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<br />Month <br /> <br />Jan. <br />Feb. <br />March <br />~ April <br />, May <br />June <br />July <br />August <br />Sep. <br />Oct. <br />Nov. <br />Dec. <br /> <br />WEIGIfi'ED M:lNIHLY SALINITIES M <br />SEIECTED (DLORAOO RIVER STATIONS 1/ <br />AND RUNNING 12-M::lN'IH NIB- IMPERIAL FliM-wEIGIfi'ED SALlliITi' DIFFERENl'IAL <br />(in parts per million) <br /> <br />Bel~ <br />Hoover Dam <br />5-Yeary <br />Avg. <br />1974-78:98:1999 <br /> <br />Bel~ <br />Parker Dam <br />5-Yeary <br />Avg. <br />1974-78:98:1999 <br /> <br />Palo Verde <br />Canal N""r Blvthe <br />5-Year <br />Avg.Y <br />1974-78:98:1999 <br /> <br />At <br />llTIDerial Dam <br />5-Y~ <br />Avg.Y <br />1974-78:1998:1999 <br /> <br />At Northerly Inter- <br />national I3cRIrxiazv <br />5-Y~ <br />Avg.Y <br />1974-78:1998:1999 <br /> <br />o <br />o <br />,....... <br />""""' <br />...... <br />':.., <br /> <br />Rur1n:inJ <br />12-Month I <br />Flow-Wtd. <br />Differential <br />1998 1999 <br /> <br />690 613 591 709 751 913 665 687 1,041 698 730 57.4 44.6 <br />675 610 610 706 732 835 629 701 998 641 856 44.1 57.8 <br />684 610 583 699 727 805 627 710 925 676 782 41.4 60.3 <br />680 602 585 700 714 801 651 684 892 736 773 42.2 59.5 <br />677 595 575 698 709 822 656 705 962 771 795 47.2 55.9 <br />678 607 695 712 812 643 956 742 49.2 <br />682 599 688 709 797 663 909 756 50.4 <br />690 602 686 706 800 690 907 786 52.5 <br />672 619 686 737 815 652 952 692 53.9 <br />680 611 689 739 854 679 1,070 760 54.4 <br />682 582 692 746 897 684 1,010 717 51.5 <br />681 605 702 731 877 647 999 659 42.9 , <br /> <br />General Notes: <br /> <br />1/ Salinities based on 'sum of =nstituents' except for Bel~ Hoover Dam ~ch are based on pan residue <br /> <br />y 5-Year averages are aritlunetic <br /> <br />11 12-lTOnth fl~-weighted differential between NIB ard lJrilerial through ITDnth shown in left =lumn. <br />