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<br /> <br />w <br />CJ1 <br />en <br />U) <br /> <br />mgllat Imperial Dam. Reclamation estimates that when <br />natural flows return to more normal conditions and flows to <br />Mexico no longer exceed scheduled deliveries, <br />concentrations will increase quickly to pre-1982 levels of <br />800 mg/l, or greater. <br />The flow-weighted annual average salinity at the <br />stations for which numeric criteria have been set are shown <br />in the following tabulation. <br /> <br /> ruM-WEIGIfl'I!D AVBlVoGE l\mtJAL S/\LINITY CXN::I!lITRATICJlS <br /> AT SElB:!M> STATICJlS <br /> ('!'Otal Dissolved Solids in 1Wl/l*) <br /> C614hlar Year <br /> Nllneric <br /> criteria 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 <br />&elCM Ho:>ver <br />Dam 723 675 681 680 674 665 678 6B8 691 681 679 665 611 500** 519** <br />Below Parker <br />Dam 747 709 702 702 690 687 688 701 712 716 713 678 611 580** 559** <br />At Int>erial <br />Il!llll 879 843 834 829 822 819 812 802 760 821 826 710 675 607** 579** <br /> <br />*Determined I:!i the = from data, coUe::ted I:!i Re::lamati", <br />ard the U.s. Geolog ieal Survey ard p.1blished in 'Qoali ty <br />of Water - O:>lorado River Basin," Pt09ress Report No. 13, <br />January 1986. <br /> <br />**Provisional records. <br /> <br />Projections of Future Water Use <br />One of the significant factors affecting salinity <br />concentrations is water use. Estimates of both 1986 water <br />use and projected future use through the year 2010 for each <br />of the seven states were developed jointly by the states <br />and Reclamation. <br />Table 2 presents a summary of projected water use in <br />the Upper Colorado River Basin, and from the main stem of <br />the Lower Colorado River. Figure 4 presents the total use <br />in graphical form for the Basin. Presented in Appendix D <br />are data on 1986 base conditions and projected future uses <br />by st~te and by specific categories of use. <br /> <br />-11- <br /> <br />