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<br />o <br />(-" <br />,.. <br />w <br />t-" <br />-J: <br /> <br />TABLE 1 -A <br /> <br />&'qllanation of Items Used in Table 1 <br /> <br />IteIn <br /> <br />Explanation <br /> <br />stream floVl. <br /> <br />Directly related to stream's ability to <br />assimilate pollution, to reduce pollution <br />otherwise by dilution, and to satisfy <br />needs of water users. The data must <br />permit reliable predictions of low flows <br />sc that stream uses may be based on an <br />accurate knowledge of critical conditions, <br /> <br />Volume and strength of <br />s6Waf;e and volume and <br />character of industrial <br />wastes. <br /> <br />Define the pollutional load placed on the <br />stream. <br /> <br />Temperature of waters. <br /> <br />Governs the solubility of oxygen and <br />influences rates of purification. <br /> <br />Color. <br /> <br />An index of the amount of material <br />leached from decaying organic matter, <br />and of industrial wastes. This is <br />important in determining treatment <br />required for domestic and industrial <br />water use. <br /> <br />Turbidity. <br /> <br />An index of the density of silt or other <br />suspended matter carried by the stream. <br /> <br />pH. <br /> <br />Or hydrogen-ion concentration, indicates <br />the relative acidity or alkalinity of a <br />wa.ter. <br /> <br />Alkalinity. <br /> <br />I Represents the content of carbonates, <br />bicarbonates, hydroxides, and occasionally <br />borates, silicates, and phosphates. <br /> <br />5-21 <br />