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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 />WEIGHl'ED M:NIHLY SALINITIES l>Ir <br />SEIECI'ED OJIDRAOO RIVER smTIOOS 11 <br />AND RJNNING 12-M:WIH NIB- IMPERIAL F'l.CM-wEIGIll'ED SALINITll DIF'FERENI'IAL <br />(in parts per million) <br /> <br />Below <br />Hoover CImt <br />5-Yeary <br />Avg. <br />1974-78:96:1997 <br /> <br />690 672 <br />675 674 <br />684 666 <br />680 662 <br />677 660 <br />678 693 <br />682 <br />690 <br />672 <br />680 <br />682 <br />681 <br /> <br />General Notes: <br /> <br />Below <br />Parker CImt <br />5-Yeary <br />Avg. <br />1974-78:96:1997 <br /> <br />709 712 668 <br />706 705 660 <br />699 695 <br />700 683 <br />698 677 <br />695 672 <br />688 684 <br />686 573 <br />686 673 <br />689 673 <br />692 695 <br />702 700 <br /> <br />Palo Verde <br />Canal Near Bl vthe <br />5-Year y <br />Avg. <br />1974-78:96:1997 <br /> <br />751 725 696 <br />732 741 670 <br />727 723 <br />714 704 <br />709 706 <br />712 693 <br />709 697 <br />706 690 <br />737 685 <br />739 685 <br />746 711 <br />731 712 <br /> <br />At <br />InIJerial CImt <br />5-Y~ <br />Avg.Y <br />1974-78:1996:1997 <br /> <br />913 <br />835 <br />805 <br />801 <br />822 <br />812 <br />797 <br />800 <br />815 <br />854 <br />897 <br />877 <br /> <br />831 <br />800 <br />778 <br />752 <br />754 <br />745 <br />810 <br />778 <br />797 <br />776 <br />820 <br />820 <br /> <br />746 <br />687 <br />677 <br />676 <br />703 <br />682 <br />680 <br />668 <br />691 <br />717 <br /> <br />o <br />= <br />~-...:. <br />=> <br />C') <br />....... <br /> <br />At Northerly Inter- <br />national Boorr::larv <br />5-Y~ <br />Avg. <br />1974-78:1996:1997 <br /> <br />~ <br />12-tb1th . <br />FlCM-+lt:d. ., J <br />Differential'" <br />1996 1997 <br /> <br />1,041 967 <br />998 892 <br />925 831 <br />892 807 <br />962 774 <br />956 760 <br />909 830 <br />907 845 <br />952 894 <br />1,070 1,050 <br />1,010 1,080 <br />999 1,080 <br /> <br />826 <br />733 <br />742 <br />766 <br />760 <br />776 <br />764 <br />706 <br />717 <br />843 <br /> <br />11 Salinities based on 'sum of constituents' except for Below Hoover CImt which are based an pan residue <br />y 5-Year averages are arithmetic <br /> <br />:J/ 12-month flow-weighted differential between NIB am Inperial through month shown in left column. <br /> <br />74.8 <br />74.9 <br />73.3 <br />74.7 <br />83.8 <br />90.7 <br />87.3 <br />77.1 <br />73.4 <br />74.3 <br />75.0 <br />76.7 <br /> <br />70.6 <br />53.6 <br />50.6 <br />54.4 <br />58.2 <br />66.1 <br />73.7 <br />68.7 <br />62.8 <br />64.8 <br /> <br />. <br />