Unless there are high Delta inflows, south Delta export pumping creates a hydrologic “trap” for emigrating salmon and other Delta fishes. Even under moderate Delta inflows and outflows, as occurred in January 2019 (Figure 1), south Delta pumping traps salmon … Continue reading
Hatcheries in California are releasing tens of millions of salmon smolts in 2022, per normal operations. State hatcheries are trucking over ten million fall-run salmon to the Bay again this spring because of the drought. State and federal hatcheries are … Continue reading
During early November, juvenile winter-run salmon were moving into the Delta after two short fall rainfall pulses (Figure 1). The allowed export of 65% of Delta inflow is not protective of these wild young winter-run salmon, which are in short … Continue reading
A modest production of winter-run salmon fry was achieved in the Sacramento River near Redding this summer (Figure 1).1 With the recent storm that peaked on October 24, these young salmon are now moving down the river toward the Delta … Continue reading
The Delta is an important nursery area for Central Valley Salmon. This fact continues to be ignored or under-appreciated. The phenomenon is fully consistent with the general science on salmon in their southern range in the eastern Pacific. Nearly all … Continue reading