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<br />w <br />c..n <br />00 <br />w <br /> <br />USBRIMWD SALINITY MANAGEMENT STUDY <br />FINAL REPORT <br /> <br />practices in place to control salinity increases. Figure 2-3 shows an example of this buildup. <br />Figure 2-4 illustrates the current estimated salt balance for the region. Clearly, there is aIf <br />adverse trend. Current annual accumulation of salts within the coastal plain of Southern <br />California is approximately 600,000 tons per year, as depicted in Figure 2-4. Technical <br />Appendix 10 provides a more detailed discussion of the regional salt balance. <br /> <br />Figure 2-3 <br /> <br />Groundwater Trends <br /> <br />(OCWD Well No. 5a-16/1) <br /> <br />750 <br /> <br /> <br />650. <br /> <br /> 550" <br />~ <br />'a, <br />E 460 <br />- <br />tJl <br />C <br />f- 350 <br /> 260 <br /> <br />150 <br />1964 1968 <br /> <br />, , <br />1972 1978 1980 19841988 1992 1998 2000 <br /> <br />This well is illustrative of increasing salinity in the Santa Ana portion of the Orange County <br />Groundwater Basin. Salinity is increasing at a rate of 7.35 mgJL annually. <br /> <br />BOOKMAN-EDMONSTON Section 2 <br />ENGINEERING, INC. 2-4 Salinity Problems, Impacts, & Technology <br />O:\LOCALRES\ANDYS\SALlNITY\JUNE98-2\6SECT2.DOC Last printed 07120/98 10: 17 AM <br /> <br />e <br /> <br /> <br /> <br /> <br /> <br /> <br />e <br /> <br />e <br />