I looked at the CDEC website for Yuba flows and see that the Smartville flow is currently about 700cfs while the flow at the Marysville station is about 400cfs. I don't usually don't look at the Smartville gauge so I'm puzzled by the lower flow downriver at Marysville compared to the Smartville gauge. Is 300cfs being diverted or percolating into the ground by the time the river hits Marysville?