Laserfiche WebLink
<br />2-14 <br /> <br /> <br />r:.u <br />CD <br />CJl <br />c.n <br /> <br />Table 2.4 <br />Colorado River Salinity Projections, 2015 <br /> <br />Station Numeric Mean Minimum Maximum <br /> Criteria Salinity Salinity Salinity <br /> (mg/L) (mg/L) (mg/L) (mglL) <br />Colorado River below 723 680 536 833 <br />Hoover Dam <br />Colorado River below 747 704 549 869 <br />Parker Dam <br />Colorado River at 879 822 625 1023 <br />Imperial Dam <br /> <br />Future salinity concentrations will depend not only upon human activities but upon natural <br />phenomena, such as runoff conditions, natural evapotranspiration, and precipitation, dissolution <br />and mixing within the major storage reservoirs. Even with a full salinity control effort that <br />would offset human impacts since 1972, the actual salinities at the criteria stations (and <br />elsewhere in the basin) will continue to fluctuate with hydrologic conditions in the future. <br /> <br />Figures 2.7, 2.8 and 2.9 summarize the results from past Reclamation progress reports4, <br />comparing the adjusted salinity (to reflect long-term mean water supply) to the numeric criteria <br />at the three water quality stations through time. The figures show that at times in the past, <br />adjusted salinities have been above the numeric criteria. The most recent analysis shows that <br />this condition has improved. The salinity program has been able to maintain salinity at or below <br />the numeric criteria. Those results show the salinity control program has been able to meet its <br />objective of maintaining the numeric criteria by offsetting the effects of water development since <br />1972. <br /> <br />4Quality of Water. Colorado River Basin. Pro~ress Re.port, No.1 through 16. <br />