Question

why is salinity is less at river mouth?​

Answer 1

Answer:

Wherever a river comes out of a lake or inland sea, salinity is reduced because salt is taken out of the water bodies by the river. The influx of fresh water brought by the river into the lakes and inland seas also lowers down the salinity.

Answer 2

Explanation:

Wherever a river comes out of a lake or inland sea, salinity is reduced because salt is taken out of the water bodies by the river. The influx of fresh water brought by the river into the lakes and inland seas also lowers down the salinity.