Allah says: "He who is the meadow of Bahrain, this is the torment of the Euphrates, and this is the salt of the concubine, and made between them a barber and an enclosed stone." [Al-Furqan: 53] This verse speaks of the grace of God's blessings on us, which is to make between the fresh river and the salty sea barzha immune to prevent the tyranny of one on the other and maintain the water balance on the planet, so he said: (and make them Barzkha). We note from this verse that the sea can be a frat, and can be salty. In this verse also referred to the existence of a strong barrier and strong called the Koran (Isthmus).
Those who contemplate this verse realize that God is talking about a great miracle and a great verse: the mixing of fresh water with salt water through a barrier and a tight stone. As if God gives us a reference to the importance of this region, the estuaries in the sea, and this is what we will see now scientifically.
What is stone?
Al-Fayrouz Abadi says in the dictionary of the surrounding dictionary: "The stone: prohibition, and grew up in his chamber ie: in the conservation" [1]. And we can conclude that there is a barrier blocked and preserved under the auspices of God, or that there is a region of water surrounded by barriers like a closed room, and Ibn Katheer says in his interpretation of this verse: "Which is the meadow of Bahrain: the creation of water, sweet and salt .. Sweet like rivers, And this is the sweet sea, and he made between them a barzakha: a barrier, and an enclosed stone: that is to prevent one from reaching the other. [2] But what about the modern science and what does it say about that?
The importance of water isthmus
A water isthmus is an estuary when the river meets the sea, ie, when fresh water meets salt water, an area that is closed and surrounded by a water barrier or land. Scientists today call them estuary and these areas are of great interest to scientists, because the mixing of fresh water with salt is a unique phenomenon and truly wonderful [3].
Those who visit this downstream area, or what the Qur'an calls the area of the barrier or isthmus, note the large differences in this environment and the differences in water density, salinity, and temperature from one moment to the next and from one season to another [4], ie mixing, mixing and continuous overlap of freshwater and brackish water .
Perhaps we wonder if we know that the word (meadow) in the verse: (which is the meadow of Bahrain)
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