I have read reports that 90% of May's inflow to Lake Oroville was immediatlely discharged, to maintain (a particular definition of) the river habitat downstream. Unfortunately, CDEC's website with data for California is apparently down, otherwise this link would confirm this:
https://cdec.water.ca.gov/cgi-progs/queryF?OROObviously, growing water-intensive produce in the desert does not help the situation.