Annual mean values of salinity, temperature, and inflow volume

Figure 6. Annual mean values of salinity, temperature, and inflow volume from 1990 to 2016. Where both upper and lower sensors were available at the same site, data from the upper sensor is shown. Top: annual mean specific conductance and salinity, by station: 1) Benicia Bridge; 2) Carquinez Bridge; 3) Richmond Bridge; 4) Alcatraz Island; 5) San Mateo Bridge. Middle: annual mean water temperature, by station. Bottom: annual volume of freshwater inflow from the Sacramento–San Joaquin River Delta to the San Francisco Bay, based on DAYFLOW model output (California DWR, 2017). Years with insufficient data were excluded (for example, Carquinez Bridge during water years 2012–14). Diamonds indicate the peak annual mean values for the period of record.