Improvement of salinity simulation
The model observation:

1)By comparing with GoMOOS salinity measurement data, the USGS river discharge data seems to underestimate the freshwater loading to the coastal region.
2)
2)The value of the underestimation varies with time.
3)
3)For this reason, the model underestimates the salt content in the coastal region and thus causes an inaccurate simulation of the low-salinity plume.