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<br />.\ <br /> <br />. <br /> <br />. <br /> <br />....'. <br />~ <br />CJ <br /> <br />100,;-.. <br /> <br />Total Dissolved Solids (TDS) is an aggregate of carbonates, bicarbonates, <br />chlorides, sulfates, phosphates, nitrates, etc., of calcium, magnesium, <br />manganese, sodium, potassium, and other cations which form salts. High TDS <br />solutions have the capabi Ii ty of changing the chemical nature of water. <br />High TDS concentrations exert varying degrees of osmotic pressures and <br />often become lethal to the biological inhabitants of an aquatic environ- <br />ment. The common term for TDS is salt. <br /> <br />Total Salt Load is the total quantity of salts, as measured by dry mass or <br />volume, that is dissolved in a specific amount of water (discharge) <br />passing a given point during a given time. <br /> <br />Transmountain Diversion is the total amount of water diverted out of its <br />original basin. <br /> <br />Virgin Flow is the historical flow at the point of measurement corrected <br />for the effects of manmade developments in the drainage basin above the <br />point of measurement. <br /> <br />Water Year 1S the 12 month period, October 1 through September 30. The <br />water year is designated by the calendar year in which it ends and which <br />includes 9 of the 12 months. Thus, the year ending September 30, 1978, is <br />called the "1978 water year." <br /> <br />127 <br />