <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 /> Dec. 681 605 702 581 731 596 877 647 999 659 42.9 <br /> <br />General Notes: <br /> <br />Y Salinities based on 'stnn of cxmstituents' except for Below Hoover D3m \oIhi.dl are based on pan residue <br /> <br />y 5-Year averages are arithmetic <br /> <br />y 12-Il'Onth flow-weighted differential between NIB am Inperial through Il'Onth shCMl in left =1=. <br /> <br />.' <br />