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8 Na sodium concentration lmg/I) <br />I <br />9 <br />k <br />potassium concentration Imy/1) <br /> 10 HC03 bicarbonate concentration lmg/I) <br />• 11 S04 sulfate concentration lmg/1) <br />~ 12 Cl chloride concentration fmg/)) <br />~ 13 DS dissolved solids as computed from 5C lmg/1) <br /> 14 Fe iron concentration fmg/1) <br />~' IS Mn manganese concentration Img/1) <br />~ In the WATBALC module. IAIl) is permanently set to unity. <br />l This means that water-balance analysis for ~ (index = 1) always <br />is performed despite the user's entry. In addition, the analyses <br />~ of variables may be affected by the IA settings of 5C, DS and <br />~ TSS. For examples, if IA12)=0, then the estimates of Ca, Mg, Na, <br />K, HC03, 504, CI and DS concentrations computed from SC will be <br />` suppressed despite the settings of the IA's of these variables. <br />• Similarly, if IA13)=0, no estimates of Ca, Mg, Na, K, HC03, S04 <br />and Cl concentrations computed from DS will be made. If IAl4)=0, <br />~ then only the estimates of Fe and Mn concentrations will be <br />} affected. <br />If the analysis of a given variable ar set of variables is <br />suppressed through setting the appropriate IA code to zero, no <br />printing or plotting far that variable will be produced despite <br />l <br />the settings of the output controls. <br />IN is an array containing the 6-digit identification codes <br />~ of all the nodes included in a particular streamflow network <br />configuration. IN(I) is the ID of the Ith node. LN(I) is the 6- <br />~ digit ID number of the node immediately downstream of INII). For <br />• example, for the stream network in Figure 1, typical IN and LN <br />code designations are as follows: <br /> <br />~ Fx. 13-5 <br />