Problem No. 2 A river receives a discharge of 10 MGD at a concentration of 150 mg/l. The river flow upstream is 20 MGD a
Posted: Wed May 04, 2022 9:17 am
Problem No. 2 A river receives a discharge of 10 MGD at a concentration of 150 mg/l. The river flow upstream is 20 MGD at zero concentration. For 15 mi downstream, the velocity is 10 mpd. A region of slow moving water is then encountered for the next 20 mi where the velocity drops to 2 mpd. If the decay rate of the substance is 0.2/day, what is the concentration at the point 35 mi downstream from the outfall? Calculate the fraction of incoming contaminant that is removed by reaction in the first and second reach.