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<br />USBRIMWD SALINITY MANAGEMENT STlIDY <br />FINAL REPORT <br /> <br />W <br />'-II <br />(,.'0 <br />--.l <br /> <br />concentrations, such as boron, chloride, and sodium, must be within certain limits for some <br />crops (e.g., boron for citrus and avocados). A City of Escondido study of avocado crop <br />yields documented lower crop yields from higher TDS recycled water (see Figure 2-7). <br /> <br />Figure 2-7 <br /> <br />Escondido Avocado Study <br /> <br />~ <br />~ <br />~ <br />;- 50 <br />;;; <br />;: <br />a. <br />e <br />" <br /> <br />100 <br /> <br /> <br />o <br /> <br />Potable <br /> <br />Recycled <br /> <br />50/50 Recycled/ Recycled & <br />Potable Blend 40% Leaching <br /> <br />In order to protect existing high-quality groundwater basins, the Regional Water Quality <br />Control Boards (RWQCBs) often set groundwater quality objectives well below 1,000 mg/L <br />of TDS. In some cases, chlorides, not TDS, are the controlling parameter affecting reuse <br />potential and basin water quality objectives. Reclaimed water users that irrigate or recharge <br />groundwater with reclaimed water of higher TDS than these objectives must either provide <br />expensive solutions such as desalters, blend with lower TDS potable supplies, or practice less <br />reuse. <br /> <br />COLORADO RIVER <br /> <br />Colorado River water has long been identified as a significant source of salinity. The very <br />high TDS impacts on Mexico in the mid-1960s, and the Federal Water Pollution Control Act <br />amendments, led to Minute 242 ofthe International Boundary and Water <br /> <br />BOOKMAN-EDMONSTON Section 2 <br />ENGINEERING, INC. 2-8 Salinity Problems, Impacts, & Technology <br />O:\LOCALRES\ANDYS\SALINITY\JUNE98-2\6SECT2.DOC Last printed 07120/98 10: 17 AM <br /> <br />. <br /> <br /> <br /> <br /> <br /> <br /> <br />. <br /> <br />. <br />