[containedgravel]

>Elevated salinity dissipates very quickly from the point of outflow.

I've not seen any evidence supporting this is the case, but the opposite; large swathes of high-saline concentrated blobs sweeping accross the sealife, killing it. We've had to build specialized very long outflow pipes to give the brine even a change to level

[woleium]

Its also denser, so will settle in basins underwater (search for helocline)

[burnished]

If convenient could you link to such?