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<br />00;)571. <br /> <br />. <br /> <br />diversion is usually equal the concentration of the river. In CRSS, some exports <br />occur before the location where quality data are obtained for an inflow point. In these <br />cases, called "~ecial" "~ports, the export quality is provided by recycling thed . .. .... <br />consumption quality (piC up) variable. If a different concentration of the diversion is <br />specified by the user, the river concentration is recalculated as: <br /> <br />previous river . fl d.. . d' . /6) <br />. fl Jl ati. x nver ow - IverslOn concentration x IverSlOn I' <br />nver ow ow concentr on <br />concentration river flow - diversion <br /> <br />2.3.d Return Flows <br /> <br />Return flow concentrations are computed in two stages. First, the concentrating <br />effect of the consumption is computed as: <br /> <br />concentrated return .. . <br />j1 tr,,"k::: dnerSlOn concentration x <br />ow concen .~uon diversion - consumption <br /> <br />diversion <br /> <br />(7) <br /> <br />If a TONPCT has been provided, the salt loading is calculated using the monthly <br />'. mg/L loading provided by the user as: <br /> <br />loaded relum . . leu <br />j1 . = concentrated return flow concentration + salt pre p <br />ow concentration __ <br /> <br />(8) <br /> <br />Flows used in these calculations reflect any shortages. <br /> <br />2.3.e Rivers/Reaches <br /> <br />If an inflow into the river is not a return flow, the concentration in the river is given by <br /> <br />previous river . fl . ,/1 trati'. ,/1 <br />. fl fl . x nver ow + lnJ'ow concen onx lnJ'ow <br />nver ow ow concentration <br />concentration - river flow + inflow <br /> <br />(9) <br /> <br />. <br />