Why is the water pressure in the sea greater at the same depth than in the river?

According to Pascal’s law:
The hydrostatic pressure inside the liquid at any depth does not depend on the shape of the vessel in which the liquid is located, and is equal to the product of the density of the liquid, the acceleration of gravity and the depth at which the pressure is determined:
P = ρ * g * h, where ρ is the density of the liquid, g is the free fall acceleration of a body raised above the Earth g = 9.8 m / s2, h is the depth of immersion in the liquid.
It can be seen from the formula that at the same depth in different liquids the pressure will depend only on the density.
According to the reference book, the density of river water is 1000 kg / m³, and that of seawater is 1030 kg / m³, which means that the pressure in the sea is higher.
Answer: because the density of sea water is higher than that of river water.

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