This shall help you brother.
https://www.youtube.com/watch?v=LgkiYvB3uJYRead the description of the video which says ( There is a barrier between them. They encroach not (one upon the other)."(55:19-20, Ar-Rehman).
"And He it is Who hath given independence to the two seas (though they meet); one palatable, sweet, and the other saltish, bitter; and hath set a bar and a forbidding ban between them." (25:53, Al-Furqan).
The above verses are on the meeting point of the river water and sea water known as estuary or delta. As we know, all rivers flow into the sea. River water is sweet, that is, drinkable or potable. Salty sea water is undrinkable and bitter. Yet, by the Grace of Allah, the two different kinds of water never get mixed to contaminate the drinkable river water.
At the point of the estuary, there are few small areas where the river water flowing into the sea might taste a little brackish but it's one of the wonders of Allah that this brackish water stays at the estuary and does not flow back into the river to get mixed up with the sweet drinkable water.
Islamophobes and atheists, to show their opposition have argued trying to refute the scientific truth of Verse 25:53. But their own Western oceanographers, marine biologists and geologists have given exactly the same explanation as in Verse 25:53, pointing out the possible reason why the salt water does not contaminate the river water.
Northland Regional Council in its chapter "Estuaries" for schools writes: "Where fresh and salt water mix - The mixing of fresh water and sea water is an important and distinct feature of the estuary. Fresh water, being lighter or less dense than salt water, will flow above the heavier sea water. In estuaries where large amounts of freshwater are discharged, a salt wedge is formed. This is a wedge-shaped, bottom layer of sea water, which is pushed up the estuary along the river bottom with each incoming high tide. The separation between fresh water and salt water can break down on an outgoing low tide when the waters swirl around more. Such conditions of mixing will create zones of brackish, or diluted sea water, a common physical feature of estuaries."
But on the side of the river where the water is hugely important for being drinkable, never gets contaminated nor does it have any brackish or salty zones. That is confirmed as in Verse 25:53.)
