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<br />000572 <br /> <br />Likewise, if the inflow is a return flow point, the concentration is the river is given by <br /> <br />. <br /> <br />river flow <br />concentration <br /> <br />river flow concentration x river flow + return flow concentration x retu) <br />river flow + return flow <br /> <br />(10) <br /> <br />IIf a ~NPCT has not been orovided" the return flow concentration already incluQes ..=::. <br />"- the salt load. Otherwise, it only includes the concentration effect. If the salt load has "'> <br />been specified with a TONPCT card and the shortaqe is less than 75 percent, the salt \ ~ <br />pickup from the return is applied directly to the river. The monthly pickup in tons is v'- ';~v~""'''r''- <br />proportioned to the annual pickup in tons time the ratio of shorted flow to unshorted -. '( <br />flow. The pickup is applied as: ... ~ <br /> <br />river flow <br />concentration <br /> <br />river concentration x river flow + salt pickup mass <br />river flow <br /> <br />(11) <br /> <br />At specific check stations, mJ'ls<:"ges are printed for the following: <br />- <br /> <br />.' <br /> <br />. concentration in the river> max quality <br />concentration in the river < min quality <br /> <br />2.3.f Computation for Water Quality Improvement Projects (WQIP's) <br /> <br />CRSS checks if sufficient salt exists in the river to remove all the accumulated salt <br />removal of all the water quality improvement projects. If not, the deficit is summed in <br />an array (SUMSAL T) and removed in su~equent months wh(1n there is sufficient ~alt <br />mass in the river. <br /> <br />\Q..~~"" <br />If the concentration in river is than or equal the minimum concentration (hard wired at <br />" <br />50 mg/L), then: <br /> <br />new sumsalt array = current sumsalt array + salt mass required to be removed <br />by the WQIP (tons) <br />set salt removed (for this month) by the WQIP = 0.0 <br />- <br /> <br />If the concentration in river is greater than minimum concentration, then the maximum <br />salt amount that can be removed without going below minimum concentration is: <br /> <br />. <br />